Load Specifications
Load data in caliber .458 Win.Mag. with .458 | 500gr | Speer AGS SP bullet and 88 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon CFE223, Alliant Power Pro 1200-R and Accurate 2200.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 86% | 55,143 psi | 88% | 1955 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 55,767 psi | 89% | 2028 fps | 100% |
| Accurate 2200 | <<locked>> | 90% | 55,042 psi | 88% | 2067 fps | 97.8% |
| Accurate 2230 | <<locked>> | 90% | 55,042 psi | 88% | 2073 fps | 98.1% |
| Accurate 2460 | <<locked>> | 96% | 54,621 psi | 88% | 2051 fps | 100% |
| Accurate 2495ᴾ | <<locked>> | 100% | 43,642 psi | 70% | 1965 fps | 100% |
| Accurate 2520ᴾ | <<locked>> | 100% | 54,984 psi | 88% | 2090 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 40,640 psi | 65% | 1949 fps | 99.6% |
| Accurate LT-30 | <<locked>> | 92% | 55,869 psi | 90% | 1969 fps | 100% |
| Accurate LT-32 | <<locked>> | 92% | 56,391 psi | 90% | 1982 fps | 100% |
| ADI AR 2206Hᴾ | <<locked>> | 100% | 51,416 psi | 82% | 2051 fps | 98.1% |
| ADI AR 2207 | <<locked>> | 90% | 55,970 psi | 90% | 1985 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 43,758 psi | 70% | 1932 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 92% | 54,172 psi | 87% | 2057 fps | 100% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 54,694 psi | 88% | 2060 fps | 99.3% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 51,909 psi | 83% | 2051 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 96% | 55,419 psi | 89% | 2136 fps | 99.2% |
| Alliant Power Pro 2000-MRᴾ | <<locked>> | 100% | 48,080 psi | 77% | 2070 fps | 96% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 41,060 psi | 66% | 1942 fps | 97.2% |
| Alliant Reloder-10x | <<locked>> | 96% | 56,333 psi | 90% | 2037 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 45,223 psi | 73% | 1995 fps | 96.5% |
| Alliant Reloder-7 | <<locked>> | 88% | 54,128 psi | 87% | 1965 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 92% | 54,157 psi | 87% | 1975 fps | 100% |
| Baschieri & Pellagri 107ᴾ | <<locked>> | 100% | 51,126 psi | 82% | 2057 fps | 96.8% |
| Bofors RP3ᴾ | <<locked>> | 100% | 40,248 psi | 65% | 1949 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 98% | 54,810 psi | 88% | 2021 fps | 99.6% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 52,069 psi | 83% | 2083 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 98% | 54,636 psi | 88% | 2146 fps | 98.1% |
| Hodgdon H322 | <<locked>> | 96% | 55,796 psi | 89% | 2073 fps | 100% |
| Hodgdon H335 | <<locked>> | 94% | 53,359 psi | 86% | 2060 fps | 100% |
| Hodgdon H4198 | <<locked>> | 88% | 54,694 psi | 88% | 1969 fps | 100% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 51,634 psi | 83% | 2060 fps | 98.6% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 46,630 psi | 75% | 2037 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,866 psi | 53% | 1158 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 50,488 psi | 81% | 2028 fps | 98.3% |
| IMR 3031ᴾ | <<locked>> | 100% | 49,124 psi | 79% | 2054 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 45,803 psi | 73% | 1955 fps | 96.5% |
| IMR 4198 | <<locked>> | 94% | 54,607 psi | 88% | 1978 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 54,998 psi | 88% | 1923 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 46,180 psi | 74% | 2021 fps | 97.4% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 54,694 psi | 88% | 2060 fps | 99.3% |
| Lovex D073.4 | <<locked>> | 90% | 55,637 psi | 89% | 2064 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 96% | 54,723 psi | 88% | 2057 fps | 99.7% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 48,443 psi | 78% | 2034 fps | 99.7% |
| Lovex S053 | <<locked>> | 84% | 53,650 psi | 86% | 1880 fps | 100% |
| Lovex S060ᴾ | <<locked>> | 100% | 53,258 psi | 85% | 2001 fps | 98.2% |
| Lovex S062ᴾ | <<locked>> | 100% | 44,280 psi | 71% | 1955 fps | 98.1% |
| Norma 200 | <<locked>> | 90% | 53,403 psi | 86% | 1991 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 50,125 psi | 80% | 2011 fps | 98.9% |
| Norma 202ᴾ | <<locked>> | 100% | 49,864 psi | 80% | 2024 fps | 99.9% |
| Norma 203Bᴾ | <<locked>> | 100% | 44,222 psi | 71% | 1985 fps | 96.9% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 45,034 psi | 72% | 1998 fps | 96.4% |
| Ramshot TACᴾ | <<locked>> | 100% | 56,057 psi | 90% | 2067 fps | 96.1% |
| Ramshot Wild Boarᴾ | <<locked>> | 100% | 53,853 psi | 86% | 2083 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 96% | 53,722 psi | 86% | 2031 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,851 psi | 53% | 1184 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 84% | 54,969 psi | 88% | 1952 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 96% | 55,056 psi | 88% | 2057 fps | 99.9% |
| ReloadSwiss RS 52ᴾ | <<locked>> | 100% | 47,442 psi | 76% | 2070 fps | 96.8% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 39,726 psi | 64% | 1972 fps | 98% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 54,476 psi | 87% | 2041 fps | 100% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 47,268 psi | 76% | 1972 fps | 98.5% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 37,391 psi | 60% | 1900 fps | 96% |
| Shooters World AR Plus | <<locked>> | 90% | 55,637 psi | 89% | 2064 fps | 99.9% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 48,443 psi | 78% | 2034 fps | 99.7% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 44,280 psi | 71% | 1955 fps | 98.1% |
| Shooters World Tactical Rifle | <<locked>> | 94% | 56,362 psi | 90% | 2041 fps | 99.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 54,346 psi | 87% | 1768 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 92% | 54,520 psi | 87% | 2064 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 94% | 54,491 psi | 87% | 2018 fps | 100% |
| SNPE Vectan SP 7ᴾ | <<locked>> | 100% | 53,098 psi | 85% | 2044 fps | 96.2% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 49,763 psi | 80% | 2031 fps | 97.7% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 53,751 psi | 86% | 1982 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 43,120 psi | 69% | 1880 fps | 99.8% |
| Somchem S321 | <<locked>> | 98% | 56,043 psi | 90% | 2096 fps | 99.6% |
| Somchem S335ᴾ | <<locked>> | 100% | 51,851 psi | 83% | 1985 fps | 100% |
| Somchem S341ᴾ | <<locked>> | 100% | 52,272 psi | 84% | 2044 fps | 97.9% |
| Somchem S355ᴾ | <<locked>> | 100% | 39,146 psi | 63% | 1906 fps | 96.1% |
| Vihtavuori N120 | <<locked>> | 90% | 55,927 psi | 90% | 1946 fps | 100% |
| Vihtavuori N130 | <<locked>> | 96% | 53,766 psi | 86% | 1972 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 52,837 psi | 85% | 1975 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 44,875 psi | 72% | 1962 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 47,340 psi | 76% | 1975 fps | 99.9% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 37,811 psi | 61% | 1867 fps | 97.1% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 55,564 psi | 89% | 2060 fps | 99.4% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 45,571 psi | 73% | 1972 fps | 99.6% |
| Winchester 748ᴾ | <<locked>> | 100% | 53,171 psi | 85% | 2093 fps | 99.7% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 48,863 psi | 78% | 2034 fps | 98.2% |
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% | 45,527 psi | 73% | 1857 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 30,240 psi | 48% | 1706 fps | 99.2% |
| Accurate 2200 | 53.4 gr | 82% | 42,351 psi | 68% | 1906 fps | 95.3% |
| Accurate 2230 | <<locked>> | 82% | 41,698 psi | 67% | 1909 fps | 95.6% |
| Accurate 2460 | <<locked>> | 80% | 32,140 psi | 52% | 1759 fps | 97.3% |
| Accurate 2495 | <<locked>> | 80% | 22,756 psi | 36% | 1624 fps | 97.5% |
| Accurate 2520 | <<locked>> | 80% | 27,775 psi | 45% | 1716 fps | 95.4% |
| Accurate 4064 | <<locked>> | 84% | 24,555 psi | 39% | 1670 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 39,146 psi | 63% | 1775 fps | 99.6% |
| Accurate LT-32 | <<locked>> | 80% | 39,479 psi | 63% | 1781 fps | 98.5% |
| ADI AR 2206H | <<locked>> | 90% | 37,927 psi | 61% | 1867 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 41,423 psi | 66% | 1831 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 41,292 psi | 66% | 1900 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 36,376 psi | 58% | 1837 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 33,460 psi | 54% | 1775 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 27,760 psi | 45% | 1722 fps | 100% |
| Alliant Power Pro 1200-R | 52.6 gr | 82% | 35,288 psi | 57% | 1864 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 44,976 psi | 72% | 2028 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 34,389 psi | 55% | 1841 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 34,983 psi | 56% | 1785 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 39,856 psi | 64% | 1919 fps | 95.1% |
| Alliant Reloder-7 | <<locked>> | 80% | 42,714 psi | 68% | 1841 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 37,130 psi | 60% | 1775 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 96% | 44,904 psi | 72% | 1978 fps | 95.4% |
| Bofors RP3 | <<locked>> | 94% | 32,996 psi | 53% | 1834 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 32,169 psi | 52% | 1713 fps | 95.4% |
| Hodgdon BL-C2 | <<locked>> | 84% | 30,545 psi | 49% | 1778 fps | 95% |
| Hodgdon CFE223 | 63 gr | 90% | 41,901 psi | 67% | 1982 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 80% | 33,446 psi | 54% | 1788 fps | 98.7% |
| Hodgdon H335 | <<locked>> | 80% | 33,634 psi | 54% | 1801 fps | 97.9% |
| Hodgdon H4198 | <<locked>> | 80% | 43,120 psi | 69% | 1837 fps | 99.7% |
| Hodgdon H4895 | <<locked>> | 88% | 35,723 psi | 57% | 1841 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 36,274 psi | 58% | 1883 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,337 psi | 39% | 1030 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 37,275 psi | 60% | 1847 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 26,498 psi | 42% | 1703 fps | 97.5% |
| IMR 4064 | <<locked>> | 96% | 40,524 psi | 65% | 1883 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 36,651 psi | 59% | 1772 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 48,762 psi | 78% | 1860 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 38,247 psi | 61% | 1906 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 84% | 33,460 psi | 54% | 1775 fps | 95.2% |
| Lovex D073.4 | <<locked>> | 80% | 39,363 psi | 63% | 1870 fps | 98.4% |
| Lovex D073.5 | <<locked>> | 80% | 31,937 psi | 51% | 1759 fps | 95.9% |
| Lovex D073.6 | <<locked>> | 84% | 28,558 psi | 46% | 1742 fps | 95.7% |
| Lovex S053 | <<locked>> | 80% | 47,950 psi | 77% | 1824 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 39,827 psi | 64% | 1831 fps | 95.5% |
| Lovex S062 | <<locked>> | 90% | 32,837 psi | 53% | 1785 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 39,320 psi | 63% | 1831 fps | 100% |
| Norma 201 | <<locked>> | 86% | 32,779 psi | 53% | 1765 fps | 95.1% |
| Norma 202 | <<locked>> | 80% | 26,876 psi | 43% | 1677 fps | 95.7% |
| Norma 203B | <<locked>> | 96% | 39,030 psi | 63% | 1913 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 98% | 42,192 psi | 68% | 1959 fps | 95.7% |
| Ramshot TAC | <<locked>> | 98% | 52,518 psi | 84% | 2028 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 90% | 38,870 psi | 62% | 1893 fps | 95.2% |
| Ramshot X-Terminator | <<locked>> | 86% | 39,073 psi | 63% | 1844 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,265 psi | 39% | 1056 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 48,689 psi | 78% | 1890 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 33,315 psi | 53% | 1772 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 41,553 psi | 67% | 1988 fps | 95.4% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 33,011 psi | 53% | 1847 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 30,560 psi | 49% | 1709 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 88% | 33,083 psi | 53% | 1765 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 98% | 35,041 psi | 56% | 1860 fps | 95.3% |
| Shooters World AR Plus | <<locked>> | 80% | 39,363 psi | 63% | 1870 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 28,558 psi | 46% | 1742 fps | 95.7% |
| Shooters World Precision | <<locked>> | 90% | 32,837 psi | 53% | 1785 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 35,215 psi | 56% | 1775 fps | 95.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 44,019 psi | 71% | 1667 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 36,883 psi | 59% | 1844 fps | 98.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 35,491 psi | 57% | 1788 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 98% | 49,530 psi | 79% | 2005 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 38,798 psi | 62% | 1883 fps | 95.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 29,399 psi | 47% | 1654 fps | 96.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 23,859 psi | 38% | 1558 fps | 95.2% |
| Somchem S321 | <<locked>> | 82% | 32,938 psi | 53% | 1791 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 28,543 psi | 46% | 1657 fps | 97.2% |
| Somchem S341 | <<locked>> | 92% | 40,190 psi | 64% | 1893 fps | 95.4% |
| Somchem S355 | <<locked>> | 98% | 36,767 psi | 59% | 1870 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 41,568 psi | 67% | 1798 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 33,489 psi | 54% | 1726 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 80% | 29,138 psi | 47% | 1663 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 80% | 24,308 psi | 39% | 1634 fps | 97.7% |
| Vihtavuori N140 | <<locked>> | 80% | 25,643 psi | 41% | 1634 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 94% | 31,430 psi | 50% | 1762 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 84% | 33,199 psi | 53% | 1768 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 82% | 26,078 psi | 42% | 1657 fps | 95% |
| Winchester 748 | <<locked>> | 84% | 31,763 psi | 51% | 1791 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 92% | 37,797 psi | 61% | 1883 fps | 95.7% |
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 88 powders for .458 Win.Mag. loaded with the .458 | 500gr | Speer AGS SP. Hodgdon CFE223 delivers the highest muzzle velocity at 2,146 fps; across all powders the maximum-charge window runs from 1,158 fps to 2,146 fps. Accurate 2015 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 500.0 gr projectile in 0.458" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. 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. Hodgdon CFE223, Alliant Power Pro 1200-R, Accurate 2200 rank at the top here: for .458 Win.Mag. with the .458 | 500gr | Speer AGS SP 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.