Load Specifications
Load data in caliber .458 Win.Mag. with .458 | 308gr | CutEdge ESP Raptor bullet and 28 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Shooters World Buffalo Rifle, Lovex D060 and ReloadSwiss RS 36.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 98% | 53,287 psi | 85% | 2470 fps | 99.1% |
| Accurate 5744 | <<locked>> | 84% | 53,548 psi | 86% | 2493 fps | 99.7% |
| Accurate LT-30ᴾ | <<locked>> | 100% | 46,949 psi | 75% | 2365 fps | 95.8% |
| Accurate No. 11 FS | <<locked>> | 88% | 56,159 psi | 90% | 2484 fps | 100% |
| ADI APS 450 | <<locked>> | 82% | 54,404 psi | 87% | 1821 fps | 100% |
| ADI AR 2205 | <<locked>> | 90% | 53,824 psi | 86% | 2375 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 46,238 psi | 74% | 2464 fps | 100% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 37,710 psi | 60% | 2352 fps | 96.9% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 49,385 psi | 79% | 2467 fps | 99.2% |
| Hodgdon H4198ᴾ | <<locked>> | 100% | 52,199 psi | 84% | 2454 fps | 96.2% |
| Hodgdon LilGun | <<locked>> | 82% | 54,070 psi | 87% | 2464 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 28,950 psi | 46% | 1440 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 41,974 psi | 67% | 2359 fps | 98.4% |
| IMR 4227 | <<locked>> | 98% | 55,811 psi | 89% | 2493 fps | 100% |
| Lovex D060 | <<locked>> | 90% | 53,838 psi | 86% | 2497 fps | 99.7% |
| Lovex D063 | <<locked>> | 86% | 53,853 psi | 86% | 2480 fps | 99.7% |
| Lovex S040 | <<locked>> | 84% | 55,898 psi | 90% | 2372 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 55,941 psi | 90% | 2484 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 42,598 psi | 68% | 2428 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 28,311 psi | 45% | 1473 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 98% | 54,331 psi | 87% | 2520 fps | 100% |
| Shooters World Blackout | <<locked>> | 86% | 53,853 psi | 86% | 2480 fps | 99.7% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 53,838 psi | 86% | 2497 fps | 99.7% |
| Shooters World SOCOM | <<locked>> | 90% | 55,056 psi | 88% | 2477 fps | 99.9% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 50,691 psi | 81% | 2287 fps | 100% |
| Vihtavuori N110 | <<locked>> | 94% | 55,985 psi | 90% | 2408 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 46,543 psi | 75% | 2428 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 37,043 psi | 59% | 2277 fps | 96.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 84% | 33,373 psi | 54% | 2159 fps | 95.1% |
| Accurate 5744 | <<locked>> | 80% | 47,500 psi | 76% | 2405 fps | 99.1% |
| Accurate LT-30 | <<locked>> | 98% | 44,193 psi | 71% | 2323 fps | 95.1% |
| Accurate No. 11 FS | <<locked>> | 80% | 43,294 psi | 69% | 2316 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 52,620 psi | 84% | 1798 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 39,813 psi | 64% | 2188 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 24,831 psi | 40% | 2051 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 96% | 33,170 psi | 53% | 2264 fps | 95.5% |
| Alliant Reloder-7 | <<locked>> | 86% | 31,807 psi | 51% | 2169 fps | 95.5% |
| Hodgdon H4198 | <<locked>> | 98% | 49,110 psi | 79% | 2408 fps | 95.6% |
| Hodgdon LilGun | <<locked>> | 80% | 50,415 psi | 81% | 2421 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,016 psi | 34% | 1286 fps | 100% |
| IMR 4198 | <<locked>> | 90% | 31,662 psi | 51% | 2159 fps | 95.6% |
| IMR 4227 | <<locked>> | 80% | 32,271 psi | 52% | 2126 fps | 97.6% |
| Lovex D060 | 46.5 gr | 80% | 40,132 psi | 64% | 2283 fps | 97.9% |
| Lovex D063 | <<locked>> | 80% | 44,106 psi | 71% | 2343 fps | 98.7% |
| Lovex S040 | <<locked>> | 80% | 49,705 psi | 80% | 2303 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 31,328 psi | 50% | 2113 fps | 99.6% |
| Norma 200 | <<locked>> | 90% | 30,995 psi | 50% | 2211 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 20,494 psi | 33% | 1312 fps | 100% |
| ReloadSwiss RS 36 | 48.4 gr | 80% | 30,937 psi | 50% | 2142 fps | 97.1% |
| Shooters World Blackout | <<locked>> | 80% | 44,106 psi | 71% | 2343 fps | 98.7% |
| Shooters World Buffalo Rifle | 46.5 gr | 80% | 40,132 psi | 64% | 2283 fps | 97.9% |
| Shooters World SOCOM | <<locked>> | 80% | 39,407 psi | 63% | 2254 fps | 98.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 29,718 psi | 48% | 1982 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 37,072 psi | 59% | 2165 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 25,237 psi | 40% | 2031 fps | 97.7% |
| Vihtavuori N130 | <<locked>> | 98% | 34,809 psi | 56% | 2234 fps | 95.5% |
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 28 powders for .458 Win.Mag. loaded with the .458 | 308gr | CutEdge ESP Raptor. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,520 fps; across all powders the maximum-charge window runs from 1,440 fps to 2,520 fps. Accurate LT-30 gives the best case fill at 100 %, and 28 of the 28 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 45–90 %, leaving at least 10 % headroom. The 308.0 gr projectile in 0.458" calls for a 1:20.5 twist; slower twists will usually not stabilise this weight. Accurate LT-30, ADI AR 2207, Alliant Reloder-10x 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. Shooters World Buffalo Rifle, Lovex D060, ReloadSwiss RS 36 rank at the top here: for .458 Win.Mag. with the .458 | 308gr | CutEdge ESP Raptor 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.