10 published .458 Winchester Magnum (Somchem Data) reloading recipes across 3 powders and 2 bullet manufacturers, with bullet weights from 400 to 500 grains and recorded velocities between 1,886 and 2,474 fps. Every load lists charge weight, velocity, COAL, primer and case where the source published it.
The first 5 of 10 recipes.
| Bullet | Powder | Charge | Velocity | COAL | Primer |
|---|---|---|---|---|---|
| Speer FN 400gr | Somchem S321 | 77.3 gr | 2372 fps | — | — |
| Speer FN 400gr | Somchem S321 | 81.3 gr | 2474 fps | — | — |
| Speer FN 400gr | Somchem S341 | 77.5 gr | 2031 fps | — | — |
| Speer FN 400gr | Somchem S341 | 81.5 gr | 2126 fps | — | — |
| Hornady FMJ 500gr | Somchem S321 | 67.8 gr | 2044 fps | — | — |
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