.257 Weatherby Magnum (P.O. Ackley Data) Load Data

15 published .257 Weatherby Magnum (P.O. Ackley Data) reloading recipes across 6 powders, with bullet weights from 87 to 120 grains and recorded velocities between 3,208 and 3,762 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
6
Bullet makers
0
Bullet weights
87–120 gr

Sample .257 Weatherby Magnum (P.O. Ackley Data) loads

The first 5 of 15 recipes.

BulletPowderChargeVelocityCOALPrimer
100grIMR IMR-406453.0 gr3219 fps——
100grIMR IMR-432056.0 gr3338 fps——
100grIMR IMR-435066.0 gr3592 fps——
100grIMR IMR-483168.0 gr3461 fps——
100grIMR IMR-489556.0 gr3322 fps——

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Powders used in .257 Weatherby Magnum (P.O. Ackley Data) load data

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