.257 Weatherby Magnum (A-Square Data) Load Data

15 published .257 Weatherby Magnum (A-Square Data) reloading recipes across 3 powders and 2 bullet manufacturers, with bullet weights from 85 to 117 grains and recorded velocities between 3,029 and 3,749 fps. Every load lists charge weight, velocity, COAL, primer and case where the source published it.

Always begin at the minimum charge weight and work up gradually. Never exceed maximum loads. Verify all data against a current published reloading manual before use. LoadDevelopment.com is not responsible for errors or omissions in this data.
Recipes
15
Powders
3
Bullet makers
2
Bullet weights
85–117 gr

Sample .257 Weatherby Magnum (A-Square Data) loads

The first 5 of 15 recipes.

BulletPowderChargeVelocityCOALPrimer
Hornady Spire Point Boat Tail 117grHodgdon H-483169.0 gr3299 fps——
Hornady Spire Point Boat Tail 117grHodgdon H-483164.0 gr3029 fps——
Hornady Spire Point Boat Tail 117grIMR IMR-483166.0 gr3342 fps——
Hornady Spire Point Boat Tail 117grIMR IMR-483167.0 gr3385 fps——
Hornady Spire Point Boat Tail 117grIMR IMR-483161.0 gr3101 fps——

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