.300 Winchester Magnum (IMR Data) Load Data

12 published .300 Winchester Magnum (IMR Data) reloading recipes across 3 powders and 3 bullet manufacturers, with bullet weights from 150 to 180 grains and recorded velocities between 2,880 and 3,136 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
12
Powders
3
Bullet makers
3
Bullet weights
150–180 gr

Sample .300 Winchester Magnum (IMR Data) loads

The first 5 of 12 recipes.

BulletPowderChargeVelocityCOALPrimer
Sierra SP 150grIMR IMR-435068.0 gr3,096 fps——
Sierra SP 150grIMR IMR-483171.5 gr3,136 fps——
Sierra SP 150grIMR IMR-782879.0 gr3,134 fps——
Nosler Partition 165grIMR IMR-435071.5 gr3,110 fps——
Nosler Partition 165grIMR IMR-483173.0 gr3,100 fps——

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