I would suggest that you look for any markings on them to identify the size. Starting at the brass, the layers of a shotgun shell are brass, propellant, over-powder wad, shot wad, shot pellets (or slug), over-shot wad, and top crimping. Notably, some .22 LR match rifles have a constricted bore diameter near the muzzle. Image 2: This illustration shows the different types of choke configurations; jug choking is at the top. 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. L13. I bought a universal choke gauge through Shotgun Sports Magazine, which covers 12/16/20/28 ans .410 measurements, for just this time of situation. Without the correct choke, the pattern may be too sparse and the targets could pass through without being struck by a pellet. Shotgun Gauges Explained: 10 vs 12 vs 16 vs 20 vs 28 vs 410 ... You’ll still occasionally run into boxes still bearing dram equivalent markings, but they’re getting less and less common. 1988-> “DA” and the last numbers of the year. The larger the number, the smaller the shell diameter. Understanding Shotgun Chokes A brief explanation by Briley. Although we can not pinpoint the full story, it is believed that the shotgun choke was invented in Rhode Islandin the early- to mid-19th century by a gunsmith, Jeremiah Smith. 8 Mar 2019; Do you know what length your chamber is? Most 16 gauges use the Standard Invector system, with the exception of the current A5 Sweet 16, which uses the Invector-DS system. Shotgun Cartridges Explained . The shotgun gauges manufactured today are: 10, 12, 16, 20, 28 and.410 bore. These fit only shotguns marked Invector or Standard Invector. The majority of marks will be found on the barrel flats, though early guns may have stamps on the tubes, under the forend. If you are new to shooting and do not understand shotgun chokes, do not be surprised. Chokes are most commonly seen on shotguns, but are also used on some rifles, pistols, or even airguns. Shotgun cartridges are a relatively simple thing. Let us start at the beginning. Welcome Thank you for visiting our on-line listing of manufacturers identifying marks, referred to more commonly as "Proof Marks", "Arsenal" or "Inspector Marks". Shotguns are also capable of firing a single projectile, called a ‘slug’. London. On July 14, 1868, an inventor from Boston created the first patented “detachable muzzles for shotguns.” These chokes would be screwed on the outside of the barrel and were not fixed. Brownells Gun Tech Steve Ostrem fills us in on some of the very basics of Shotgun Choke tubes. B2. Adjustable Shotgun Recoil Pad And Shotgun Choke Markings Explained Best Buy 2019 Ads, Deals and Sales. In order to handle a higher volume of steel shot shells used in field hunting, the Optima-Choke tube was revised and manufactured with a thicker wall size. When they were made, all British guns had to be subjected to proof testing (they still are) to ensure that they were fit for purpose. Birmingham. Captions Image 1: Chokes are vital for controlling the pattern of the shot, especcially for clay/skeet shooting. Here we have tested improved cylinder, modified, improved modified and full Chokes. If the answers were “no” then read on, as this article will explain the jargon! B1. Bob _____ A shotgun shell is cased in plastic with a brass base containing the primer. Do you know if you need a “28 gram, 6, Fibre” or a “36 gram, 4, Plastic”? Birmingham. 1813-1904. Seventy five percent of shotgun shooters that have shot for many years do not understand shotgun chokes either. Lets be clear here: dram equivalents should only be used for a general comparison between two different shotgun loads. From 1855 definitive black powder proof for all guns with B3. @Find out more "Today, if you do not want to disappoint, Check price before the Price Up. Gun Barrel Proof Marks. They never fit shotguns marked Invector Plus (+) or Invector-DS. Generally, the first number on the top of the box identifies the gauge of the shells in the box. The construction of a cartridge is completed with just 5 components and when most people are out shooting, they don’t give their cartridges a second thought. I have seen a couple of the Yildiz shotguns but true fully I haven't handled the choke tubes. Markings on gun barrels and other gun components that indicate the level of pressure, calibre and standards that a weapon is fit for in service.. Good way to also check how close the ones you think you know, really are. With the introduction of the model 391 Xtrema shotguns in 2003 the Optima barrel configuration was added into the 391 12-gauge line of field shotguns. For magazine shotguns with a restricted magazine capability. [citation needed]Chokes are almost always used with modern hunting and target shotguns to improve performance. tapered constriction of a shotgun barrel’s bore at the muzzle end rules, regulations and scales, made in the month of april 2006 by the gunmakers' company and the guardians of the birmingham proof house “DA” stands for “DeActivaded”. In firearms, a choke is a tapered constriction of a gun barrel at the muzzle end. Year denotes the year of deactivation. MARKINGS & DESIGNATIONS... German Manufacturing Codes of Occupied Countries during World War 2 These codes may be found on various wartime small arms manufactured in Nazi-occupied Europe during WW2. Year denotes the year of change. 10 ga., 28 ga. and .410 bore Browning shotguns always utilize the Standard Invector system. Gauge is a measurement of the diameter of the shell case. There is some reference to books predating these inventions in Spain; however, lit…