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2. Handloading - Wikipedia

   en.wikipedia.org/wiki/Handloading

   Components of a modern bottleneck rifle cartridge. Top-to-bottom: Copper-jacketed bullet, smokeless powder granules, rimless brass case, Boxer primer.. Handloading, or reloading, is the practice of making firearm cartridges by manually assembling the individual components (metallic/polymer case, primer, propellant and projectile), rather than purchasing mass-assembled, factory-loaded ...

3. Magazine (firearms) - Wikipedia

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

   The earliest firearms were loaded with loose powder and a lead ball, and to fire more than a single shot without reloading required multiple barrels, such as in pepper-box guns, double-barreled rifles, double-barreled shotguns, or multiple chambers, such as in revolvers. The main problem with these solutions is that they increase the bulk and ...

4. Overall length - Wikipedia

   en.wikipedia.org/wiki/Overall_length

   The overall length (OAL) of an ammunition cartridge is a measurement from the base of the brass shell casing to the tip of the bullet, seated into the brass casing. Cartridge overall length, or "COL", is important to safe functioning of reloads in firearms.

5. Gas-operated reloading - Wikipedia

   en.wikipedia.org/wiki/Gas-operated_reloading

   Gas-operated firearm (long-stroke piston, e.g. AK-47).1) gas port, 2) piston head, 3) rod, 4) bolt, 5) bolt carrier, 6) spring. Gas-operation is a system of operation used to provide energy to operate locked breech, autoloading firearms.

6. Headspace (firearms) - Wikipedia

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

   Headspace positioning of rimless, rimmed, belted and straight cartridges Several different rimmed, .22 rimfire cartridges, which have a uniform forward diameter, and which have headspace on the rim, allowing any length of cartridge shorter than the maximum size to be used in the same firearm Firearms chambered for tapered rimmed cartridges like this .303 British cannot safely fire shorter ...

7. Sectional density - Wikipedia

   en.wikipedia.org/wiki/Sectional_density

   In Europe the derivative unit g/cm 2 is also used in literature regarding small arms projectiles to get a number in front of the decimal separator. [ citation needed ] As an example, a bullet with a mass of 160 grains (10.4 g) and a diameter of 0.264 in (6.7 mm), has a sectional density ( SD ) of:

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9. Coal breaker - Wikipedia

   en.wikipedia.org/wiki/Coal_breaker

   In 1935, the first dense-media separator was introduced. [1] In these wet separators, a very dense medium (such as magnetite) is introduced into an agitated mixture of coal and water. [34] The dense media drops to the bottom of the tank, sending water and the lighter material (such as coal) over the top for collection and drying. [34]