Load Specifications
Load data in caliber .458 x 2'' American with .458 | 400gr | Woodleigh HS 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 Accurate 5744.
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 1680ᴾ | <<locked>> | 100% | 49,632 psi | 83% | 1900 fps | 98.3% |
| Accurate 5744 | <<locked>> | 90% | 51,764 psi | 86% | 1929 fps | 99.3% |
| Accurate No. 11 FS | <<locked>> | 90% | 52,982 psi | 88% | 1916 fps | 100% |
| ADI APS 450 | <<locked>> | 82% | 53,548 psi | 89% | 1385 fps | 100% |
| ADI AR 2205 | <<locked>> | 92% | 51,387 psi | 86% | 1834 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 39,769 psi | 66% | 1867 fps | 99.7% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 42,960 psi | 72% | 1867 fps | 98.1% |
| Hodgdon LilGun | <<locked>> | 86% | 53,824 psi | 90% | 1936 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 28,065 psi | 47% | 1089 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 37,173 psi | 62% | 1778 fps | 97% |
| IMR 4227ᴾ | <<locked>> | 100% | 52,243 psi | 87% | 1916 fps | 99.9% |
| Lovex D060 | <<locked>> | 92% | 51,343 psi | 86% | 1923 fps | 99.3% |
| Lovex D063 | <<locked>> | 92% | 52,170 psi | 87% | 1909 fps | 99.6% |
| Lovex S040 | <<locked>> | 86% | 53,737 psi | 90% | 1831 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 49,153 psi | 82% | 1883 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 36,303 psi | 61% | 1831 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,514 psi | 46% | 1115 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 50,357 psi | 84% | 1939 fps | 99.8% |
| Shooters World Blackout | <<locked>> | 88% | 50,937 psi | 85% | 1909 fps | 99.3% |
| Shooters World Buffalo Rifle | <<locked>> | 92% | 51,343 psi | 86% | 1923 fps | 99.3% |
| Shooters World SOCOM | <<locked>> | 92% | 52,170 psi | 87% | 1909 fps | 99.6% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 45,411 psi | 76% | 1742 fps | 100% |
| Vihtavuori N110 | <<locked>> | 96% | 52,750 psi | 88% | 1857 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 40,176 psi | 67% | 1841 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% | 35,853 psi | 60% | 1732 fps | 95.5% |
| Accurate 5744 | 31.6 gr | 80% | 38,493 psi | 64% | 1759 fps | 97.3% |
| Accurate No. 11 FS | <<locked>> | 80% | 38,406 psi | 64% | 1752 fps | 99.6% |
| ADI APS 450 | <<locked>> | 80% | 51,329 psi | 86% | 1365 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 36,143 psi | 60% | 1660 fps | 99.9% |
| ADI AR 2207 | <<locked>> | 82% | 23,612 psi | 39% | 1585 fps | 95.7% |
| Alliant Reloder-7 | <<locked>> | 90% | 31,836 psi | 53% | 1706 fps | 95.3% |
| Hodgdon LilGun | <<locked>> | 80% | 43,918 psi | 73% | 1844 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,450 psi | 34% | 971 fps | 100% |
| IMR 4198 | <<locked>> | 94% | 31,676 psi | 53% | 1686 fps | 95.2% |
| IMR 4227 | <<locked>> | 80% | 29,022 psi | 48% | 1608 fps | 96.3% |
| Lovex D060 | 30.9 gr | 80% | 36,535 psi | 61% | 1729 fps | 96.8% |
| Lovex D063 | <<locked>> | 80% | 35,288 psi | 59% | 1706 fps | 97.2% |
| Lovex S040 | <<locked>> | 80% | 45,194 psi | 75% | 1749 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 28,079 psi | 47% | 1601 fps | 99% |
| Norma 200 | <<locked>> | 94% | 30,182 psi | 50% | 1736 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 20,189 psi | 34% | 997 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 27,441 psi | 46% | 1617 fps | 95.6% |
| Shooters World Blackout | <<locked>> | 80% | 39,421 psi | 66% | 1772 fps | 97.6% |
| Shooters World Buffalo Rifle | 30.9 gr | 80% | 36,535 psi | 61% | 1729 fps | 96.8% |
| Shooters World SOCOM | <<locked>> | 80% | 35,288 psi | 59% | 1706 fps | 97.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 26,919 psi | 45% | 1509 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 33,286 psi | 55% | 1644 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 22,713 psi | 38% | 1539 fps | 96.5% |
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 24 powders for .458 x 2'' American loaded with the .458 | 400gr | Woodleigh HS. ReloadSwiss RS 36 delivers the highest muzzle velocity at 1,939 fps; across all powders the maximum-charge window runs from 1,089 fps to 1,939 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 (414 MPa), the top charges use 46–90 %, 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, Accurate 5744 rank at the top here: for .458 x 2'' American with the .458 | 400gr | Woodleigh HS they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss, ReloadSwiss RS 14 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.