Load Specifications
Load data in caliber .458 x 2'' American with .458 | 325gr | 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 Shooters World Blackout.
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% | 49,690 psi | 83% | 2218 fps | 97.6% |
| Accurate 5744 | <<locked>> | 88% | 54,288 psi | 90% | 2290 fps | 99.1% |
| Accurate No. 11 FS | <<locked>> | 90% | 52,779 psi | 88% | 2241 fps | 100% |
| ADI APS 450 | <<locked>> | 82% | 53,461 psi | 89% | 1637 fps | 100% |
| ADI AR 2205 | <<locked>> | 92% | 51,445 psi | 86% | 2152 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 39,682 psi | 66% | 2178 fps | 99.3% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 42,699 psi | 71% | 2172 fps | 97.2% |
| Hodgdon LilGun | <<locked>> | 86% | 53,592 psi | 89% | 2270 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,876 psi | 46% | 1289 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 37,159 psi | 62% | 2073 fps | 95.9% |
| IMR 4227ᴾ | <<locked>> | 100% | 52,141 psi | 87% | 2244 fps | 99.7% |
| Lovex D060 | <<locked>> | 94% | 54,288 psi | 90% | 2290 fps | 99.1% |
| Lovex D063 | <<locked>> | 92% | 51,779 psi | 86% | 2231 fps | 99.2% |
| Lovex S040 | <<locked>> | 86% | 53,272 psi | 89% | 2152 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 49,153 psi | 82% | 2208 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 36,114 psi | 60% | 2129 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,398 psi | 46% | 1322 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 50,227 psi | 84% | 2267 fps | 99.5% |
| Shooters World Blackout | <<locked>> | 88% | 50,763 psi | 85% | 2231 fps | 98.7% |
| Shooters World Buffalo Rifle | <<locked>> | 94% | 54,288 psi | 90% | 2290 fps | 99.1% |
| Shooters World SOCOM | <<locked>> | 92% | 51,779 psi | 86% | 2231 fps | 99.2% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 45,223 psi | 75% | 2047 fps | 100% |
| Vihtavuori N110 | <<locked>> | 96% | 52,431 psi | 87% | 2182 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 40,190 psi | 67% | 2149 fps | 99.8% |
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>> | 92% | 38,145 psi | 64% | 2057 fps | 95.1% |
| Accurate 5744 | <<locked>> | 80% | 42,757 psi | 71% | 2129 fps | 97.4% |
| Accurate No. 11 FS | <<locked>> | 80% | 38,334 psi | 64% | 2051 fps | 99.1% |
| ADI APS 450 | <<locked>> | 80% | 51,242 psi | 85% | 1614 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 36,027 psi | 60% | 1946 fps | 99.7% |
| ADI AR 2207 | <<locked>> | 86% | 26,353 psi | 44% | 1916 fps | 95.8% |
| Alliant Reloder-7 | <<locked>> | 94% | 35,578 psi | 59% | 2060 fps | 95.4% |
| Hodgdon LilGun | <<locked>> | 80% | 43,801 psi | 73% | 2162 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,436 psi | 34% | 1152 fps | 100% |
| IMR 4198 | <<locked>> | 98% | 35,172 psi | 59% | 2037 fps | 95.2% |
| IMR 4227 | <<locked>> | 80% | 28,964 psi | 48% | 1877 fps | 95.1% |
| Lovex D060 | 37.2 gr | 80% | 36,419 psi | 61% | 2018 fps | 95.7% |
| Lovex D063 | <<locked>> | 80% | 35,085 psi | 58% | 1988 fps | 96.1% |
| Lovex S040 | <<locked>> | 80% | 44,657 psi | 74% | 2054 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 28,007 psi | 47% | 1873 fps | 98.3% |
| Norma 200 | <<locked>> | 98% | 34,098 psi | 57% | 2093 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 20,030 psi | 33% | 1181 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 28,993 psi | 48% | 1923 fps | 95% |
| Shooters World Blackout | 41.5 gr | 80% | 39,189 psi | 65% | 2067 fps | 96.7% |
| Shooters World Buffalo Rifle | 37.2 gr | 80% | 36,419 psi | 61% | 2018 fps | 95.7% |
| Shooters World SOCOM | <<locked>> | 80% | 35,085 psi | 58% | 1988 fps | 96.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 26,687 psi | 44% | 1768 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 33,185 psi | 55% | 1932 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 22,597 psi | 38% | 1791 fps | 95.1% |
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 | 325gr | Woodleigh HS. Accurate 5744 delivers the highest muzzle velocity at 2,290 fps; across all powders the maximum-charge window runs from 1,289 fps to 2,290 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, Shooters World Blackout rank at the top here: for .458 x 2'' American with the .458 | 325gr | Woodleigh HS 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.