.257 Arch (P.O. Ackley Data) Load Data

16 published .257 Arch (P.O. Ackley Data) reloading recipes across 6 powders, with bullet weights from 60 to 160 grains and recorded velocities between 2,672 and 4,284 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
16
Powders
6
Bullet makers
0
Bullet weights
60–160 gr

Sample .257 Arch (P.O. Ackley Data) loads

The first 5 of 16 recipes.

BulletPowderChargeVelocityCOALPrimer
100grIMR IMR-483154.0 gr3358 fps——
117grIMR IMR-483152.5 gr3174 fps——
120grHodgdon H-87061.0 gr2932 fps——
120grIMR IMR-483151.0 gr3031 fps——
160grHodgdon H-87061.5 gr2672 fps——

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