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Winchester offered factory loaded .256 Magnum ammunition (and brass to reloaders) into the beginning of the 1990s. Winchester .256 factory loads used a 60 grain Open Point Expanding bullet at a MV of 2760 fps and ME of 1015 ft. lbs. from a 24-inch rifle barrel. That is about 500 fps faster than Winchester factory loads for the old .25-20 cartridge.
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 cartridge, and might not occur in the same load ...
The ballistic properties of the .460 Steyr and the 12.7 × 99 mm are largely similar. [ 3 ] The ammunition is also comparable to other special cartridges such as the .408 Chey Tac or the .416 Barrett, which were also developed as special calibers for precision rifles in order to be able to work over long distances.
The 6.5mm Grendel is an intermediate cartridge jointly designed by British-American armorer Bill Alexander, competitive shooter Arne Brennan (of Houston, Texas) and Lapua ballistician Janne Pohjoispää, as a low-recoil, high-precision rifle cartridge specifically for the AR-15 platform at medium/long range (200–800 yard).
Barrett claims that this cartridge is capable of propelling a 398 gr solid brass boattail spitzer bullet out of the 32-inch (810 mm) barrel of a Model 99 single-shot rifle at 960 m/s (3,150 ft/s), giving it a ballistic coefficient of .720, and keeping the projectile supersonic out to 1,737 meters (1,900 yards, ~1.2 miles). [citation needed]
The .338 17.5 gram (270 gr) Lost River Ballistic Technologies J40 match bullet made out of a copper-nickel alloy is one of the most aerodynamic .338 calibre bullets available. It has an 1,800 m (1,970 yd) supersonic range under optimal warm summer conditions at a muzzle velocity of 869 m/s (2,850 ft/s).
The 300 gr (19 g) ammunition has a bullet trajectory similar to that of the .308 Winchester firing a 180 gr (12 g) bullet. The trajectory allows for a MPBR of about 245 yd (224 m) when zeroed in for 210 yd (190 m). Hornady new Superformance line of cartridges provides a leap in performance to the .375 H&H cartridge.
When sighted in for 300 yd (270 m) the bullet of Weatherby's N257115BST ammunition has only dropped 21.9 in (56 cm) at 500 yd (460 m) and retains 1,347 ft⋅lbf (1,826 J) energy. Compared to the Winchester's .270 WSM SXP270S ammunition show a bullet drop of 24.5 in (62 cm) but retains 1,552 ft⋅lbf (2,104 J).