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The 7×57mm Mauser Ackley Improved is an alternate version of the 7×57mm Mauser cartridge with 40 degree shoulder. This wildcat was designed to be easily made by rechambering existing firearms, and fire forming the ammunition to decrease body taper and increase shoulder angle, resulting in a higher case capacity with the trade-off of a smaller ...
Parker Otto Ackley (May 25, 1903 – August 23, 1989) [1] was an American gunsmith, barrel maker, author, columnist, and wildcat cartridge developer. The Ackley Improved family of wildcat cartridges are designed to be easily made by rechambering existing firearms, and fireforming the ammunition to decrease body taper and increase shoulder angle, resulting in a higher case capacity.
P.O. Ackley favored short .30 caliber magnums and called it "highly recommended." Performance with a 150-grain (9.7 g) bullet is up to 3,590 ft/s (1,090 m/s), with a 180-grain (12 g) bullet is up to 3,200 ft/s (980 m/s) and with a 220-grain (14 g) bullet is up to 2,705 ft/s (824 m/s).
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.
According to the book “Du und dein Heer"(1943) the regular s.S. projectile had the following penetration performance: 65 cm (26 in) of dry pine wood at 100 m (109 yd), 85 cm (33 in) at 400 m (437 yd), 45 cm (18 in) at 800 m (875 yd) and 20 cm (8 in) at 1,000 m (1,094 yd), 10 mm (0.39 in) of iron at 300 m (328 yd), 7 mm (0.28 in) at 550 m (601 ...
7×65mmR; Specifications; Case type: Rimmed, bottlenecked: Bullet diameter: 7.25 mm (0.285 in) Neck diameter: 7.95 mm (0.313 in) Shoulder diameter: 10.80 mm (0.425 in)
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Brazilian soldiers in 2013 with Mauser 1935 or 08/34 short rifles. The 7mm Mauser-made Model 1935 rifle was similar to the Model 1908 but featured grasping grooves. [5] A short rifle variant also existed. [6]