Load Specifications
Load data in caliber .458 Win.Mag. with .458 | 450gr | Barnes TSX FB bullet and 63 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are SNPE Vectan SP 10, Shooters World AR Plus and Lovex D073.4.
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>> | 90% | 53,505 psi | 86% | 2028 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 45,498 psi | 73% | 2014 fps | 99.9% |
| Accurate 2200 | <<locked>> | 96% | 55,840 psi | 90% | 2146 fps | 95.9% |
| Accurate 2230 | <<locked>> | 96% | 55,738 psi | 89% | 2156 fps | 96.3% |
| Accurate 2460ᴾ | <<locked>> | 100% | 50,575 psi | 81% | 2096 fps | 99.1% |
| Accurate 2495ᴾ | <<locked>> | 100% | 33,112 psi | 53% | 1919 fps | 99% |
| Accurate 2520ᴾ | <<locked>> | 100% | 43,526 psi | 70% | 2047 fps | 97.9% |
| Accurate 4064ᴾ | <<locked>> | 100% | 31,009 psi | 50% | 1890 fps | 96.2% |
| Accurate LT-30 | <<locked>> | 96% | 53,650 psi | 86% | 2021 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 96% | 54,201 psi | 87% | 2031 fps | 99.1% |
| ADI AR 2205 | <<locked>> | 84% | 55,999 psi | 90% | 1939 fps | 100% |
| ADI AR 2207 | <<locked>> | 96% | 56,028 psi | 90% | 2087 fps | 100% |
| ADI AR 2219 | <<locked>> | 98% | 54,694 psi | 88% | 2149 fps | 99.9% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 45,382 psi | 73% | 2028 fps | 96.3% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 42,032 psi | 67% | 2034 fps | 100% |
| Alliant Power Pro 1200-Rᴾ | <<locked>> | 100% | 50,894 psi | 82% | 2162 fps | 97% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 52,678 psi | 84% | 2100 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 94% | 54,694 psi | 88% | 2064 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 98% | 55,216 psi | 89% | 2067 fps | 100% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 48,994 psi | 79% | 2031 fps | 97.6% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 41,901 psi | 67% | 2037 fps | 96.3% |
| Hodgdon CFE BLK | <<locked>> | 82% | 54,969 psi | 88% | 2083 fps | 97.9% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 52,359 psi | 84% | 2126 fps | 99.8% |
| Hodgdon H335ᴾ | <<locked>> | 100% | 53,679 psi | 86% | 2149 fps | 99.5% |
| Hodgdon H4198 | <<locked>> | 94% | 56,362 psi | 90% | 2067 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,473 psi | 50% | 1188 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 39,827 psi | 64% | 2021 fps | 99.2% |
| IMR 4198ᴾ | <<locked>> | 100% | 54,984 psi | 88% | 2077 fps | 100% |
| IMR 4227 | <<locked>> | 88% | 53,345 psi | 86% | 1995 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 45,382 psi | 73% | 2028 fps | 96.3% |
| Lovex D060 | <<locked>> | 84% | 56,391 psi | 90% | 2060 fps | 100% |
| Lovex D063 | <<locked>> | 82% | 54,128 psi | 87% | 2008 fps | 100% |
| Lovex D073.4 | <<locked>> | 96% | 56,086 psi | 90% | 2152 fps | 99.2% |
| Lovex D073.5ᴾ | <<locked>> | 100% | 50,589 psi | 81% | 2096 fps | 98.2% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 38,174 psi | 61% | 1985 fps | 96.7% |
| Lovex S053 | <<locked>> | 90% | 54,505 psi | 87% | 1982 fps | 100% |
| Norma 200 | <<locked>> | 98% | 56,173 psi | 90% | 2119 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 40,553 psi | 65% | 1991 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,212 psi | 50% | 1217 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 90% | 56,043 psi | 90% | 2057 fps | 100% |
| ReloadSwiss RS 40ᴾ | <<locked>> | 100% | 51,909 psi | 83% | 2106 fps | 98.7% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 44,541 psi | 71% | 2014 fps | 98.4% |
| Shooters World AR Plus | <<locked>> | 96% | 56,086 psi | 90% | 2152 fps | 99.2% |
| Shooters World Buffalo Rifle | <<locked>> | 84% | 56,391 psi | 90% | 2060 fps | 100% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 38,174 psi | 61% | 1985 fps | 96.7% |
| Shooters World SOCOM | <<locked>> | 82% | 53,824 psi | 86% | 2001 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 98% | 53,722 psi | 86% | 2083 fps | 97.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 94% | 55,303 psi | 89% | 1867 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 98% | 54,911 psi | 88% | 2156 fps | 99.6% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 43,772 psi | 70% | 1965 fps | 99.8% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 44,773 psi | 72% | 1962 fps | 98.4% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 35,694 psi | 57% | 1850 fps | 97.5% |
| Somchem S321ᴾ | <<locked>> | 100% | 48,878 psi | 78% | 2096 fps | 97.4% |
| Somchem S335ᴾ | <<locked>> | 100% | 42,786 psi | 69% | 1962 fps | 98.8% |
| Vihtavuori N110 | <<locked>> | 84% | 54,012 psi | 87% | 1903 fps | 100% |
| Vihtavuori N120 | <<locked>> | 96% | 56,072 psi | 90% | 2044 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 50,531 psi | 81% | 2028 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 43,772 psi | 70% | 1965 fps | 99.8% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 35,404 psi | 57% | 1919 fps | 99.1% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 38,609 psi | 62% | 1939 fps | 97.7% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 45,629 psi | 73% | 2024 fps | 96.4% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 37,115 psi | 60% | 1932 fps | 96.8% |
| Winchester 748ᴾ | <<locked>> | 100% | 43,714 psi | 70% | 2051 fps | 96.8% |
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% | 38,624 psi | 62% | 1850 fps | 99.8% |
| Accurate 2015 | <<locked>> | 80% | 24,105 psi | 39% | 1663 fps | 95.6% |
| Accurate 2200 | <<locked>> | 94% | 52,301 psi | 84% | 2106 fps | 95.3% |
| Accurate 2230 | <<locked>> | 94% | 51,808 psi | 83% | 2113 fps | 95.6% |
| Accurate 2460 | <<locked>> | 86% | 31,227 psi | 50% | 1824 fps | 95% |
| Accurate 2495 | <<locked>> | 88% | 21,843 psi | 35% | 1693 fps | 95.2% |
| Accurate 2520 | <<locked>> | 92% | 32,924 psi | 53% | 1890 fps | 95.2% |
| Accurate 4064 | <<locked>> | 98% | 28,964 psi | 46% | 1854 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 32,909 psi | 53% | 1745 fps | 96.9% |
| Accurate LT-32 | <<locked>> | 82% | 35,549 psi | 57% | 1785 fps | 95.5% |
| ADI AR 2205 | <<locked>> | 80% | 49,603 psi | 80% | 1877 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 34,272 psi | 55% | 1831 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 30,153 psi | 48% | 1801 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 98% | 42,612 psi | 68% | 1988 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 80% | 22,510 psi | 36% | 1670 fps | 97.2% |
| Alliant Power Pro 1200-R | <<locked>> | 96% | 44,585 psi | 71% | 2083 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 28,311 psi | 45% | 1759 fps | 98.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 35,592 psi | 57% | 1831 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 31,009 psi | 50% | 1749 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 92% | 38,392 psi | 62% | 1886 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 98% | 39,102 psi | 63% | 1998 fps | 95.5% |
| Hodgdon CFE BLK | <<locked>> | 80% | 51,358 psi | 82% | 2041 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 82% | 29,370 psi | 47% | 1785 fps | 95.5% |
| Hodgdon H335 | <<locked>> | 84% | 31,372 psi | 50% | 1834 fps | 95.1% |
| Hodgdon H4198 | <<locked>> | 80% | 36,738 psi | 59% | 1818 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,945 psi | 37% | 1056 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 27,572 psi | 44% | 1798 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 30,821 psi | 49% | 1755 fps | 99.4% |
| IMR 4227 | <<locked>> | 80% | 41,858 psi | 67% | 1867 fps | 100% |
| IMR 8208 XBR | <<locked>> | 98% | 42,612 psi | 68% | 1988 fps | 95.6% |
| Lovex D060 | <<locked>> | 80% | 50,299 psi | 81% | 1991 fps | 100% |
| Lovex D063 | <<locked>> | 80% | 50,792 psi | 81% | 1975 fps | 100% |
| Lovex D073.4 | 52.6 gr | 82% | 33,968 psi | 54% | 1867 fps | 95.2% |
| Lovex D073.5 | <<locked>> | 92% | 38,218 psi | 61% | 1939 fps | 95.7% |
| Lovex D073.6 | <<locked>> | 96% | 33,272 psi | 53% | 1906 fps | 95.2% |
| Lovex S053 | <<locked>> | 80% | 40,857 psi | 66% | 1834 fps | 100% |
| Norma 200 | <<locked>> | 80% | 31,720 psi | 51% | 1811 fps | 99.5% |
| Norma 202 | <<locked>> | 92% | 31,546 psi | 51% | 1844 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,698 psi | 36% | 1079 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 41,205 psi | 66% | 1893 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 35,244 psi | 57% | 1880 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 90% | 33,054 psi | 53% | 1837 fps | 95.7% |
| Shooters World AR Plus | 52.6 gr | 82% | 33,968 psi | 54% | 1867 fps | 95.2% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 50,299 psi | 81% | 1991 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 96% | 33,272 psi | 53% | 1906 fps | 95.2% |
| Shooters World SOCOM | <<locked>> | 80% | 50,488 psi | 81% | 1969 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 43,700 psi | 70% | 1965 fps | 95.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 38,232 psi | 61% | 1690 fps | 100% |
| SNPE Vectan SP 10 | 52.4 gr | 82% | 32,068 psi | 51% | 1841 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 25,469 psi | 41% | 1660 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 32,750 psi | 53% | 1785 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 29,791 psi | 48% | 1749 fps | 95.6% |
| Somchem S321 | <<locked>> | 94% | 39,914 psi | 64% | 1978 fps | 95.4% |
| Somchem S335 | <<locked>> | 88% | 29,573 psi | 47% | 1755 fps | 95.6% |
| Vihtavuori N110 | <<locked>> | 80% | 47,993 psi | 77% | 1847 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 34,563 psi | 55% | 1801 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 27,514 psi | 44% | 1699 fps | 97.7% |
| Vihtavuori N133 | <<locked>> | 82% | 25,469 psi | 41% | 1660 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 88% | 24,613 psi | 39% | 1709 fps | 95.7% |
| Vihtavuori N140 | <<locked>> | 92% | 30,240 psi | 48% | 1798 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 96% | 40,001 psi | 64% | 1949 fps | 95% |
| Vihtavuori N540 | <<locked>> | 96% | 32,648 psi | 52% | 1857 fps | 95.4% |
| Winchester 748 | <<locked>> | 96% | 38,377 psi | 62% | 1972 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 88 powders for .458 Win.Mag. loaded with the .458 | 450gr | Barnes TSX FB. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 2,162 fps; across all powders the maximum-charge window runs from 1,188 fps to 2,162 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 49–90 %, leaving at least 10 % headroom. The 450.0 gr projectile in 0.458" calls for a 1:23.0 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. SNPE Vectan SP 10, Shooters World AR Plus, Lovex D073.4 rank at the top here: for .458 Win.Mag. with the .458 | 450gr | Barnes TSX FB they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2206H, Alliant Reloder- TS 15.5, Alliant Reloder-15 burn incompletely and react more sensitively to barrel length and temperature. 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.