.257 Weatherby Magnum (Lee Precision Data) Load Data

82 published .257 Weatherby Magnum (Lee Precision Data) reloading recipes across 9 powders and 1 bullet manufacturers, with bullet weights from 75 to 120 grains and recorded velocities between 2,941 and 3,900 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
82
Powders
9
Bullet makers
1
Bullet weights
75–120 gr

Sample .257 Weatherby Magnum (Lee Precision Data) loads

The first 5 of 82 recipes.

BulletPowderChargeVelocityCOALPrimer
Jacketed 100grAccurate AAC-310069.0 gr3461 fps3.180
Jacketed 100grAccurate AAC-310065.6 gr3253 fps3.180
Jacketed 100grAccurate AAC-435059.4 gr3301 fps3.180
Jacketed 100grAccurate AAC-435062.5 gr3512 fps3.180
Jacketed 100grAccurate AAC-870085.5 gr3173 fps3.180

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