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

42 published .378 Weatherby Magnum (Speer Reloading Manual #14) reloading recipes across 8 powders and 1 bullet manufacturers, with bullet weights from 250 to 300 grains and recorded velocities between 2,600 and 3,227 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
42
Powders
8
Bullet makers
1
Bullet weights
250–300 gr

Sample .378 Weatherby Magnum (Speer Reloading Manual #14) loads

The first 5 of 42 recipes.

BulletPowderChargeVelocityCOALPrimer
Speer Trophy Bonded Bear Claw SP 250grAccurate AAC-4350110.0 gr3,085 fps
Speer Trophy Bonded Bear Claw SP 250grAccurate AAC-4350104.0 gr2,882 fps
Speer Trophy Bonded Bear Claw SP 250grHodgdon H-4350102.0 gr2,930 fps
Speer Trophy Bonded Bear Claw SP 250grHodgdon H-4350108.0 gr3,097 fps
Speer Trophy Bonded Bear Claw SP 250grIMR IMR-4350105.0 gr3,007 fps

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