Load Specifications
Load data in caliber .458 SOCOM with .458 | 250gr | CutEdge DGBR-HP bullet and 5 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are SNPE Vectan BA6 1/2, ReloadSwiss RS 14 and Hodgdon TrailBoss.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Hodgdon LilGun | <<locked>> | 86% | 31,328 psi | 90% | 2051 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 23,221 psi | 66% | 1283 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 21,930 psi | 63% | 1306 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 29,399 psi | 84% | 1883 fps | 98.6% |
| Vihtavuori N110 | <<locked>> | 94% | 30,980 psi | 89% | 1955 fps | 97.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Hodgdon LilGun | <<locked>> | 80% | 25,483 psi | 73% | 1919 fps | 96% |
| Hodgdon TrailBoss | 10.9 gr | 80% | 16,462 psi | 47% | 1138 fps | 100% |
| ReloadSwiss RS 14 | 11.1 gr | 80% | 15,708 psi | 45% | 1161 fps | 100% |
| SNPE Vectan BA6 1/2 | 29.3 gr | 88% | 21,495 psi | 61% | 1693 fps | 95.3% |
| Vihtavuori N110 | <<locked>> | 88% | 25,860 psi | 74% | 1847 fps | 95.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 5 powders for .458 SOCOM loaded with the .458 | 250gr | CutEdge DGBR-HP. Hodgdon LilGun delivers the highest muzzle velocity at 2,051 fps; across all powders the maximum-charge window runs from 1,283 fps to 2,051 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 5 of the 5 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (241 MPa), the top charges use 63–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, SNPE Vectan BA6 1/2 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. SNPE Vectan BA6 1/2, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for .458 SOCOM with the .458 | 250gr | CutEdge DGBR-HP they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.