Contemporary Use
For open country hunting of deer and pronghorn, the .284 Winchester loaded with the Speer 130-grain (8.4 g) spitzer at 3,100 ft/s (940 m/s) will do anything the .270 Winchester will do and it will do it in a short action rifle. Larger game calls for bullets weighing from 150 to 160 grains (10 g). H4831, H450, H4350, H414, IMR-4350, and IMR-4831 are excellent powders for the .284 Winchester.
These ballistics make it clear that the .284 Winchester is as good as the .280 Remington with the same weight bullet. Of course the short, handy mountain rifles for which the .284 Winchester seems best suited seldom come with 24-inch barrels. Aside from Winchester, no other major company has ever loaded factory ammunition for the .284 Winchester.
The cartridge is sometimes used for long range target shooting like F-Class and 1000 yd/m long range competitions, where participants usually handload their ammunition. For this application the .284 Winchester is loaded with 175 and 180 gr very-low-drag bullets.
The .284 Winchester is not popular in Europe, where it competes with the 7x64mm, to which it is almost ballistically identical. When compared to the .284 Winchester the 7×64mm has a lower C.I.P. maximum allowed chamber pressure and as a European 7 mm cartridge has a slightly larger bore. European 7 mm cartridges all have 7.24 mm (0.285 in) grooves Ø diameter. American 7 mm cartridges have 7.21 mm (0.284 in) grooves Ø.
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