.338-378 Weatherby Magnum (using Sierra bullets) Load Data

59 published .338-378 Weatherby Magnum (using Sierra bullets) reloading recipes across 3 powders and 1 bullet manufacturers, with bullet weights from 215 to 300 grains and recorded velocities between 2,409 and 3,270 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
59
Powders
3
Bullet makers
1
Bullet weights
215–300 gr

Sample .338-378 Weatherby Magnum (using Sierra bullets) loads

The first 5 of 59 recipes.

BulletPowderChargeVelocityCOALPrimer
Sierra SBT 215grHodgdon H-1000104.0 gr2859 fps——
Sierra SBT 215grHodgdon H-1000106.0 gr2946 fps——
Sierra SBT 215grHodgdon H-1000108.0 gr3037 fps——
Sierra SBT 215grHodgdon H-1000110.0 gr3132 fps——
Sierra SBT 215grHodgdon H-1000102.0 gr2776 fps——

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