.458 Winchester Magnum in a Model 70 Load Data

43 published .458 Winchester Magnum in a Model 70 reloading recipes across 9 powders and 4 bullet manufacturers, with bullet weights from 300 to 500 grains and recorded velocities between 1,897 and 2,367 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
43
Powders
9
Bullet makers
4
Bullet weights
300–500 gr

Sample .458 Winchester Magnum in a Model 70 loads

The first 5 of 43 recipes.

BulletPowderChargeVelocityCOALPrimer
Sierra HP 300grHodgdon H-419863.0 gr2,142 fps——
Sierra HP 300grIMR IMR-419862.0 gr2,313 fps——
Sierra HP 300grIMR IMR-419858.0 gr2,261 fps——
Sierra HP 300grIMR IMR-419863.0 gr2,367 fps——
Sierra HP 300grIMR IMR-432065.0 gr2,015 fps——

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