.300 Winchester Magnum (Long-Throated) Load Data

15 published .300 Winchester Magnum (Long-Throated) reloading recipes across 3 powders and 2 bullet manufacturers, with bullet weights from 150 to 220 grains and recorded velocities between 2,833 and 3,594 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
15
Powders
3
Bullet makers
2
Bullet weights
150–220 gr

Sample .300 Winchester Magnum (Long-Throated) loads

The first 5 of 15 recipes.

BulletPowderChargeVelocityCOALPrimer
Nosler Mag. 150grIMR IMR-435081.0 gr3,503 fps—CCI 250 Magnum
Nosler Mag. 150grIMR IMR-483186.0 gr3,509 fps—CCI 250 Magnum
Nosler Mag. 150grNorma N-20586.0 gr3,594 fps—CCI 250 Magnum
Nosler Mag. 165grIMR IMR-435079.0 gr3,363 fps—CCI 250 Magnum
Nosler Mag. 165grIMR IMR-483184.0 gr3,406 fps—CCI 250 Magnum

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