338-378 Weatherby Magnum Load Data

99 published 338-378 Weatherby Magnum reloading recipes across 18 powders and 8 bullet manufacturers, with bullet weights from 160 to 300 grains and recorded velocities between 2,506 and 3,713 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
99
Powders
18
Bullet makers
8
Bullet weights
160–300 gr

Sample 338-378 Weatherby Magnum loads

The first 5 of 99 recipes.

BulletPowderChargeVelocityCOALPrimer
BAR TSX-FB 160grHodgdon H1000116.0–120.0 gr3374.0–3478 fps3.650Federal 215M, Large Rifle Magnum Match
BAR TSX-FB 160grHodgdon H41498.0–104.0 gr3371.0–3593 fps3.650Federal 215M, Large Rifle Magnum Match
BAR TSX-FB 160grHodgdon H435099.0–106.0 gr3387.0–3610 fps3.650Federal 215M, Large Rifle Magnum Match
BAR TSX-FB 160grHodgdon H4831107.0–114.0 gr3357.0–3583 fps3.650Federal 215M, Large Rifle Magnum Match
Barnes TTSX FB 160grIMR IMR 7828ssc108.0–115.0 gr3376.0–3671 fps3.750Federal GM215M

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