Load Specifications
Load data in caliber .458 Win.Mag. with .458 | 500gr | MAKER 45-70 Subsonic Expanding bullet and 72 powders. The key underlying parameters are shown in the table above.
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% | 54,926 psi | 88% | 1916 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 51,227 psi | 82% | 1949 fps | 100% |
| Accurate 2200 | <<locked>> | 92% | 54,099 psi | 87% | 2008 fps | 96.9% |
| Accurate 2230 | <<locked>> | 92% | 54,157 psi | 87% | 2018 fps | 97.3% |
| Accurate 2460 | <<locked>> | 98% | 53,171 psi | 85% | 1998 fps | 99.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 38,957 psi | 62% | 1877 fps | 100% |
| Accurate 2520ᴾ | <<locked>> | 100% | 49,574 psi | 79% | 1995 fps | 99.5% |
| Accurate 4064ᴾ | <<locked>> | 100% | 36,318 psi | 58% | 1857 fps | 98.6% |
| Accurate LT-30 | <<locked>> | 94% | 55,274 psi | 89% | 1923 fps | 100% |
| Accurate LT-32 | <<locked>> | 94% | 55,811 psi | 89% | 1932 fps | 99.8% |
| ADI AR 2206Hᴾ | <<locked>> | 100% | 47,079 psi | 75% | 1955 fps | 96.6% |
| ADI AR 2207 | <<locked>> | 92% | 55,114 psi | 88% | 1942 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 53,156 psi | 85% | 2008 fps | 100% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 50,314 psi | 81% | 1969 fps | 98.3% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 47,268 psi | 76% | 1969 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 98% | 53,853 psi | 86% | 2073 fps | 98.5% |
| Alliant Reloder-10x | <<locked>> | 98% | 55,317 psi | 89% | 1995 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 90% | 53,635 psi | 86% | 1926 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 53,388 psi | 86% | 1929 fps | 100% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 53,780 psi | 86% | 1965 fps | 99.1% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 47,181 psi | 76% | 1988 fps | 98.5% |
| Hodgdon CFE223ᴾ | <<locked>> | 100% | 53,388 psi | 86% | 2080 fps | 97.1% |
| Hodgdon H322 | <<locked>> | 98% | 54,563 psi | 87% | 2021 fps | 100% |
| Hodgdon H335 | <<locked>> | 98% | 55,796 psi | 89% | 2044 fps | 100% |
| Hodgdon H4198 | <<locked>> | 90% | 54,433 psi | 87% | 1926 fps | 100% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 47,297 psi | 76% | 1965 fps | 97.3% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 42,627 psi | 68% | 1936 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,430 psi | 52% | 1122 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 46,543 psi | 75% | 1936 fps | 96.9% |
| IMR 3031ᴾ | <<locked>> | 100% | 44,744 psi | 72% | 1965 fps | 100% |
| IMR 4198 | <<locked>> | 96% | 53,737 psi | 86% | 1936 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 54,737 psi | 88% | 1883 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 50,314 psi | 81% | 1969 fps | 98.3% |
| Lovex D073.4 | <<locked>> | 92% | 54,650 psi | 88% | 2011 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 98% | 53,563 psi | 86% | 2005 fps | 99.3% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 43,743 psi | 70% | 1942 fps | 98.8% |
| Lovex S053 | <<locked>> | 88% | 56,188 psi | 90% | 1870 fps | 100% |
| Lovex S060ᴾ | <<locked>> | 100% | 49,472 psi | 79% | 1913 fps | 96.9% |
| Lovex S062ᴾ | <<locked>> | 100% | 40,509 psi | 65% | 1867 fps | 96.7% |
| Norma 200 | <<locked>> | 94% | 55,651 psi | 89% | 1978 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 45,890 psi | 74% | 1923 fps | 97.7% |
| Norma 202ᴾ | <<locked>> | 100% | 45,730 psi | 73% | 1939 fps | 99.5% |
| Ramshot Wild Boarᴾ | <<locked>> | 100% | 49,400 psi | 79% | 1988 fps | 96.9% |
| Ramshot X-Terminatorᴾ | <<locked>> | 100% | 56,362 psi | 90% | 2011 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,387 psi | 52% | 1152 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 54,389 psi | 87% | 1913 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 98% | 54,172 psi | 87% | 2008 fps | 99.6% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 50,183 psi | 80% | 1955 fps | 99.7% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 43,279 psi | 69% | 1883 fps | 97.2% |
| Shooters World AR Plus | <<locked>> | 92% | 54,650 psi | 88% | 2011 fps | 99.7% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 43,743 psi | 70% | 1942 fps | 98.8% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 40,509 psi | 65% | 1867 fps | 96.7% |
| Shooters World Tactical Rifle | <<locked>> | 96% | 55,724 psi | 89% | 1988 fps | 98.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 53,925 psi | 86% | 1732 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 53,534 psi | 86% | 2014 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 53,316 psi | 85% | 1969 fps | 100% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 45,542 psi | 73% | 1932 fps | 96.1% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 49,705 psi | 80% | 1900 fps | 99.6% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 39,697 psi | 64% | 1798 fps | 99.2% |
| Somchem S321ᴾ | <<locked>> | 100% | 54,781 psi | 88% | 2041 fps | 99.1% |
| Somchem S335ᴾ | <<locked>> | 100% | 47,616 psi | 76% | 1900 fps | 99.8% |
| Somchem S341ᴾ | <<locked>> | 100% | 47,790 psi | 77% | 1949 fps | 96.3% |
| Vihtavuori N110 | <<locked>> | 82% | 55,550 psi | 89% | 1791 fps | 100% |
| Vihtavuori N120 | <<locked>> | 92% | 55,201 psi | 89% | 1903 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 55,854 psi | 90% | 1952 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 48,747 psi | 78% | 1900 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 40,640 psi | 65% | 1877 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 43,294 psi | 69% | 1890 fps | 99.4% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 51,111 psi | 82% | 1972 fps | 98.4% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 41,582 psi | 67% | 1886 fps | 98.8% |
| Winchester 748ᴾ | <<locked>> | 100% | 48,718 psi | 78% | 2001 fps | 98.8% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 44,672 psi | 72% | 1939 fps | 96.6% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 42,525 psi | 68% | 1788 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 27,775 psi | 45% | 1631 fps | 98.1% |
| Accurate 2200 | <<locked>> | 86% | 44,657 psi | 72% | 1896 fps | 95% |
| Accurate 2230 | <<locked>> | 86% | 43,743 psi | 70% | 1896 fps | 95.2% |
| Accurate 2460 | <<locked>> | 80% | 29,370 psi | 47% | 1680 fps | 95.7% |
| Accurate 2495 | <<locked>> | 80% | 20,363 psi | 33% | 1542 fps | 95.7% |
| Accurate 2520 | <<locked>> | 84% | 28,906 psi | 46% | 1706 fps | 95.1% |
| Accurate 4064 | <<locked>> | 88% | 24,961 psi | 40% | 1654 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 36,593 psi | 59% | 1703 fps | 98.8% |
| Accurate LT-32 | <<locked>> | 80% | 36,999 psi | 59% | 1706 fps | 97.3% |
| ADI AR 2206H | <<locked>> | 96% | 41,800 psi | 67% | 1886 fps | 95.4% |
| ADI AR 2207 | <<locked>> | 80% | 38,276 psi | 61% | 1762 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 33,707 psi | 54% | 1759 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 90% | 37,072 psi | 59% | 1798 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 25,570 psi | 41% | 1644 fps | 99.4% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 36,825 psi | 59% | 1854 fps | 95% |
| Alliant Reloder-10x | <<locked>> | 80% | 31,995 psi | 51% | 1709 fps | 99.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 39,740 psi | 64% | 1772 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 34,432 psi | 55% | 1699 fps | 98.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 33,562 psi | 54% | 1699 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 90% | 33,982 psi | 54% | 1801 fps | 95.4% |
| Hodgdon CFE223 | <<locked>> | 96% | 46,905 psi | 75% | 2005 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 80% | 30,966 psi | 50% | 1709 fps | 97.5% |
| Hodgdon H335 | <<locked>> | 80% | 30,850 psi | 49% | 1716 fps | 96.4% |
| Hodgdon H4198 | <<locked>> | 80% | 40,321 psi | 65% | 1762 fps | 99% |
| Hodgdon H4895 | <<locked>> | 94% | 39,407 psi | 63% | 1860 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 37,768 psi | 61% | 1864 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,888 psi | 38% | 1001 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 38,841 psi | 62% | 1831 fps | 95% |
| IMR 3031 | <<locked>> | 80% | 24,410 psi | 39% | 1621 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 34,026 psi | 55% | 1699 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 45,730 psi | 73% | 1791 fps | 100% |
| IMR 8208 XBR | <<locked>> | 90% | 37,072 psi | 59% | 1798 fps | 95.5% |
| Lovex D073.4 | <<locked>> | 80% | 36,071 psi | 58% | 1788 fps | 97.1% |
| Lovex D073.5 | <<locked>> | 84% | 33,243 psi | 53% | 1745 fps | 95.6% |
| Lovex D073.6 | <<locked>> | 88% | 29,414 psi | 47% | 1726 fps | 95.2% |
| Lovex S053 | <<locked>> | 80% | 44,759 psi | 72% | 1759 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 41,655 psi | 67% | 1818 fps | 95.1% |
| Lovex S062 | <<locked>> | 96% | 35,853 psi | 57% | 1798 fps | 95.4% |
| Norma 200 | <<locked>> | 80% | 36,245 psi | 58% | 1759 fps | 100% |
| Norma 201 | <<locked>> | 92% | 36,013 psi | 58% | 1785 fps | 95.4% |
| Norma 202 | <<locked>> | 84% | 27,949 psi | 45% | 1667 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 96% | 43,236 psi | 69% | 1913 fps | 95.5% |
| Ramshot X-Terminator | <<locked>> | 92% | 43,787 psi | 70% | 1870 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,801 psi | 38% | 1024 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 45,252 psi | 73% | 1821 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 30,560 psi | 49% | 1690 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 28,181 psi | 45% | 1631 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 94% | 36,245 psi | 58% | 1781 fps | 95.4% |
| Shooters World AR Plus | <<locked>> | 80% | 36,071 psi | 58% | 1788 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 88% | 29,414 psi | 47% | 1726 fps | 95.2% |
| Shooters World Precision | <<locked>> | 96% | 35,853 psi | 57% | 1798 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 39,755 psi | 64% | 1804 fps | 95.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 41,524 psi | 67% | 1614 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 33,765 psi | 54% | 1759 fps | 97.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 32,605 psi | 52% | 1709 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 98% | 42,844 psi | 69% | 1900 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 28,921 psi | 46% | 1611 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 26,324 psi | 42% | 1578 fps | 95.6% |
| Somchem S321 | <<locked>> | 86% | 34,403 psi | 55% | 1781 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 26,353 psi | 42% | 1585 fps | 95.6% |
| Somchem S341 | <<locked>> | 98% | 44,730 psi | 72% | 1909 fps | 95.6% |
| Vihtavuori N110 | <<locked>> | 80% | 52,214 psi | 84% | 1762 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 38,464 psi | 62% | 1732 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 30,879 psi | 50% | 1650 fps | 99.4% |
| Vihtavuori N133 | <<locked>> | 80% | 26,861 psi | 43% | 1588 fps | 97.6% |
| Vihtavuori N135 | <<locked>> | 80% | 22,249 psi | 36% | 1552 fps | 96% |
| Vihtavuori N140 | <<locked>> | 84% | 26,658 psi | 43% | 1621 fps | 95% |
| Vihtavuori N530 | <<locked>> | 90% | 36,970 psi | 59% | 1795 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 88% | 28,834 psi | 46% | 1683 fps | 95.4% |
| Winchester 748 | <<locked>> | 88% | 33,301 psi | 53% | 1778 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 96% | 39,291 psi | 63% | 1864 fps | 95.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 72 powders for .458 Win.Mag. loaded with the .458 | 500gr | MAKER 45-70 Subsonic Expanding. Hodgdon CFE223 delivers the highest muzzle velocity at 2,080 fps; across all powders the maximum-charge window runs from 1,122 fps to 2,080 fps. Accurate 2015 gives the best case fill at 100 %, and 72 of the 72 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. The 500.0 gr projectile in 0.458" calls for a 1:24.0 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 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.