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2. 20-gauge shotgun - Wikipedia

   en.wikipedia.org/wiki/20-gauge_shotgun

   The 20- gauge shotgun, also known as 20 bore, is a type of smoothbore shotgun. 20-gauge shotguns have a bore diameter of .615 in (15.6 mm), while the 12-gauge has a bore diameter of .729 in (18.5 mm). [2] 12-gauge and 20-gauge shotguns are the most popular gauges in the United States. [3][4] The 20-gauge is popular among upland game hunters ...

3. Gauge (firearms) - Wikipedia

   en.wikipedia.org/wiki/Gauge_(firearms)

   The gauge (in American English or more commonly referred to as bore in British English) of a firearm is a unit of measurement used to express the inner diameter (bore diameter) of the barrel. Gauge is determined from the weight of a solid sphere of lead that will fit the bore of the firearm and is expressed as the multiplicative inverse of the ...

4. Recoil - Wikipedia

   en.wikipedia.org/wiki/Recoil

   In most cases, a gun is very close to a free-recoil condition, since the recoil process generally lasts much longer than the time needed to move the ejecta down the barrel. An example of near zero-recoil would be a gun securely clamped to a massive or well-anchored table, or supported from behind by a massive wall.

5. Recoil operation - Wikipedia

   en.wikipedia.org/wiki/Recoil_operation

   An alternative design concept for recoil-operated firearms is the inertia operated system, the first practical use of it being the Sjögren shotgun, developed by Carl Axel Theodor Sjögren in the early 1900s, a Swedish engineer who was awarded a number of patents for his inertia operated design between 1900 and 1908 and sold about 5,000 ...

6. Remington Model 11-48 - Wikipedia

   en.wikipedia.org/wiki/Remington_Model_11-48

   The Model 11-48 is a long- recoil operated semi-automatic shotgun based on the Model 11, itself based on an 1898 design by John Browning. Shells are stored in a tubular magazine under the barrel. When a chambered shell is fired, the barrel and bolt recoiling together (for a distance greater than the shell length) re-cock the hammer, eject the ...

7. Free recoil - Wikipedia

   en.wikipedia.org/wiki/Free_recoil

   Free recoil / Frecoil is a vernacular term or jargon for recoil energy of a firearm not supported from behind. Free recoil denotes the translational kinetic energy ( E t ) imparted to the shooter of a small arm when discharged and is expressed in joules (J), or foot-pound force (ft·lb f ) for non-SI units of measure.

8. Table of handgun and rifle cartridges - Wikipedia

   en.wikipedia.org/wiki/Table_of_handgun_and_rifle...

   Table of handgun and rifle cartridges. Common rifle cartridges, from the largest .50 BMG to the smallest .22 Long Rifle with a $1 United States dollar bill in the background as a reference point. This is a table of selected pistol / submachine gun and rifle / machine gun cartridges by common name. Data values are the highest found for the ...

9. Shotgun - Wikipedia

   en.wikipedia.org/wiki/Shotgun

   Shotgun. A shotgun (also known as a scattergun, peppergun, [1] or historically as a fowling piece) is a long-barreled firearm designed to shoot a straight-walled cartridge known as a shotshell, which discharges numerous small spherical projectiles called shot, or a single solid projectile called a slug.