Search results
Results from the WOW.Com Content Network
For handgun cartridges, with heavy bullets and light powder charges (a 9×19mm, for example, might use 5 grains (320 mg) of powder, and a 115 grains (7.5 g) bullet), the powder recoil is not a significant force; for a rifle cartridge (a .22-250 Remington, using 40 grains (2.6 g) of powder and a 40 grains (2.6 g) bullet), the powder can be the ...
130-grain (8.4 g) – soft point 150-grain (9.7 g) – round nose The next important change in the history of the rifle bullet occurred in 1882, when Lieutenant Colonel Eduard Rubin , director of the Swiss Army Laboratory at Thun, invented the copper-jacketed bullet — an elongated bullet with a lead core in a copper jacket.
A dram in the avoirdupois system is the mass of 1 ⁄ 256 pound or 1 ⁄ 16 ounce or 27.3 grains. The reasoning behind this archaic equivalence is that when smokeless powder first came out, some method of establishing an equivalence with common loads was needed in order to sell a box of cartridges.
It is commercially loaded with 0.224-inch (5.7 mm) diameter jacketed bullets, with weights ranging from 35 to 85 grains (2.27 to 5.8 g), with the most common loading by far being 55 gr (3.6 g). Ninety-grain and 95-grain (6.2 g) Sierra Matchking bullets are available for reloaders.
Rounds are available from 68-to-300-grain (4.4 to 19.4 g) with a common load being the standard military loading of a 230-grain (15 g) FMJ bullet (for comparison, the most common 9mm load is 115 grains (7.5 g), half the weight). Specialty rounds are available in weights under 100 grains (6.5 g) and over 260 grains (17 g); popular rounds among ...
Bullets weighing 2.6 g (40 grains) or less are recommended for optimal use in 5.7×28mm applications, [47] but the 228.6 mm (1:9 in) rifling twist rate (distance the bullet must travel to complete one full revolution) used in the firearms' barrels will stabilize bullets weighing up to 4.5 g (70 grains).
Using a ballistic calculator, they determined that a 55-grain bullet would have to be fired at 3,300 ft/s (1,006 m/s) to achieve the 500-yard performance necessary. [5] Robert Hutton (technical editor of Guns & Ammo magazine [clarification needed]) started development of a powder load to reach the 3,300 ft/s (1,006 m/s) goal. He used DuPont ...
Ammunition, also known as ammo, is the material fired, scattered, dropped, or detonated from any weapon or weapon system. [1] The term Ammunition includes both expendable weapons (e.g., bombs , missiles , grenades , land mines ), and the component parts of other weapons that create the effect on a target (e.g., bullets and warheads ).