.458 Winchester Magnum (Speer Reloading Manual #14) Load Data

58 published .458 Winchester Magnum (Speer Reloading Manual #14) reloading recipes across 18 powders and 1 bullet manufacturers, with bullet weights from 350 to 500 grains and recorded velocities between 1,262 and 2,593 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
58
Powders
18
Bullet makers
1
Bullet weights
350–500 gr

Sample .458 Winchester Magnum (Speer Reloading Manual #14) loads

The first 5 of 58 recipes.

BulletPowderChargeVelocityCOALPrimer
Speer MT SP 350grAccurate AAC-201577.0 gr2560 fps——
Speer MT SP 350grAccurate AAC-201573.0 gr2419 fps——
Speer MT SP 350grAccurate AAC-223082.0 gr2499 fps——
Speer MT SP 350grAccurate AAC-223086.0 gr2593 fps——
Speer MT SP 350grAccurate AAC-246075.0 gr2261 fps——

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