Choke shotgun markings

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Jun 26, 2014 · Browning BSS 20ga chote markings. I have a 20 ga 26" tubes,fixed chokes, where are the choke markings on the barrel. I am use to the old system of stars and dashes. This is a BSS and the only thing I see under the forearm is a 3 on one barrel and a 5 on the other. Any help would be appreciated. How to identify the right Choke Tube for your gun: Identification Methods. 1) Visual Method. 2) Choke Measurement Method. 3) Barrel Markings Method. 4) Serial Number Method. Choke Tube Constrictions chart. How can I identify which screw in choke tubes I should use in my Beretta shotgun: Mobilechoke, Optima-Choke, Optima-Choke Plus, or Optima ...Yes, the Stoeger M3500 is compatible with most Benelli Mobilchoke-style choke tubes. 2. Are the choke tubes that come with the Stoeger M3500 suitable for all types of hunting? Yes, the included choke tubes provide options for a variety of hunting situations, including upland birds and turkey. 3.May 30, 2023 · The second shotgun choke that worked really well in the field – in that it was effective and forgiving in use – was a standard Beretta Improved Cylinder Mobilchoke tube. This is a conventional shotgun choke with about five thou of constriction. With the duffer’s gun, I once accounted for 18 average pheasants for 17 shots. When you open the gun, turn it sideways and there should be marks where the barrels go into the receiver. The marks should be something to the extent of *- or something like that. There is a thread at the top of this forum about Browning choke codes. Good luck! Open the gun and look on the left side of the Mono Block.

Choke tube markings are a series of lines, notches, letters, ... Light modified diameters can differ based on shotgun brand and choke system. Below is a chart showing the diameter of LM chokes by brand. Type LM Diameter (inch) Beretta/Benelli Mobil: 0.706: Benelli Crio: 0.707: Optima-Choke choke tubes will be marked Optima-Choke. The start of the threaded portion of the Optima-Choke tube is located a nominal 50.78 mm (2.00 inch) from the breech end of the choke tube. The length of the threaded portion is a nominal 15.9 mm (.625 inch). The major diameter of the choke tube thread is 20 mm (.787 inch). Sep 25, 2019 ... Shooting forum · Shotguns - 12 gauge, 28 gauge, 410 bore etc. Miroku choke markings & steel. Double barrel, side by side, over-under, semi ...Gunsmithing. Briley Showroom. Mattarelli USA. Briley 3Gun. Premium European to American Markings Choke Charts which are manufactured to be the best in market with the highest quality shotgun, firearm, and rifle standards. Shop now for European to American Markings at Briley, A Legacy of Shooting Innovation.Jan 23, 2023 · Arikara. Correct. For a while in the Flues era Ithaca marked the chokes as a fraction -- 1/4. 2/4, 3/4 & 4/4. Mine is marked 2 on the right tube and 4 on the left. Pretty much standard choke selections for general hunting purposes. Thanks for the photo. your gun is apparently older than mine. My sn begins with 372XXX. 2454 posts · Joined 2006. #3 · Dec 6, 2007. The Franchi is an European made shotgun.Most European shotguns are marked with stars on the barrel as to the choke rather than being marked with the the words. On the barrel of the shotgun there should be a series of stars.One star /full,two stars improved modified,three …6240 posts · Joined 2007. #4 · Feb 11, 2010. Measuring is an indication. The only real way to know what the choke is is to shoot patterns at 40 yards, draw a 30-inch circle around the most hits and start counting. By definition choke is the percent of the charge in a 30-inch circle at 40 yards. Like.

Mark Lowry is a renowned comedian, singer, and songwriter who has been entertaining audiences for decades. With his unique blend of humor and heartfelt storytelling, Mark has capti...Improved cylinder: Offers a constriction of 0.010 inch, and is used to get a nice pattern up to about 30 yards. Like the aforementioned cylinder choke, it is also a popular choice with skeet, trap, and clay shooters. Modified: This choke provides a constriction of 0.020 inch, and is effective up to about 45 yards.The Titan or the Poly-Choke will add a big gobbet of weight to the snout of your gun. The Poly-Choke II is heavier than the screw choke it replaces. The screw-in Tru-Glo Titan weighed 2-1/2 ounces, while the flush mount choke it replaced weighed 11/16 oz. I don’t know for sure what the non-vented Poly-Choke II weighs, but you should find out ...Jul 1, 2015 · Identification (Notches, Stars, Alpha Code, or Color Band) Full Choke: I notch, or * star. Improved Modified: II notches, or ** stars. Modified: III notches, or *** stars. Improved Cylinder: IIII notches, or **** stars. Jun 22, 2016 · 933 posts · Joined 2012. #20 · Jul 29, 2016. Some trivia collector minutia - The choke words were stamped on the barrels prior to 1929. The transition from the barrel address from Ogden to St Louis began in 1929 and completed in 1930. Feb 20, 2024 · Simply visually inspect the muzzle of your shotgun to determine which type of choke tube you have. 7. Do Stoeger choke tubes come with wrenches for installation? Many Stoeger choke tubes come with a wrench for easy installation and removal, but it’s always good to have a dedicated choke tube wrench for added convenience.

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Here we present a brief introduction to Beretta Choke Tubes Families and markings. Every shotgun has a different type (Family) of barrels, and every barrel is only compatible with chokes made specifically for its Family. The main Families are four: Mobilechoke, Optima-Choke, Optima-Choke Plus, or Optima-Choke HP.Understanding the Notch System. The notch system used can vary between manufacturers, but most commonly, a single notch indicates a full choke, suitable for long-range shots with a tight shot pattern. Two notches typically represent an improved modified, providing a slightly wider pattern.You should find some marks on the left side of the barrel down around the locking block. It could be a series of dots, stars or dashes stamped on the block. Some manfactures stamp the choke bore diamater, and of course you can allways measure the bore at the barrel end. Old school rule of thumb, if a dime willl not enter the bore at the …Dear David, Your have your wish! In “Browning speak” modified choke is ** and improved cylinder is **- . This would be very typical choking for one of their 26-1/2″ barreled O/Us. Usually the 28″ barreled B25 Superposed guns came in Mod/Full. Of course, on special order you could get anything you wanted.Invector choke tubes are a standard for early model Browning shotguns, but they also fit certain Winchester and Mossbergshotguns. Invector threads are located at the bottom of the choke and are 1.5-inches long. Standard Invector chokes fit the following shotguns: Winchester Invector. Fits Winchester 1200, 1300, 1400, 1500, & Ranger …A shotgun choke modifies how shot leaves the barrel, and therefore how it travels through the air. By picking the right choke, you can increase your chances of hitting a target. For a close proximity target a wider spread of shot is ideal, whereas at distance a tighter shot pattern is preferable. Close, moving targets require a more rapid response.

Feb 20, 2024 · Simply visually inspect the muzzle of your shotgun to determine which type of choke tube you have. 7. Do Stoeger choke tubes come with wrenches for installation? Many Stoeger choke tubes come with a wrench for easy installation and removal, but it’s always good to have a dedicated choke tube wrench for added convenience. The fractions represent the degree of choke with respect to Full. For example, Full choke is the same in both worlds. That which we call Improved Modified is 3/4 choke. Modified is 1/2 choke and IC is 1/4 choke. Going back a few decades, a Full choke for a 12 ga was .040 inch, IM was .030, M was .020 and IC was .010. So, 40/40 = 1 or full.The choke tube markings on a Franchi 48/AL 28 gauge semiautomatic shotgun will usually be printed on the side of the choke tube with an identification letter. The letters commonly used are C (Cylinder), IC (Improved Cylinder), M (Modified), and IM (Improved Modified).A choke is a valve installed in a carburetor that restricts air flow, which enriches the fuel-air mixture when an engine is started. According to Autorized.com, a choke is designed...May 30, 2023. 0 shares. Shotgun choke can be a daunting subject, but can make all the difference to your shooting, so it's well worth following The Field's definitive guide. Learn exactly what shotgun choke is, what it does, how it affects your shooting and which you should be using.Jul 1, 2015 · Identification (Notches, Stars, Alpha Code, or Color Band) Full Choke: I notch, or * star. Improved Modified: II notches, or ** stars. Modified: III notches, or *** stars. Improved Cylinder: IIII notches, or **** stars. Most double shotguns represented here. Double gun shotguns - Side by Side shotguns, and over under shotguns - Including drillings, double barreled rifles, SxS double rifles, combination guns. Makers - Darne, Merkel, Arrieta, Beretta, Browning, Holland, Purdey, Richards, Bernardelli, Parker, Fox, LC Smith, and most other double barreled shotgun, …To do this, shoot off a rest at a center mark in a 30-inch circle at 40 yards. Full choke should put 70 percent of the shot in the circle, modified 60 percent, improved cylinder 45 percent. Cylinder, or no choke at all, should shoot from 25 to 35 percent. With interchangeable choke tubes, a hunter can use the.Definition of Chokes. A choke is a tapered constriction of a shotgun’s barrel bore at the muzzle end. Chokes are used to shape the spread of the shot in order to gain better range and accuracy. They come in different types, each designed for a specific purpose in shooting. Definition of Skeet Shooting.Jul 13, 2015 ... Benelli Tech Shop Benelli shotguns come equipped with up to five choke tubes, and changing them out is a breeze! In this video, learn how to ...Choke tubes help sharpen your shotgun’s accuracy when hunting game and offer a myriad of benefits for hunters. Among the top remains the fact that chokes give you the ability to turn a single shotgun into a tool capable of specializing in many types of game hunting.

How to identify the right Choke Tube for your gun: Identification Methods. 1) Visual Method. 2) Choke Measurement Method. 3) Barrel Markings Method. 4) Serial Number Method. Choke Tube Constrictions chart. How can I identify which screw in choke tubes I should use in my Beretta shotgun: Mobilechoke, Optima-Choke, Optima-Choke Plus, or Optima ...

Arikara. Correct. For a while in the Flues era Ithaca marked the chokes as a fraction -- 1/4. 2/4, 3/4 & 4/4. Mine is marked 2 on the right tube and 4 on the left. Pretty much standard choke selections for general hunting purposes. Thanks for the photo. your gun is apparently older than mine. My sn begins with 372XXX.CZ 1012 G3 12 gauge: interchanges with Trulock’s CZ II style. (Flush choke length 2.750 in.) CZ 620 20 gauge: interchanges with Trulock’s Benelli Mobil style. CZ 628 28 gauge: interchanges with Trulock’s Beretta Mobil style. CZ Bob White: interchanges with Trulock’s Beretta/Benelli Mobil style.Using the factory barrel markings is a great way to identify your choke. But, it is not always 100% accurate. This doesn’t help if the choke was opened up by a gunsmith at one point or another. ... Using this method can add versatility to your fixed choke shotgun by identifying loads that shoot different spreads and using that load for ...May 30, 2023 · The second shotgun choke that worked really well in the field – in that it was effective and forgiving in use – was a standard Beretta Improved Cylinder Mobilchoke tube. This is a conventional shotgun choke with about five thou of constriction. With the duffer’s gun, I once accounted for 18 average pheasants for 17 shots. Hello, i came to this forum to get some help determining the type of chokes on my shotgun, its a Acciao Breda B4 oxu, old shotgun, the markings on my Left (upper) barrel is 18.4 and on the Right (lower) is 18.3, im pretty lost on how to calculate the choke type, if anyone could help me know more about my shotgun not only choke type …Choke tubes control the dispersion of shot inside the shotshell. Without a choke tube added to the barrel's end, there would be no way to control the barrel's payload. The payload is the shot coming down the barrel, and that shot is concealed in a wad. If your shotgun barrel is threaded for chokes, don't ever fire the shotgun without placing a ...What do the markings on chokes mean? Markings on chokes indicate the level of constriction, with designations such as Cylinder, Improved Cylinder, Modified, Improved Modified, and Full. 4. What is Cylinder choke? Cylinder choke has no constriction and provides the widest shot pattern. 5. What is Modified choke?barrels. Choke designation indicates the dispersion pattern characteristics of the shotgun bore. The chart on the following page provides identification for choke and a pattern percentage within a 30 inch circle at specified ranges. Identification Description Percentage Distance 1/1 Full Choke 7 0 - 75 3 5mOptima-Choke choke tubes will be marked Optima-Choke. The start of the threaded portion of the Optima-Choke tube is located a nominal 50.78 mm (2.00 inch) from the breech end of the choke tube. The length of the threaded portion is a nominal 15.9 mm (.625 inch). The major diameter of the choke tube thread is 20 mm (.787 inch). Optima-Choke choke tubes will be marked Optima-Choke. The start of the threaded portion of the Optima-Choke tube is located a nominal 50.78 mm (2.00 inch) from the breech end of the choke tube. The length of the threaded portion is a nominal 15.9 mm (.625 inch). The major diameter of the choke tube thread is 20 mm (.787 inch).

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Choke tubes control the dispersion of shot inside the shotshell. Without a choke tube added to the barrel's end, there would be no way to control the barrel's payload. The payload is the shot coming down the barrel, and that shot is concealed in a wad. If your shotgun barrel is threaded for chokes, don't ever fire the shotgun without placing a ...Browning choke tubes use several systems for identification. Some are useful in the field, and others when the choke tube is out. Choke tubes supplied with your Browning shotgun often have notches in the top …Feb 25, 2024 · About 40 percent of a shell’s total pellets will fit in a 30-inch circle at 40 yards without constriction. You will want to keep targets close with an open choke; within 25 yards is ideal. At 25 yards, you will have a 40-inch spread with a cylinder choke. Open or Cylinder Chokes have no constriction at all. Patterns are shot with 2 3/4" ammunition in 3" chambers. The following average pattern percentages are expected in Browning barrels when shot with lead ammunition at 40 yards: DESCRIPTION. PATTERN PERCENTAGE. INVECTOR-DS CHOKE, 12, FULL. 75-80%. INVECTOR-DS CHOKE, 12, LIGHT FULL. 70-75%. INVECTOR-DS CHOKE, 12, …Yildiz shotguns typically use Beretta/Benelli Mobil style choke tubes, making it easier to find compatible chokes for your gun. Contents [ show] 1. Can I use other brands’ choke tubes in a Yildiz shotgun? Yes, as long as they are Beretta/Benelli Mobil style, they should be compatible with Yildiz shotguns. 2.Oct 11, 2011 ... A fixed-choke Remington shotgun barrel SHOULD have it marked on the left side of the barrel. Barrels which use choke tubes will obviously not ...These markings indicate Right barrel is “IMP CYL” and Left barrel is “MOD” Semi Auto Barrel Choke Markings This marking indicates the barrel is choked “SK”1108 posts · Joined 2005. #11 · Jul 4, 2007. Fastarget is correct. Merkel chokes tend to run tight. My 1620 is marked VBZ/1/2 (IC/Mod), but the chokes patterned more like Mod/Improved Mod. I opened the IC barrel to skeet and the left barrel remains a tight Mod. It makes for a pretty versatile gun.The choke tube table above shows the diameters and constrictionsyou can expect for choke tubes and shotgun barrels for Lanber 12-gaugecompared to common fixed choke shotgun gauges. Knowing the diameter of a choke tube is important in order to identify choke tubeconstriction. The tighter the choke tube, the more constriction it has and the less ... ….

Image 2: This illustration shows the different types of choke configurations; jug choking is at the top. Image 3: John Robinson uses both Briley and Mirochokes in this Miroku 9000. The difference in length results in the Briley’s protruding from the muzzle. Image 4: Miroku, Browning and a number of other shotgun makers use shorter screw-in ... Jan 23, 2023 · Arikara. Correct. For a while in the Flues era Ithaca marked the chokes as a fraction -- 1/4. 2/4, 3/4 & 4/4. Mine is marked 2 on the right tube and 4 on the left. Pretty much standard choke selections for general hunting purposes. Thanks for the photo. your gun is apparently older than mine. My sn begins with 372XXX. May 6, 2012 · Shotgun Choke Markings. A shotgun choke is found inside the bore of a shotgun barrel. It basically has a series of markings that helps shape the spread of the shot that is fired as it is coming out of the barrel. The specific choke you use determines the range and accuracy of the shot. Sep 11, 2023 · The choke tube markings on a Franchi 48/AL 28 gauge semiautomatic shotgun will usually be printed on the side of the choke tube with an identification letter. The letters commonly used are C (Cylinder), IC (Improved Cylinder), M (Modified), and IM (Improved Modified). Weeds can be a nuisance in any garden or lawn. They can quickly take over and choke out other plants, making it difficult to keep your garden looking its best. Fortunately, there a...A5 guy. Thanks for the confirmation on the chokes and the judgement on the Grade (>>Looks like a Diamond Grade. Nice gun!<<) When my uncle bought this gun almost 40 years ago at the Okinawa PX, he also bought a Browning Auto 5 at the same time. Small coincidence. Anyone else want to weigh in and confirm or deny the Diamond Grade hypothesis?17856 posts · Joined 2003. #1 · Oct 22, 2003. Anybody familiar with the choke markings on a SIG/Rizzini fixed choke O/U shotgun. Looks like they have "0"s stamped on the side of the barrels. One has 3 and the other 4 I think it is. The guy I got it from said it was an IC and Mod. The owners manual only speaks of choke tubes, and this gun has ...Examples. The most common number on a choke tube is the choke size or diameter. Both factory and aftermarket choke tubes will show the diameter of the choke etched into the outside wall of the choke. Additional numbers can include the shotgun gauge and brand specific markings.It is a 20 gauge with 3-inch chambers. The choke markings appear to be 14.9 stuck over 15.5 on the right and 14.6 struck over 15.5 on the left. Anyone know what this means in terms of IC< Mod, etc? ... and Mossberg shotguns brands. Come join the discussion about optics, hunting, gunsmithing, styles, reviews, accessories, classifieds, … Choke shotgun markings, We would like to show you a description here but the site won’t allow us., larryvaughn Discussion starter. 3 posts · Joined 2013. #1 · Jan 29, 2013. My new A71 came with 5 chokes and nary a word about how to identify them. Are the notches the same as Beretta; ie, 1notch=Full, 2=Improved modified, 3= Modified, 4=Improved cylinder, and 5= Cylinder? Old dog trying to learn new tricks., Shotgun choke does as it sounds. Chokes. That is, it constricts or narrows the barrels of a shotgun. This has the effect of reducing the pattern so that the density of the pellets is increased, which gives a stronger result. Visualise shotgun choke in the same way as a camera aperture which opens or reduces to give more or less light., Most double shotguns represented here. Double gun shotguns - Side by Side shotguns, and over under shotguns - Including drillings, double barreled rifles, SxS double rifles, combination guns. Makers - Darne, Merkel, Arrieta, Beretta, Browning, Holland, Purdey, Richards, Bernardelli, Parker, Fox, LC Smith, and most other double …, A shotgun barrel’s choke will be located at the muzzle end of the barrel and you will encounter them in two different designs. The oldest way is called a “fixed choke.”. Many side-by-side and older single barrels will have fixed chokes, meaning that their barrels have the choke constriction built-in to the end of the barrel at the muzzle end. , 2786 posts · Joined 2014. #2 · Nov 2, 2015. 2 and 4 would be modified and full. They would be the same as Ithaca guns since the Nitro Special is a Lefever in name only, Ithaca made all of them after acquiring Lefever - but I believe that you already knew that., Deciphering Auto 5 metric choke markings. I recently acquired a 16 ga. pre-War Auto 5 with a serial number in the 51,000 range. It does not appear to have the asterisk-style choke markings, but on the underside of the barrel it is marked as shown. I am assuming that this might represent a choke with a 0.1 mm constriction (16.9/17.0 mm)., The chokes in an L.C. Smith run parrallel for 1" and then taper 1 9/16" to bore size of .729-.732 in 12 ga. Also your gun was made in 1908, and after 1913 the 0 grade became Ideal Grade. The markings on the barrels are probably the barrel makers mark as the 0 grade had London Steel barrels or Damascus steel, I think Chain Damascus., Most double shotguns represented here. Double gun shotguns - Side by Side shotguns, and over under shotguns - Including drillings, double barreled rifles, SxS double rifles, combination guns. Makers - Darne, Merkel, Arrieta, Beretta, Browning, Holland, Purdey, Richards, Bernardelli, Parker, Fox, LC Smith, and most other double barreled shotgun, …, 6534 posts · Joined 2013. #9 · Jan 5, 2021. And just to note, before someone states the above specs are SAAMI and "do not apply" to a gun manufactured in either Belgium or Japan, where CIP reigns, the CIP specs for a 12-gauge barrel are 18.2mm+0.7mm, so 18.2-18.9mm. Which, math says are 0.71653" to 0.7440944"., To do this, you need a large piece of paper or cardboard placed at 40 yards. Draw a central aiming point and shoot at it from that distance. Find the center of the pattern on the target and draw a 30 inch circle. I do this by attaching a 15” string to a sharpie and holding the other end in the center of the pattern., The chokes in an L.C. Smith run parrallel for 1" and then taper 1 9/16" to bore size of .729-.732 in 12 ga. Also your gun was made in 1908, and after 1913 the 0 grade became Ideal Grade. The markings on the barrels are probably the barrel makers mark as the 0 grade had London Steel barrels or Damascus steel, I think Chain Damascus., A shotgun barrel’s choke will be located at the muzzle end of the barrel and you will encounter them in two different designs. The oldest way is called a “fixed choke.”. Many side-by-side and older single barrels will have fixed chokes, meaning that their barrels have the choke constriction built-in to the end of the barrel at the muzzle end., A choke is a valve installed in a carburetor that restricts air flow, which enriches the fuel-air mixture when an engine is started. According to Autorized.com, a choke is designed..., It is a 20 gauge with 3-inch chambers. The choke markings appear to be 14.9 stuck over 15.5 on the right and 14.6 struck over 15.5 on the left. Anyone know what this means in terms of IC< Mod, etc? ... and Mossberg shotguns brands. Come join the discussion about optics, hunting, gunsmithing, styles, reviews, accessories, classifieds, …, The choke tube table above shows the diameters and constrictions you can expect for choke tubes and shotgun barrels for Stoeger 12-gauge shotguns compared to common fixed choke shotgun gauges. Stoeger shotguns have two different choke systems. Some models are compatible with Beretta/Benelli Mobil style threads, while …, 145.1Kmembers. Since 2000. A forum community dedicated to Shotgun owners and enthusiasts including the Remington, Beretta, and Mossberg shotguns brands. Come join the discussion about optics, hunting, gunsmithing, styles, reviews, accessories, classifieds, and more! Show Less. Full Forum Listing., Mark’s Work Warehouse is a popular destination for individuals in search of high-quality workwear and accessories. With a wide range of products available, it can sometimes be over..., 8968 posts · Joined 2005. #1 · Mar 28, 2006. Beretta currently uses (or recently has used) 3 different choke tube types on different models of shotguns. They can be identified by the image below. Note that all the tubes pictured here are flush tubes. There are several styles of extended tubes with different styles of extension, but the part ..., I have recently obtained an older used CZ BRNO 12 gauge o/u ejector SG, MOD 501.2 manufactured around 1987-8. I’m trying to decipher the choke markings stamped on the base of the barrels. They are 17,4 ( top barrel) and 17,8 on the bottom. Could anyone please tell me how these equate to either UK choke markings, ie, Open, …, Feb 17, 2024 · Chokes allow shooters to adjust the shot pattern, making shotguns versatile for various shooting activities like hunting, skeet shooting, or trap shooting. 3. What do the markings on chokes mean? Markings on chokes indicate the level of constriction, with designations such as Cylinder, Improved Cylinder, Modified, Improved Modified, and Full. 4. , 1. Visual Method. The fastest way to identify the “Family” is to take down one choke you are currently using on your shotgun, clean it and cheek the markings on the side of the choke, here an example: In the example image, you see an Optima-Choke HP Choke. Note: Mobile-Choke “Family” could also be marked as “PB” or “ST”., Home. Shotgun choke chart by type, use and distance. Shotgun Choke Chart. From novice shooters to seasoned hunters, chokes are a critical component to getting the best out of your shotgun. Shotgun chokes are interchangeable tubes, installed at the end of a shotgun’s barrel that shape or narrow the shot pattern., The choke constricts the shot pattern, giving shooters the ability to customize their spread for different shooting scenarios. FAQs About Shotgun Chokes: 1. What is a shotgun choke? A shotgun choke is a device that narrows or constricts the bore at the muzzle, affecting the spread of the shot pattern., The Titan or the Poly-Choke will add a big gobbet of weight to the snout of your gun. The Poly-Choke II is heavier than the screw choke it replaces. The screw-in Tru-Glo Titan weighed 2-1/2 ounces, while the flush mount choke it replaced weighed 11/16 oz. I don’t know for sure what the non-vented Poly-Choke II weighs, but you should find out ..., The chokes on a Beretta BL3 shotgun can be identified by looking at the engravings on the side of the choke tube. The markings typically indicate the type of choke, such as “C” for cylinder, “IC” for improved cylinder, “M” for modified, and “F” for full. 1., A shotgun choke modifies how shot leaves the barrel, and therefore how it travels through the air. By picking the right choke, you can increase your chances of hitting a target. For a close proximity target a wider spread of shot is ideal, whereas at distance a tighter shot pattern is preferable. Close, moving targets require a more rapid response., The choke tube table above shows the diameters and constrictions you can expect for choke tubes and shotgun barrels for SKB 12-gauge shotguns compared to common fixed choke shotgun gauges. Knowing the diameter of a choke tube is important in order to identify choke tube constriction. The tighter the choke tube, the more …, Mar 6, 2011 ... Those markings are proof marks and the gauge and chamber size. 16 gauge - 2 3/4" chamber. Measure the barrels with calibers to find out what ..., To do this, shoot off a rest at a center mark in a 30-inch circle at 40 yards. Full choke should put 70 percent of the shot in the circle, modified 60 percent, improved cylinder 45 percent. Cylinder, or no choke at all, should shoot from 25 to 35 percent. With interchangeable choke tubes, a hunter can use the., A choke is simply a tapered constriction of the gun barrel’s bore at the muzzle end. The exit end of the choke is smaller by some dimension than the actual bore of the barrel. This difference is the amount of constriction. For example if the bore of the barrel is .730 and the exit dia of the choke is .710 you have a constriction of .020., The diameter table above shows the diameters and constrictions you can expect for choke tubes and shotgun barrels of a specific make and type, as well as 12-gauge choke sizes in inches, 10-gauge, 20-gauge, 16-gauge, 28-gaug e, and .410 shotguns. The most popular choke systems are shown, which include Standard …, Optima-Choke choke tubes will be marked Optima-Choke. The start of the threaded portion of the Optima-Choke tube is located a nominal 50.78 mm (2.00 inch) from the breech end of the choke tube. The length of the threaded portion is a nominal 15.9 mm (.625 inch). The major diameter of the choke tube thread is 20 mm (.787 inch).