Load Specifications
Load data in caliber .458 x 2'' American with .458 | 405gr | Alaska Bullet Works Kodiak FN SPFN bullet and 30 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 36, Shooters World Buffalo Rifle and Lovex D060.
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>> | 96% | 51,750 psi | 86% | 2008 fps | 99.6% |
| Accurate 2015ᴾ | <<locked>> | 100% | 33,837 psi | 56% | 1857 fps | 96% |
| Accurate 5744 | <<locked>> | 82% | 52,228 psi | 87% | 2018 fps | 100% |
| Accurate LT-30ᴾ | <<locked>> | 100% | 48,704 psi | 81% | 1959 fps | 97.5% |
| Accurate No. 11 FS | <<locked>> | 84% | 51,329 psi | 86% | 1972 fps | 100% |
| ADI AR 2205 | <<locked>> | 88% | 52,576 psi | 88% | 1916 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 48,530 psi | 81% | 2037 fps | 100% |
| ADI AR 2219ᴾ | <<locked>> | 100% | 44,918 psi | 75% | 2018 fps | 96.5% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 32,213 psi | 54% | 1867 fps | 97.7% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 39,972 psi | 67% | 1962 fps | 98.7% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 51,459 psi | 86% | 2041 fps | 99.9% |
| Baschieri & Pellagri 106ᴾ | <<locked>> | 100% | 46,122 psi | 77% | 1959 fps | 97.3% |
| Hodgdon H4198ᴾ | <<locked>> | 100% | 54,012 psi | 90% | 2028 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,805 psi | 50% | 1161 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 43,845 psi | 73% | 1955 fps | 99.6% |
| IMR 4227 | <<locked>> | 94% | 51,532 psi | 86% | 1988 fps | 100% |
| Lovex D060 | <<locked>> | 88% | 52,620 psi | 88% | 2021 fps | 100% |
| Lovex D063 | <<locked>> | 84% | 52,475 psi | 87% | 2008 fps | 100% |
| Lovex S053 | <<locked>> | 96% | 52,040 psi | 87% | 1978 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 45,382 psi | 76% | 2021 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 29,269 psi | 49% | 1188 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 96% | 53,214 psi | 89% | 2044 fps | 100% |
| Shooters World Blackout | <<locked>> | 84% | 52,475 psi | 87% | 2008 fps | 100% |
| Shooters World Buffalo Rifle | <<locked>> | 88% | 52,620 psi | 88% | 2021 fps | 100% |
| Shooters World SOCOM | <<locked>> | 88% | 53,359 psi | 89% | 2005 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 52,823 psi | 88% | 1867 fps | 100% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 41,930 psi | 70% | 1959 fps | 97% |
| Vihtavuori N110 | <<locked>> | 90% | 52,257 psi | 87% | 1913 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 48,762 psi | 81% | 2001 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 39,146 psi | 65% | 1896 fps | 98.1% |
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>> | 80% | 30,864 psi | 51% | 1726 fps | 96% |
| Accurate 2015 | <<locked>> | 98% | 31,966 psi | 53% | 1827 fps | 95.4% |
| Accurate 5744 | <<locked>> | 80% | 49,124 psi | 82% | 1982 fps | 99.8% |
| Accurate LT-30 | <<locked>> | 92% | 38,435 psi | 64% | 1827 fps | 95.3% |
| Accurate No. 11 FS | <<locked>> | 80% | 45,252 psi | 75% | 1906 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 41,582 psi | 69% | 1798 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 26,513 psi | 44% | 1709 fps | 98.5% |
| ADI AR 2219 | <<locked>> | 96% | 39,552 psi | 66% | 1942 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 94% | 27,166 psi | 45% | 1762 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 88% | 27,804 psi | 46% | 1755 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 28,210 psi | 47% | 1703 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 38,319 psi | 64% | 1854 fps | 95.5% |
| Hodgdon H4198 | <<locked>> | 90% | 40,292 psi | 67% | 1860 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,640 psi | 36% | 1030 fps | 100% |
| IMR 4198 | <<locked>> | 82% | 26,643 psi | 44% | 1663 fps | 95.2% |
| IMR 4227 | <<locked>> | 80% | 34,098 psi | 57% | 1762 fps | 99.1% |
| Lovex D060 | 36.7 gr | 80% | 41,669 psi | 69% | 1883 fps | 99.2% |
| Lovex D063 | <<locked>> | 80% | 45,905 psi | 77% | 1936 fps | 99.7% |
| Lovex S053 | <<locked>> | 80% | 33,098 psi | 55% | 1745 fps | 100% |
| Norma 200 | <<locked>> | 82% | 26,005 psi | 43% | 1709 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 21,364 psi | 36% | 1056 fps | 100% |
| ReloadSwiss RS 36 | 38.2 gr | 80% | 32,692 psi | 54% | 1778 fps | 98.8% |
| Shooters World Blackout | <<locked>> | 80% | 45,905 psi | 77% | 1936 fps | 99.7% |
| Shooters World Buffalo Rifle | 36.7 gr | 80% | 41,669 psi | 69% | 1883 fps | 99.2% |
| Shooters World SOCOM | <<locked>> | 80% | 41,162 psi | 69% | 1864 fps | 99.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 31,604 psi | 53% | 1627 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 94% | 35,201 psi | 59% | 1854 fps | 95.1% |
| Vihtavuori N110 | <<locked>> | 80% | 39,305 psi | 66% | 1775 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 26,890 psi | 45% | 1693 fps | 99.3% |
| Vihtavuori N130 | <<locked>> | 90% | 29,080 psi | 48% | 1729 fps | 95.2% |
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 30 powders for .458 x 2'' American loaded with the .458 | 405gr | Alaska Bullet Works Kodiak FN SPFN. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,044 fps; across all powders the maximum-charge window runs from 1,161 fps to 2,044 fps. Accurate 2015 gives the best case fill at 100 %, and 30 of the 30 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (414 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. Accurate 2015, Accurate LT-30, ADI AR 2207 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. ReloadSwiss RS 36, Shooters World Buffalo Rifle, Lovex D060 rank at the top here: for .458 x 2'' American with the .458 | 405gr | Alaska Bullet Works Kodiak FN SPFN 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.