378 Weatherby Magnum Load Data

51 published 378 Weatherby Magnum reloading recipes across 18 powders and 8 bullet manufacturers, with bullet weights from 235 to 350 grains and recorded velocities between 2,430 and 3,309 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
51
Powders
18
Bullet makers
8
Bullet weights
235–350 gr

Sample 378 Weatherby Magnum loads

The first 5 of 51 recipes.

BulletPowderChargeVelocityCOALPrimer
Speer Speer 235grIMR 4350109 gr3,179 fpsFederal 215
Speer Speer 235grIMR 4831119 gr3,286 fpsFederal 215
SPR SP 235grHodgdon H4350102.0–109.0 gr3003.0–3224 fps3.645Federal 215, Large Rifle Magnum
SPR SP 235grHodgdon H4831107.0–117.0 gr2972.0–3202 fps3.645Federal 215, Large Rifle Magnum
Barnes TSX FB 235grHodgdon H4831sc107.0–115.0 gr2914.0–3169 fpsFed GM215M

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