Load Specifications
Load data in caliber .458 Win.Mag. with .458 | 400gr | Swift A-Frame bullet and 70 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 1200-R, Hodgdon H335 and Hodgdon H322.
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>> | 88% | 56,376 psi | 90% | 2293 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 53,026 psi | 85% | 2329 fps | 100% |
| Accurate 2200 | <<locked>> | 92% | 55,869 psi | 90% | 2402 fps | 96.5% |
| Accurate 2230 | <<locked>> | 92% | 56,101 psi | 90% | 2411 fps | 96.9% |
| Accurate 2460 | <<locked>> | 98% | 55,448 psi | 89% | 2388 fps | 99.7% |
| Accurate 2495ᴾ | <<locked>> | 100% | 40,872 psi | 66% | 2241 fps | 99.9% |
| Accurate 2520ᴾ | <<locked>> | 100% | 51,996 psi | 83% | 2385 fps | 99.3% |
| Accurate 4064ᴾ | <<locked>> | 100% | 38,043 psi | 61% | 2215 fps | 98.2% |
| Accurate LT-30 | <<locked>> | 92% | 53,476 psi | 86% | 2264 fps | 100% |
| Accurate LT-32 | <<locked>> | 92% | 53,998 psi | 87% | 2274 fps | 99.4% |
| ADI AR 2206Hᴾ | <<locked>> | 100% | 48,892 psi | 78% | 2333 fps | 96.2% |
| ADI AR 2207 | <<locked>> | 90% | 53,388 psi | 86% | 2290 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 55,100 psi | 88% | 2402 fps | 100% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 52,069 psi | 83% | 2349 fps | 98% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 49,081 psi | 79% | 2352 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 98% | 56,246 psi | 90% | 2480 fps | 98.2% |
| Alliant Reloder-10x | <<locked>> | 96% | 53,722 psi | 86% | 2346 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 90% | 55,129 psi | 88% | 2306 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 55,143 psi | 88% | 2303 fps | 100% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 55,579 psi | 89% | 2352 fps | 98.8% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 49,226 psi | 79% | 2372 fps | 98.1% |
| Hodgdon CFE223ᴾ | <<locked>> | 100% | 55,738 psi | 89% | 2487 fps | 96.7% |
| Hodgdon H322 | <<locked>> | 96% | 53,069 psi | 85% | 2375 fps | 100% |
| Hodgdon H335 | <<locked>> | 96% | 54,288 psi | 87% | 2398 fps | 99.7% |
| Hodgdon H4198 | <<locked>> | 90% | 55,738 psi | 89% | 2303 fps | 99.9% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 49,052 psi | 79% | 2346 fps | 96.9% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 44,411 psi | 71% | 2313 fps | 96% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,503 psi | 52% | 1358 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 48,167 psi | 77% | 2310 fps | 96.4% |
| IMR 3031ᴾ | <<locked>> | 100% | 46,514 psi | 75% | 2349 fps | 99.9% |
| IMR 4198 | <<locked>> | 96% | 55,317 psi | 89% | 2320 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 55,941 psi | 90% | 2257 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 52,069 psi | 83% | 2349 fps | 98% |
| Lovex D073.4 | <<locked>> | 90% | 52,881 psi | 85% | 2362 fps | 99.2% |
| Lovex D073.5 | <<locked>> | 98% | 55,753 psi | 89% | 2395 fps | 99.1% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 45,818 psi | 73% | 2316 fps | 98.5% |
| Lovex S053 | <<locked>> | 86% | 54,433 psi | 87% | 2211 fps | 100% |
| Lovex S060ᴾ | <<locked>> | 100% | 51,053 psi | 82% | 2287 fps | 96.4% |
| Lovex S062ᴾ | <<locked>> | 100% | 42,105 psi | 68% | 2228 fps | 96.1% |
| Norma 200 | <<locked>> | 92% | 54,099 psi | 87% | 2333 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 47,601 psi | 76% | 2293 fps | 97.3% |
| Norma 202ᴾ | <<locked>> | 100% | 47,384 psi | 76% | 2313 fps | 99.2% |
| Ramshot Wild Boarᴾ | <<locked>> | 100% | 51,155 psi | 82% | 2372 fps | 96.4% |
| Ramshot X-Terminator | <<locked>> | 98% | 54,824 psi | 88% | 2359 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,460 psi | 52% | 1391 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 55,869 psi | 90% | 2293 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 98% | 56,057 psi | 90% | 2398 fps | 99.4% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 51,866 psi | 83% | 2336 fps | 99.5% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 45,005 psi | 72% | 2247 fps | 96.7% |
| Shooters World AR Plus | <<locked>> | 90% | 52,881 psi | 85% | 2362 fps | 99.2% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 45,818 psi | 73% | 2316 fps | 98.5% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 42,105 psi | 68% | 2228 fps | 96.1% |
| Shooters World Tactical Rifle | <<locked>> | 94% | 53,679 psi | 86% | 2329 fps | 97.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 55,114 psi | 88% | 2083 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 55,535 psi | 89% | 2408 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 55,085 psi | 88% | 2359 fps | 100% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 51,401 psi | 82% | 2274 fps | 99.4% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 41,104 psi | 66% | 2149 fps | 98.9% |
| Somchem S321 | <<locked>> | 98% | 53,287 psi | 85% | 2388 fps | 98.4% |
| Somchem S335ᴾ | <<locked>> | 100% | 49,385 psi | 79% | 2274 fps | 99.7% |
| Somchem S341ᴾ | <<locked>> | 100% | 49,719 psi | 80% | 2326 fps | 95.9% |
| Vihtavuori N120 | <<locked>> | 90% | 53,388 psi | 86% | 2247 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 54,476 psi | 87% | 2303 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 50,401 psi | 81% | 2270 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 42,366 psi | 68% | 2244 fps | 99.9% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 44,860 psi | 72% | 2254 fps | 99.1% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 53,040 psi | 85% | 2356 fps | 98.1% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 43,366 psi | 70% | 2251 fps | 98.5% |
| Winchester 748ᴾ | <<locked>> | 100% | 50,502 psi | 81% | 2385 fps | 98.5% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 46,456 psi | 74% | 2313 fps | 96.1% |
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% | 43,569 psi | 70% | 2136 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 28,572 psi | 46% | 1942 fps | 97.5% |
| Accurate 2200 | <<locked>> | 88% | 49,168 psi | 79% | 2310 fps | 95.1% |
| Accurate 2230 | <<locked>> | 88% | 48,762 psi | 78% | 2316 fps | 95.5% |
| Accurate 2460 | <<locked>> | 82% | 32,489 psi | 52% | 2044 fps | 95.7% |
| Accurate 2495 | <<locked>> | 82% | 22,669 psi | 36% | 1873 fps | 95.6% |
| Accurate 2520 | <<locked>> | 86% | 32,126 psi | 52% | 2077 fps | 95.1% |
| Accurate 4064 | <<locked>> | 92% | 29,573 psi | 47% | 2051 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 37,362 psi | 60% | 2034 fps | 98.4% |
| Accurate LT-32 | <<locked>> | 80% | 37,753 psi | 61% | 2037 fps | 96.7% |
| ADI AR 2206H | <<locked>> | 98% | 46,093 psi | 74% | 2293 fps | 95.5% |
| ADI AR 2207 | <<locked>> | 80% | 39,363 psi | 63% | 2110 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 34,650 psi | 56% | 2096 fps | 97.7% |
| ADI Benchmark 8208 | <<locked>> | 92% | 40,814 psi | 65% | 2185 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 80% | 26,310 psi | 42% | 1955 fps | 98.9% |
| Alliant Power Pro 1200-R | 65.6 gr | 88% | 40,611 psi | 65% | 2254 fps | 95% |
| Alliant Reloder-10x | <<locked>> | 80% | 33,127 psi | 53% | 2044 fps | 99.4% |
| Alliant Reloder-7 | <<locked>> | 80% | 40,756 psi | 65% | 2119 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 35,534 psi | 57% | 2028 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 36,637 psi | 59% | 2070 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 92% | 37,739 psi | 61% | 2192 fps | 95.6% |
| Hodgdon CFE223 | <<locked>> | 96% | 48,559 psi | 78% | 2388 fps | 95.2% |
| Hodgdon H322 | 59.6 gr | 80% | 31,850 psi | 51% | 2037 fps | 96.8% |
| Hodgdon H335 | 63.7 gr | 80% | 31,894 psi | 51% | 2044 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 41,191 psi | 66% | 2106 fps | 98.7% |
| Hodgdon H4895 | <<locked>> | 96% | 43,453 psi | 70% | 2260 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 41,597 psi | 67% | 2264 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,018 psi | 39% | 1211 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 42,598 psi | 68% | 2224 fps | 95.1% |
| IMR 3031 | <<locked>> | 82% | 26,832 psi | 43% | 1972 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 34,969 psi | 56% | 2034 fps | 99.9% |
| IMR 4227 | <<locked>> | 80% | 46,804 psi | 75% | 2149 fps | 100% |
| IMR 8208 XBR | <<locked>> | 92% | 40,814 psi | 65% | 2185 fps | 95.6% |
| Lovex D073.4 | <<locked>> | 80% | 37,318 psi | 60% | 2133 fps | 96.5% |
| Lovex D073.5 | <<locked>> | 86% | 36,941 psi | 59% | 2126 fps | 95.7% |
| Lovex D073.6 | <<locked>> | 90% | 32,663 psi | 52% | 2096 fps | 95.3% |
| Lovex S053 | <<locked>> | 80% | 45,919 psi | 74% | 2110 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 45,411 psi | 73% | 2208 fps | 95.2% |
| Lovex S062 | <<locked>> | 98% | 39,726 psi | 64% | 2188 fps | 95.5% |
| Norma 200 | <<locked>> | 80% | 37,333 psi | 60% | 2103 fps | 100% |
| Norma 201 | <<locked>> | 94% | 39,624 psi | 64% | 2169 fps | 95.4% |
| Norma 202 | <<locked>> | 86% | 30,705 psi | 49% | 2024 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 96% | 45,020 psi | 72% | 2283 fps | 95% |
| Ramshot X-Terminator | <<locked>> | 94% | 48,182 psi | 77% | 2274 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,960 psi | 38% | 1240 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 46,499 psi | 75% | 2182 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 33,678 psi | 54% | 2057 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 82% | 30,748 psi | 49% | 1985 fps | 95% |
| Rottweil R 902 | <<locked>> | 96% | 39,871 psi | 64% | 2165 fps | 95.4% |
| Shooters World AR Plus | <<locked>> | 80% | 37,318 psi | 60% | 2133 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 90% | 32,663 psi | 52% | 2096 fps | 95.3% |
| Shooters World Precision | <<locked>> | 98% | 39,726 psi | 64% | 2188 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 41,002 psi | 66% | 2152 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 42,395 psi | 68% | 1939 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 34,969 psi | 56% | 2100 fps | 96.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 33,663 psi | 54% | 2044 fps | 98.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 31,575 psi | 51% | 1962 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 28,718 psi | 46% | 1919 fps | 95.5% |
| Somchem S321 | <<locked>> | 88% | 38,218 psi | 61% | 2169 fps | 95.3% |
| Somchem S335 | <<locked>> | 82% | 28,848 psi | 46% | 1926 fps | 95.5% |
| Somchem S341 | <<locked>> | 98% | 46,470 psi | 75% | 2280 fps | 95.2% |
| Vihtavuori N120 | <<locked>> | 80% | 39,537 psi | 63% | 2077 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 31,821 psi | 51% | 1972 fps | 99% |
| Vihtavuori N133 | <<locked>> | 80% | 27,673 psi | 44% | 1896 fps | 96.9% |
| Vihtavuori N135 | <<locked>> | 80% | 22,989 psi | 37% | 1850 fps | 95.1% |
| Vihtavuori N140 | <<locked>> | 86% | 29,211 psi | 47% | 1972 fps | 95% |
| Vihtavuori N530 | <<locked>> | 92% | 40,756 psi | 65% | 2182 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 90% | 31,589 psi | 51% | 2041 fps | 95.4% |
| Winchester 748 | <<locked>> | 90% | 36,593 psi | 59% | 2162 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 98% | 43,497 psi | 70% | 2267 fps | 95.4% |
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 90 powders for .458 Win.Mag. loaded with the .458 | 400gr | Swift A-Frame. Hodgdon CFE223 delivers the highest muzzle velocity at 2,487 fps; across all powders the maximum-charge window runs from 1,358 fps to 2,487 fps. Accurate 2015 gives the best case fill at 100 %, and 90 of the 90 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. Accurate 2015, Accurate 2495, Accurate 2520 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. Alliant Power Pro 1200-R, Hodgdon H335, Hodgdon H322 rank at the top here: for .458 Win.Mag. with the .458 | 400gr | Swift A-Frame they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2208, Alliant Power Pro 2000-MR, Alliant Reloder- TS 15.5 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.