Load Specifications
Load data in caliber .458 Win.Mag. with .458 | 255gr | Lehigh Defense Match Solid bullet and 24 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680ᴾ | <<locked>> | 100% | 55,085 psi | 88% | 2795 fps | 98.5% |
| Accurate 5744 | <<locked>> | 86% | 55,259 psi | 89% | 2835 fps | 99.2% |
| Accurate No. 11 FS | <<locked>> | 88% | 54,070 psi | 87% | 2772 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 55,970 psi | 90% | 2096 fps | 100% |
| ADI AR 2205 | <<locked>> | 92% | 55,535 psi | 89% | 2707 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 44,280 psi | 71% | 2743 fps | 99.7% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 47,195 psi | 76% | 2736 fps | 98.1% |
| Hodgdon LilGun | <<locked>> | 84% | 55,376 psi | 89% | 2805 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 28,369 psi | 45% | 1640 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 40,350 psi | 65% | 2615 fps | 96.9% |
| IMR 4227 | <<locked>> | 98% | 53,708 psi | 86% | 2782 fps | 99.8% |
| Lovex D060 | <<locked>> | 92% | 55,259 psi | 89% | 2835 fps | 99.2% |
| Lovex D063 | <<locked>> | 88% | 55,651 psi | 89% | 2818 fps | 99.3% |
| Lovex S040 | <<locked>> | 84% | 53,838 psi | 86% | 2667 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 53,780 psi | 86% | 2779 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 40,654 psi | 65% | 2687 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,760 psi | 45% | 1677 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 55,492 psi | 89% | 2854 fps | 99.9% |
| Shooters World Blackout | <<locked>> | 88% | 55,651 psi | 89% | 2818 fps | 99.3% |
| Shooters World Buffalo Rifle | <<locked>> | 92% | 55,259 psi | 89% | 2835 fps | 99.2% |
| Shooters World SOCOM | <<locked>> | 90% | 53,214 psi | 85% | 2762 fps | 99.4% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 49,052 psi | 79% | 2572 fps | 100% |
| Vihtavuori N110 | <<locked>> | 94% | 53,824 psi | 86% | 2703 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 44,643 psi | 72% | 2707 fps | 100% |
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>> | 90% | 39,262 psi | 63% | 2543 fps | 95.5% |
| Accurate 5744 | <<locked>> | 80% | 45,818 psi | 73% | 2680 fps | 98% |
| Accurate No. 11 FS | <<locked>> | 80% | 41,452 psi | 66% | 2579 fps | 99.5% |
| ADI APS 450 | <<locked>> | 80% | 52,025 psi | 83% | 2044 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 38,537 psi | 62% | 2448 fps | 99.9% |
| ADI AR 2207 | <<locked>> | 84% | 26,818 psi | 43% | 2362 fps | 95.7% |
| Alliant Reloder-7 | <<locked>> | 90% | 34,635 psi | 56% | 2500 fps | 95% |
| Hodgdon LilGun | <<locked>> | 80% | 48,196 psi | 77% | 2713 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,581 psi | 33% | 1463 fps | 100% |
| IMR 4198 | <<locked>> | 96% | 36,085 psi | 58% | 2526 fps | 95.6% |
| IMR 4227 | <<locked>> | 80% | 31,096 psi | 50% | 2365 fps | 95.8% |
| Lovex D060 | 52.4 gr | 80% | 38,885 psi | 62% | 2543 fps | 96.4% |
| Lovex D063 | <<locked>> | 80% | 42,569 psi | 68% | 2608 fps | 97.5% |
| Lovex S040 | <<locked>> | 80% | 47,776 psi | 77% | 2585 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 29,965 psi | 48% | 2349 fps | 98.6% |
| Norma 200 | <<locked>> | 94% | 33,431 psi | 54% | 2539 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,986 psi | 32% | 1493 fps | 100% |
| ReloadSwiss RS 36 | 54.5 gr | 80% | 29,588 psi | 47% | 2375 fps | 95.1% |
| Shooters World Blackout | <<locked>> | 80% | 42,569 psi | 68% | 2608 fps | 97.5% |
| Shooters World Buffalo Rifle | 52.4 gr | 80% | 38,885 psi | 62% | 2543 fps | 96.4% |
| Shooters World SOCOM | <<locked>> | 80% | 38,072 psi | 61% | 2510 fps | 97% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 28,572 psi | 46% | 2224 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 35,592 psi | 57% | 2428 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 24,163 psi | 39% | 2247 fps | 95.7% |
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 24 powders for .458 Win.Mag. loaded with the .458 | 255gr | Lehigh Defense Match Solid. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,854 fps; across all powders the maximum-charge window runs from 1,640 fps to 2,854 fps. Accurate 1680 gives the best case fill at 100 %, and 24 of the 24 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. Accurate 1680, ADI AR 2207, Alliant Reloder-7 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 | 255gr | Lehigh Defense Match Solid 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.