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257 Weatherby Magnum Ammo

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  • 257 Weatherby Magnum
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257 Weatherby Magnum ammo comes in bullet weights of 90 to 120 grains. The most popular and commercially available bullet weights are 90, 100 and 115 grains. A 257 load with a 100 to 120 grain bullet is recommended for medium game out to about 300 yards. Performance ballistics for 90, 100 and 115 grain 257 Weatherby loads are found in the following table.

257 WEATHERBY MAGNUM VELOCITY
100 yd 200 yd 300 yd 400 yd 500 yd
90 gr 3,184 ft/s 2,848 ft/s 2,537 ft/s 2,246 ft/s 1,974 ft/s
100 gr 3,298 ft/s 3,016 ft/s 2,752 ft/s 2,503 ft/s 2,267 ft/s
115 gr 3,170 ft/s 2,953 ft/s 2,746 ft/s 2,549 ft/s 2,360 ft/s
257 WEATHERBY MAGNUM ENERGY
100 yd 200 yd 300 yd 400 yd 500 yd
90 gr 2,026 ft⋅lb 1,621 ft⋅lb 1,286 ft⋅lb 1,008 ft⋅lb 779 ft⋅lb
100 gr 2,416 ft⋅lb 2,020 ft⋅lb 1,682 ft⋅lb 1,391 ft⋅lb 1,141 ft⋅lb
115 gr 2,566 ft⋅lb 2,227 ft⋅lb 1,926 ft⋅lb 1,659 ft⋅lb 1,422 ft⋅lb

Disclaimer: Actual velocity and energy ballistics may vary.