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The .30-06 Springfield cartridge case can hold 68.2 grains and has a volume of 4.42 millilitres (0.270 in 3). The exterior shape of the case was designed to promote reliable case feeding and extraction in bolt-action rifles and machine guns alike, under extreme conditions. [citation needed].30-06 Springfield maximum C.I.P. cartridge dimensions.
Thus the optimum rate of twist for this bullet should be approximately 12 inches per turn. The typical twist of .30-06 caliber rifle barrels is 10 inches per turn, accommodating heavier bullets than in this example. A different twist rate often helps explain why some bullets work better in certain rifles when fired under similar conditions.
P.O. Ackley was a notable gunsmith famous for developing wildcat cartridges from parent cartridges like the 30-06 Springfield. For many of the wildcats listed above, and several of standardized commercial chamberings based on the 30-06 cartridge, there are "Ackley Improved" versions with sharper shoulders increasing case capacity. [25]
The M196 tracer cartridge (54-grain bullet) 5.56×45mm NATO was developed for the original M16 rifle and is compatible with the M16A1 barrel also using 1:12 rifling twist. It has a red tip and is designed to trace out to 500 yards, and its trajectory matches the M193 (56-grain) ball cartridge, which has no tip color.
The round itself was based on the .30-03, but rather than a 220-grain (14 g) round-tip bullet fired at 2,300 ft/s (700 m/s), it had a 150-grain (9.7 g) pointed bullet fired at 2,800 ft/s (850 m/s); the case neck was a fraction of an inch shorter as well. The new American cartridge was designated Cartridge, Ball, Caliber .30, Model of 1906.
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As a result, a 15” Encore pistol chambered in the .30-06 JDJ can safely equal the performance of a 24” rifle in the .30-06 Springfield. [1] Quality Cartridge offers headstamped brass for the .30-06 JDJ, which can also be fireformed using standard .30-06 cases. SSK Industries currently offers Hornady Custom Dies for the chambering.