Load Specifications
Load data in caliber .458 Win.Mag. with .458 | 450gr | Barnes X S bullet and 66 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, SNPE Vectan SP 10 and ADI AR 2219.
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% | 55,114 psi | 88% | 2031 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 51,938 psi | 83% | 2067 fps | 100% |
| Accurate 2200 | <<locked>> | 92% | 54,375 psi | 87% | 2123 fps | 95.8% |
| Accurate 2230 | <<locked>> | 92% | 54,563 psi | 87% | 2129 fps | 96.2% |
| Accurate 2460 | <<locked>> | 98% | 54,056 psi | 87% | 2116 fps | 99.4% |
| Accurate 2495ᴾ | <<locked>> | 100% | 40,872 psi | 66% | 2001 fps | 99.8% |
| Accurate 2520ᴾ | <<locked>> | 100% | 50,024 psi | 80% | 2110 fps | 98.9% |
| Accurate 4064ᴾ | <<locked>> | 100% | 38,116 psi | 61% | 1978 fps | 98% |
| Accurate LT-30 | <<locked>> | 94% | 55,332 psi | 89% | 2037 fps | 100% |
| Accurate LT-32 | <<locked>> | 94% | 55,883 psi | 90% | 2044 fps | 99.3% |
| ADI AR 2207 | <<locked>> | 92% | 55,448 psi | 89% | 2064 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 53,011 psi | 85% | 2123 fps | 99.9% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 50,546 psi | 81% | 2080 fps | 97.4% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 47,601 psi | 76% | 2087 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 98% | 54,012 psi | 87% | 2192 fps | 97.6% |
| Alliant Reloder-10x | <<locked>> | 98% | 55,550 psi | 89% | 2113 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 90% | 54,157 psi | 87% | 2044 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 53,432 psi | 86% | 2041 fps | 100% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 54,172 psi | 87% | 2080 fps | 98.4% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 47,601 psi | 76% | 2100 fps | 97.5% |
| Hodgdon CFE223ᴾ | <<locked>> | 100% | 53,447 psi | 86% | 2192 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 98% | 54,447 psi | 87% | 2139 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 98% | 55,753 psi | 89% | 2159 fps | 99.7% |
| Hodgdon H4198 | <<locked>> | 90% | 54,476 psi | 87% | 2037 fps | 99.8% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 47,718 psi | 77% | 2077 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,967 psi | 53% | 1198 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 46,862 psi | 75% | 2041 fps | 95.7% |
| IMR 3031ᴾ | <<locked>> | 100% | 45,498 psi | 73% | 2083 fps | 99.8% |
| IMR 4198 | <<locked>> | 96% | 53,722 psi | 86% | 2054 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 54,752 psi | 88% | 1998 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 50,546 psi | 81% | 2080 fps | 97.4% |
| Lovex D073.4 | <<locked>> | 92% | 55,274 psi | 89% | 2129 fps | 99.2% |
| Lovex D073.5 | <<locked>> | 98% | 54,172 psi | 87% | 2119 fps | 98.7% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 44,512 psi | 71% | 2054 fps | 98.1% |
| Lovex S053 | <<locked>> | 86% | 53,577 psi | 86% | 1959 fps | 100% |
| Lovex S060ᴾ | <<locked>> | 100% | 50,096 psi | 80% | 2024 fps | 95.8% |
| Lovex S062ᴾ | <<locked>> | 100% | 41,568 psi | 67% | 1978 fps | 95.6% |
| Norma 200 | <<locked>> | 92% | 53,621 psi | 86% | 2073 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 46,992 psi | 75% | 2034 fps | 96.8% |
| Norma 202ᴾ | <<locked>> | 100% | 46,151 psi | 74% | 2051 fps | 98.9% |
| Ramshot X-Terminatorᴾ | <<locked>> | 100% | 56,376 psi | 90% | 2123 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,011 psi | 53% | 1227 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 54,549 psi | 87% | 2031 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 98% | 54,244 psi | 87% | 2123 fps | 99% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 51,735 psi | 83% | 2077 fps | 99.3% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 44,498 psi | 71% | 1995 fps | 96.2% |
| Shooters World AR Plus | <<locked>> | 92% | 55,274 psi | 89% | 2129 fps | 99.2% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 44,512 psi | 71% | 2054 fps | 98.1% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 41,568 psi | 67% | 1978 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 96% | 55,695 psi | 89% | 2096 fps | 97.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 54,186 psi | 87% | 1844 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 53,708 psi | 86% | 2129 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 98% | 56,275 psi | 90% | 2116 fps | 100% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 50,183 psi | 80% | 2011 fps | 99.1% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 40,451 psi | 65% | 1906 fps | 98.6% |
| Somchem S321ᴾ | <<locked>> | 100% | 55,100 psi | 88% | 2156 fps | 98.3% |
| Somchem S335ᴾ | <<locked>> | 100% | 48,486 psi | 78% | 2014 fps | 99.5% |
| Vihtavuori N110 | <<locked>> | 82% | 55,985 psi | 90% | 1906 fps | 100% |
| Vihtavuori N120 | <<locked>> | 92% | 55,477 psi | 89% | 2024 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 56,231 psi | 90% | 2073 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 49,052 psi | 79% | 2011 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 41,481 psi | 67% | 1991 fps | 99.8% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 43,932 psi | 70% | 1998 fps | 98.7% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 51,285 psi | 82% | 2080 fps | 97.5% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 42,438 psi | 68% | 1998 fps | 98.1% |
| Winchester 748ᴾ | <<locked>> | 100% | 48,950 psi | 78% | 2110 fps | 98% |
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% | 43,192 psi | 69% | 1896 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 29,573 psi | 47% | 1742 fps | 97.6% |
| Accurate 2200 | <<locked>> | 90% | 51,242 psi | 82% | 2083 fps | 95.1% |
| Accurate 2230 | <<locked>> | 90% | 51,053 psi | 82% | 2090 fps | 95.5% |
| Accurate 2460 | <<locked>> | 82% | 33,040 psi | 53% | 1824 fps | 95.6% |
| Accurate 2495 | <<locked>> | 80% | 22,945 psi | 37% | 1667 fps | 95.5% |
| Accurate 2520 | <<locked>> | 88% | 34,301 psi | 55% | 1886 fps | 95.6% |
| Accurate 4064 | <<locked>> | 90% | 28,718 psi | 46% | 1808 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 37,376 psi | 60% | 1804 fps | 98.2% |
| Accurate LT-32 | <<locked>> | 80% | 37,768 psi | 61% | 1808 fps | 96.4% |
| ADI AR 2207 | <<locked>> | 80% | 39,407 psi | 63% | 1880 fps | 100% |
| ADI AR 2219 | 50.5 gr | 80% | 34,664 psi | 56% | 1864 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 92% | 40,132 psi | 64% | 1936 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 27,006 psi | 43% | 1752 fps | 99% |
| Alliant Power Pro 1200-R | 55 gr | 90% | 42,380 psi | 68% | 2037 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 33,475 psi | 54% | 1821 fps | 99.4% |
| Alliant Reloder-7 | <<locked>> | 80% | 40,872 psi | 66% | 1883 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 35,259 psi | 57% | 1801 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 88% | 38,841 psi | 62% | 1877 fps | 95.3% |
| Hodgdon BL-C2 | <<locked>> | 92% | 37,246 psi | 60% | 1949 fps | 95% |
| Hodgdon CFE223 | <<locked>> | 98% | 50,241 psi | 81% | 2149 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 32,010 psi | 51% | 1814 fps | 96.6% |
| Hodgdon H335 | <<locked>> | 80% | 32,010 psi | 51% | 1821 fps | 95.4% |
| Hodgdon H4198 | <<locked>> | 80% | 40,930 psi | 66% | 1867 fps | 98.4% |
| Hodgdon H4895 | <<locked>> | 96% | 42,670 psi | 68% | 2005 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,613 psi | 39% | 1070 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 44,367 psi | 71% | 2005 fps | 95.1% |
| IMR 3031 | <<locked>> | 82% | 27,383 psi | 44% | 1762 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 35,070 psi | 56% | 1808 fps | 99.9% |
| IMR 4227 | <<locked>> | 80% | 46,369 psi | 74% | 1906 fps | 100% |
| IMR 8208 XBR | <<locked>> | 92% | 40,132 psi | 64% | 1936 fps | 95% |
| Lovex D073.4 | <<locked>> | 80% | 37,405 psi | 60% | 1896 fps | 96.2% |
| Lovex D073.5 | <<locked>> | 86% | 37,101 psi | 59% | 1896 fps | 95.4% |
| Lovex D073.6 | <<locked>> | 90% | 32,779 psi | 53% | 1870 fps | 95% |
| Lovex S053 | <<locked>> | 80% | 45,788 psi | 73% | 1873 fps | 100% |
| Lovex S060 | <<locked>> | 98% | 47,340 psi | 76% | 1988 fps | 95.2% |
| Lovex S062 | <<locked>> | 98% | 39,262 psi | 63% | 1942 fps | 95% |
| Norma 200 | <<locked>> | 80% | 38,101 psi | 61% | 1877 fps | 100% |
| Norma 201 | <<locked>> | 94% | 39,639 psi | 64% | 1932 fps | 95% |
| Norma 202 | <<locked>> | 86% | 31,024 psi | 50% | 1808 fps | 95.2% |
| Ramshot X-Terminator | <<locked>> | 96% | 49,995 psi | 80% | 2047 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,598 psi | 39% | 1096 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 46,035 psi | 74% | 1936 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 35,897 psi | 58% | 1870 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 82% | 32,053 psi | 51% | 1778 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 96% | 39,856 psi | 64% | 1926 fps | 95% |
| Shooters World AR Plus | <<locked>> | 80% | 37,405 psi | 60% | 1896 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 90% | 32,779 psi | 53% | 1870 fps | 95% |
| Shooters World Precision | <<locked>> | 98% | 39,262 psi | 63% | 1942 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 43,207 psi | 69% | 1946 fps | 95.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 42,424 psi | 68% | 1719 fps | 100% |
| SNPE Vectan SP 10 | 52.2 gr | 80% | 34,838 psi | 56% | 1867 fps | 96.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 33,707 psi | 54% | 1814 fps | 98% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 32,082 psi | 51% | 1749 fps | 95.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 29,225 psi | 47% | 1713 fps | 95.4% |
| Somchem S321 | <<locked>> | 90% | 40,219 psi | 64% | 1965 fps | 95.5% |
| Somchem S335 | <<locked>> | 82% | 29,559 psi | 47% | 1722 fps | 95.5% |
| Vihtavuori N110 | <<locked>> | 80% | 53,127 psi | 85% | 1880 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 39,450 psi | 63% | 1847 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 32,242 psi | 52% | 1759 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 80% | 28,210 psi | 45% | 1693 fps | 96.9% |
| Vihtavuori N135 | <<locked>> | 80% | 24,004 psi | 38% | 1660 fps | 95.4% |
| Vihtavuori N140 | <<locked>> | 88% | 31,343 psi | 50% | 1795 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 92% | 40,059 psi | 64% | 1932 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 90% | 31,807 psi | 51% | 1821 fps | 95.1% |
| Winchester 748 | <<locked>> | 92% | 38,653 psi | 62% | 1959 fps | 95.5% |
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 66 powders for .458 Win.Mag. loaded with the .458 | 450gr | Barnes X S. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 2,192 fps; across all powders the maximum-charge window runs from 1,198 fps to 2,192 fps. Accurate 2015 gives the best case fill at 100 %, and 66 of the 66 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 450.0 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. Alliant Power Pro 1200-R, SNPE Vectan SP 10, ADI AR 2219 rank at the top here: for .458 Win.Mag. with the .458 | 450gr | Barnes X S 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.