.284 Winchester is faster at the top of its range (3,000 vs 2,900 fps); .284 Winchester carries more energy at its hottest load (2,900 vs 2,800 ft·lb). Both figures are range maxima; typical loads run lower.
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At the top of the range, .284 Winchester is faster — 3,000 fps versus 2,900. Real velocity depends on the specific load and barrel length, so check individual factory loads before you decide.
Which hits harder, .284 Winchester or 7mm Mauser?
.284 Winchester carries more muzzle energy at its top load (2,900 vs 2,800 ft·lb). Energy alone doesn't decide terminal effect, though — bullet construction and placement matter more.
Lindcott Armory