.257 Weatherby Magnum (Speer Reloading Manual #14) Load Data

54 published .257 Weatherby Magnum (Speer Reloading Manual #14) reloading recipes across 11 powders and 1 bullet manufacturers, with bullet weights from 87 to 120 grains and recorded velocities between 2,904 and 3,731 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
54
Powders
11
Bullet makers
1
Bullet weights
87–120 gr

Sample .257 Weatherby Magnum (Speer Reloading Manual #14) loads

The first 5 of 54 recipes.

BulletPowderChargeVelocityCOALPrimer
Speer Spitz SP, HP or Spitz BTSP 100grHodgdon H-100071.0 gr3405 fps
Speer Spitz SP, HP or Spitz BTSP 100grHodgdon H-100069.0 gr3302 fps
Speer Spitz SP, HP or Spitz BTSP 100grIMR IMR-782867.0 gr3306 fps
Speer Spitz SP, HP or Spitz BTSP 100grIMR IMR-782869.0 gr3447 fps
Speer Spitz SP, HP or Spitz BTSP 100grRamshot Magnum70.0 gr3339 fps

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