.300 Winchester Magnum (Somchem Data) Load Data

28 published .300 Winchester Magnum (Somchem Data) reloading recipes across 3 powders and 1 bullet manufacturers, with bullet weights from 150 to 220 grains and recorded velocities between 2,318 and 3,229 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
28
Powders
3
Bullet makers
1
Bullet weights
150–220 gr

Sample .300 Winchester Magnum (Somchem Data) loads

The first 5 of 28 recipes.

BulletPowderChargeVelocityCOALPrimer
Speer SP 150grSomchem S36179.0 gr3121 fps——
Speer SP 150grSomchem S36171.1 gr2362 fps——
Speer SP 150grSomchem S36563.9 gr2786 fps——
Speer SP 150grSomchem S36571.0 gr3229 fps——
PMP SP 168grSomchem S36168.3 gr2737 fps——

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