Load Specifications
Load data in caliber .458 Win.Mag. with .458 | 400gr | Atomic 29 HP bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Shooters World AR Plus, Lovex D073.4 and SNPE Vectan SP 10.
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>> | 92% | 55,564 psi | 89% | 2215 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 43,743 psi | 70% | 2152 fps | 99.6% |
| Accurate 2460ᴾ | <<locked>> | 100% | 48,486 psi | 78% | 2234 fps | 98.3% |
| Accurate 2495ᴾ | <<locked>> | 100% | 31,415 psi | 50% | 2041 fps | 98% |
| Accurate 2520ᴾ | <<locked>> | 100% | 41,771 psi | 67% | 2182 fps | 96.7% |
| Accurate LT-30 | <<locked>> | 98% | 55,796 psi | 89% | 2215 fps | 99.7% |
| Accurate LT-32 | <<locked>> | 98% | 56,391 psi | 90% | 2221 fps | 98.8% |
| ADI APS 450 | <<locked>> | 82% | 56,405 psi | 90% | 1627 fps | 100% |
| ADI AR 2205 | <<locked>> | 84% | 54,592 psi | 88% | 2090 fps | 100% |
| ADI AR 2207 | <<locked>> | 96% | 54,215 psi | 87% | 2244 fps | 100% |
| ADI AR 2219 | <<locked>> | 98% | 52,634 psi | 84% | 2297 fps | 99.6% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 40,524 psi | 65% | 2175 fps | 100% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 50,618 psi | 81% | 2251 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 94% | 52,982 psi | 85% | 2218 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 98% | 53,621 psi | 86% | 2215 fps | 99.7% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 47,384 psi | 76% | 2169 fps | 96.4% |
| Hodgdon CFE BLK | <<locked>> | 82% | 53,200 psi | 85% | 2228 fps | 96.8% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 50,546 psi | 81% | 2274 fps | 99.4% |
| Hodgdon H335ᴾ | <<locked>> | 100% | 51,750 psi | 83% | 2293 fps | 98.9% |
| Hodgdon H4198 | <<locked>> | 94% | 54,694 psi | 88% | 2215 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,198 psi | 50% | 1289 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 38,421 psi | 62% | 2156 fps | 98.3% |
| IMR 4198ᴾ | <<locked>> | 100% | 53,171 psi | 85% | 2228 fps | 100% |
| IMR 4227 | <<locked>> | 90% | 54,868 psi | 88% | 2182 fps | 100% |
| Lovex D060 | <<locked>> | 84% | 55,100 psi | 88% | 2218 fps | 100% |
| Lovex D063 | <<locked>> | 84% | 56,159 psi | 90% | 2198 fps | 100% |
| Lovex D073.4 | <<locked>> | 96% | 53,911 psi | 86% | 2300 fps | 98.5% |
| Lovex D073.5ᴾ | <<locked>> | 100% | 48,834 psi | 78% | 2238 fps | 97.1% |
| Lovex S053 | <<locked>> | 92% | 55,970 psi | 90% | 2169 fps | 100% |
| Norma 200 | <<locked>> | 98% | 54,085 psi | 87% | 2274 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 38,914 psi | 62% | 2119 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 30,835 psi | 49% | 1319 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 90% | 54,389 psi | 87% | 2215 fps | 100% |
| ReloadSwiss RS 40ᴾ | <<locked>> | 100% | 50,067 psi | 80% | 2251 fps | 97.8% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 42,902 psi | 69% | 2149 fps | 97.4% |
| Shooters World AR Plus | <<locked>> | 96% | 53,911 psi | 86% | 2300 fps | 98.5% |
| Shooters World Buffalo Rifle | <<locked>> | 84% | 55,100 psi | 88% | 2218 fps | 100% |
| Shooters World SOCOM | <<locked>> | 84% | 56,159 psi | 90% | 2198 fps | 100% |
| Shooters World Tactical Rifleᴾ | <<locked>> | 100% | 55,825 psi | 90% | 2270 fps | 96.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 94% | 53,853 psi | 86% | 2014 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 98% | 52,924 psi | 85% | 2303 fps | 99% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 52,330 psi | 84% | 2260 fps | 99.9% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 43,294 psi | 69% | 2096 fps | 97.4% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 34,577 psi | 55% | 1972 fps | 96.2% |
| Somchem S321ᴾ | <<locked>> | 100% | 47,224 psi | 76% | 2238 fps | 96.1% |
| Somchem S335ᴾ | <<locked>> | 100% | 41,307 psi | 66% | 2096 fps | 97.9% |
| Vihtavuori N110 | <<locked>> | 86% | 55,390 psi | 89% | 2083 fps | 100% |
| Vihtavuori N120 | <<locked>> | 96% | 54,375 psi | 87% | 2201 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 48,950 psi | 78% | 2175 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 42,366 psi | 68% | 2103 fps | 99.3% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 34,505 psi | 55% | 2060 fps | 98.4% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 37,362 psi | 60% | 2067 fps | 96.5% |
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% | 37,449 psi | 60% | 1982 fps | 99.3% |
| Accurate 2015 | <<locked>> | 84% | 26,223 psi | 42% | 1847 fps | 95.5% |
| Accurate 2460 | <<locked>> | 90% | 34,200 psi | 55% | 2024 fps | 95% |
| Accurate 2495 | <<locked>> | 92% | 23,728 psi | 38% | 1873 fps | 95% |
| Accurate 2520 | <<locked>> | 96% | 36,303 psi | 58% | 2096 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 32,198 psi | 52% | 1877 fps | 95.8% |
| Accurate LT-32 | <<locked>> | 84% | 36,883 psi | 59% | 1955 fps | 95% |
| ADI APS 450 | <<locked>> | 80% | 54,360 psi | 87% | 1604 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 48,486 psi | 78% | 2024 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 33,011 psi | 53% | 1962 fps | 100% |
| ADI AR 2219 | <<locked>> | 82% | 30,980 psi | 50% | 1959 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 80% | 21,698 psi | 35% | 1772 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 27,195 psi | 44% | 1873 fps | 97.2% |
| Alliant Reloder-7 | <<locked>> | 80% | 34,374 psi | 55% | 1959 fps | 99.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 30,008 psi | 48% | 1864 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 96% | 42,047 psi | 67% | 2093 fps | 95.1% |
| Hodgdon CFE BLK | <<locked>> | 80% | 49,705 psi | 80% | 2182 fps | 96.2% |
| Hodgdon H322 | <<locked>> | 86% | 32,256 psi | 52% | 1985 fps | 95.6% |
| Hodgdon H335 | <<locked>> | 88% | 34,534 psi | 55% | 2037 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 80% | 35,592 psi | 57% | 1946 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,713 psi | 36% | 1148 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 29,965 psi | 48% | 1988 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 29,921 psi | 48% | 1880 fps | 98.6% |
| IMR 4227 | <<locked>> | 80% | 40,814 psi | 65% | 2008 fps | 100% |
| Lovex D060 | <<locked>> | 80% | 49,023 psi | 79% | 2142 fps | 100% |
| Lovex D063 | <<locked>> | 80% | 49,400 psi | 79% | 2123 fps | 100% |
| Lovex D073.4 | 59.2 gr | 86% | 37,565 psi | 60% | 2077 fps | 95.2% |
| Lovex D073.5 | <<locked>> | 94% | 39,320 psi | 63% | 2106 fps | 95% |
| Lovex S053 | <<locked>> | 80% | 39,697 psi | 64% | 1975 fps | 100% |
| Norma 200 | <<locked>> | 80% | 30,574 psi | 49% | 1936 fps | 98.8% |
| Norma 202 | <<locked>> | 96% | 34,403 psi | 55% | 2044 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,582 psi | 36% | 1178 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 39,827 psi | 64% | 2034 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 38,711 psi | 62% | 2087 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 94% | 35,810 psi | 57% | 2034 fps | 95.5% |
| Shooters World AR Plus | 59.2 gr | 86% | 37,565 psi | 60% | 2077 fps | 95.2% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 49,023 psi | 79% | 2142 fps | 100% |
| Shooters World SOCOM | <<locked>> | 80% | 49,400 psi | 79% | 2123 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 96% | 48,312 psi | 77% | 2182 fps | 95.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 37,159 psi | 60% | 1824 fps | 100% |
| SNPE Vectan SP 10 | 59.1 gr | 86% | 35,476 psi | 57% | 2051 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 28,181 psi | 45% | 1873 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 35,824 psi | 57% | 1982 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 32,590 psi | 52% | 1936 fps | 95.5% |
| Somchem S321 | <<locked>> | 98% | 44,048 psi | 71% | 2192 fps | 95.4% |
| Somchem S335 | <<locked>> | 92% | 32,213 psi | 52% | 1946 fps | 95.5% |
| Vihtavuori N110 | <<locked>> | 80% | 46,572 psi | 75% | 1991 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 33,301 psi | 53% | 1936 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 26,484 psi | 42% | 1811 fps | 96.5% |
| Vihtavuori N133 | <<locked>> | 86% | 27,833 psi | 45% | 1847 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 90% | 25,382 psi | 41% | 1864 fps | 95% |
| Vihtavuori N140 | <<locked>> | 96% | 32,924 psi | 53% | 1988 fps | 95% |
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 52 powders for .458 Win.Mag. loaded with the .458 | 400gr | Atomic 29 HP. SNPE Vectan SP 10 delivers the highest muzzle velocity at 2,303 fps; across all powders the maximum-charge window runs from 1,289 fps to 2,303 fps. Accurate 2015 gives the best case fill at 100 %, and 52 of the 52 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 400.0 gr projectile in 0.458" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2460, Accurate 2495 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 AR Plus, Lovex D073.4, SNPE Vectan SP 10 rank at the top here: for .458 Win.Mag. with the .458 | 400gr | Atomic 29 HP 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.