Load Specifications
Load data in caliber .458 Win.Mag. with .458 | 425gr | Rhino Penetrator bullet and 60 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% | 55,071 psi | 88% | 2129 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 47,195 psi | 76% | 2116 fps | 99.9% |
| Accurate 2460ᴾ | <<locked>> | 100% | 52,431 psi | 84% | 2201 fps | 99.2% |
| Accurate 2495ᴾ | <<locked>> | 100% | 35,056 psi | 56% | 2021 fps | 99.2% |
| Accurate 2520ᴾ | <<locked>> | 100% | 45,397 psi | 73% | 2156 fps | 98% |
| Accurate 4064ᴾ | <<locked>> | 100% | 32,764 psi | 53% | 1991 fps | 96.4% |
| Accurate LT-30 | <<locked>> | 96% | 55,143 psi | 88% | 2129 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 96% | 55,680 psi | 89% | 2136 fps | 99.1% |
| ADI AR 2205 | <<locked>> | 82% | 54,056 psi | 87% | 2005 fps | 100% |
| ADI AR 2207 | <<locked>> | 94% | 54,215 psi | 87% | 2156 fps | 100% |
| ADI AR 2219 | <<locked>> | 98% | 56,246 psi | 90% | 2257 fps | 99.9% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 46,673 psi | 75% | 2126 fps | 96.3% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 43,642 psi | 70% | 2139 fps | 100% |
| Alliant Power Pro 1200-Rᴾ | <<locked>> | 100% | 52,866 psi | 85% | 2280 fps | 97.1% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 54,215 psi | 87% | 2205 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 92% | 52,997 psi | 85% | 2133 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 96% | 53,142 psi | 85% | 2133 fps | 99.9% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 50,415 psi | 81% | 2133 fps | 97.6% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 43,424 psi | 70% | 2139 fps | 96.4% |
| Hodgdon CFE BLK | <<locked>> | 82% | 56,376 psi | 90% | 2188 fps | 97.9% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 53,983 psi | 87% | 2231 fps | 99.9% |
| Hodgdon H335ᴾ | <<locked>> | 100% | 55,259 psi | 89% | 2254 fps | 99.5% |
| Hodgdon H4198 | <<locked>> | 92% | 54,273 psi | 87% | 2133 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,908 psi | 51% | 1247 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 41,394 psi | 66% | 2126 fps | 99.3% |
| IMR 4198ᴾ | <<locked>> | 100% | 56,275 psi | 90% | 2178 fps | 100% |
| IMR 4227 | <<locked>> | 88% | 54,563 psi | 87% | 2093 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 46,673 psi | 75% | 2126 fps | 96.3% |
| Lovex D060 | <<locked>> | 82% | 54,201 psi | 87% | 2123 fps | 100% |
| Lovex D073.4 | <<locked>> | 94% | 54,012 psi | 87% | 2218 fps | 98.9% |
| Lovex D073.5ᴾ | <<locked>> | 100% | 52,504 psi | 84% | 2201 fps | 98.2% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 39,987 psi | 64% | 2090 fps | 96.9% |
| Lovex S053 | <<locked>> | 90% | 55,927 psi | 90% | 2083 fps | 100% |
| Norma 200 | <<locked>> | 96% | 54,795 psi | 88% | 2192 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 42,061 psi | 67% | 2093 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,676 psi | 51% | 1276 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 88% | 54,070 psi | 87% | 2126 fps | 100% |
| ReloadSwiss RS 40ᴾ | <<locked>> | 100% | 53,592 psi | 86% | 2211 fps | 98.8% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 46,528 psi | 75% | 2119 fps | 98.5% |
| Shooters World AR Plus | <<locked>> | 94% | 54,012 psi | 87% | 2218 fps | 98.9% |
| Shooters World Buffalo Rifle | <<locked>> | 82% | 54,201 psi | 87% | 2123 fps | 100% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 39,987 psi | 64% | 2090 fps | 96.9% |
| Shooters World SOCOM | <<locked>> | 82% | 55,448 psi | 89% | 2110 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 98% | 55,245 psi | 89% | 2188 fps | 97.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 94% | 56,362 psi | 90% | 1955 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 98% | 56,405 psi | 90% | 2260 fps | 99.6% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 55,825 psi | 90% | 2215 fps | 100% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 46,311 psi | 74% | 2060 fps | 98.4% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 37,014 psi | 59% | 1946 fps | 97.6% |
| Somchem S321ᴾ | <<locked>> | 100% | 50,691 psi | 81% | 2205 fps | 97.4% |
| Somchem S335ᴾ | <<locked>> | 100% | 44,237 psi | 71% | 2060 fps | 98.9% |
| Vihtavuori N110 | <<locked>> | 84% | 55,230 psi | 89% | 1998 fps | 100% |
| Vihtavuori N120 | <<locked>> | 94% | 54,360 psi | 87% | 2116 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 52,170 psi | 84% | 2133 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 45,252 psi | 73% | 2064 fps | 99.8% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 37,304 psi | 60% | 2031 fps | 99.3% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 39,958 psi | 64% | 2037 fps | 97.8% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 47,181 psi | 76% | 2126 fps | 96.4% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 38,464 psi | 62% | 2031 fps | 96.9% |
| Winchester 748ᴾ | <<locked>> | 100% | 45,078 psi | 72% | 2156 fps | 96.9% |
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% | 39,697 psi | 64% | 1942 fps | 99.8% |
| Accurate 2015 | <<locked>> | 80% | 25,454 psi | 41% | 1755 fps | 95.8% |
| Accurate 2460 | <<locked>> | 86% | 32,851 psi | 53% | 1923 fps | 95.2% |
| Accurate 2495 | <<locked>> | 88% | 23,656 psi | 38% | 1795 fps | 95.7% |
| Accurate 2520 | <<locked>> | 92% | 34,418 psi | 55% | 1988 fps | 95.3% |
| Accurate 4064 | <<locked>> | 98% | 30,792 psi | 49% | 1955 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 34,374 psi | 55% | 1847 fps | 97.2% |
| Accurate LT-32 | <<locked>> | 80% | 34,795 psi | 56% | 1847 fps | 95.1% |
| ADI AR 2205 | <<locked>> | 80% | 50,923 psi | 82% | 1972 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 35,534 psi | 57% | 1923 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 31,299 psi | 50% | 1893 fps | 96% |
| ADI Benchmark 8208 | <<locked>> | 96% | 41,365 psi | 66% | 2051 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 23,714 psi | 38% | 1765 fps | 97.4% |
| Alliant Power Pro 1200-R | <<locked>> | 94% | 43,598 psi | 70% | 2156 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 29,675 psi | 48% | 1850 fps | 98.4% |
| Alliant Reloder-7 | <<locked>> | 80% | 37,043 psi | 59% | 1926 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 32,169 psi | 52% | 1837 fps | 96.8% |
| Hodgdon Benchmark | <<locked>> | 92% | 39,784 psi | 64% | 1985 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 98% | 40,582 psi | 65% | 2096 fps | 95.6% |
| Hodgdon CFE BLK | <<locked>> | 80% | 52,620 psi | 84% | 2142 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 82% | 30,676 psi | 49% | 1880 fps | 95.7% |
| Hodgdon H335 | <<locked>> | 84% | 32,648 psi | 52% | 1929 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 80% | 37,898 psi | 61% | 1913 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,453 psi | 38% | 1112 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 27,108 psi | 43% | 1854 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 31,923 psi | 51% | 1847 fps | 99.4% |
| IMR 4227 | <<locked>> | 80% | 42,946 psi | 69% | 1962 fps | 100% |
| IMR 8208 XBR | <<locked>> | 96% | 41,365 psi | 66% | 2051 fps | 95% |
| Lovex D060 | <<locked>> | 80% | 51,111 psi | 82% | 2090 fps | 100% |
| Lovex D073.4 | 55.7 gr | 82% | 35,462 psi | 57% | 1965 fps | 95.3% |
| Lovex D073.5 | <<locked>> | 90% | 37,202 psi | 60% | 1998 fps | 95.1% |
| Lovex D073.6 | <<locked>> | 96% | 34,824 psi | 56% | 2005 fps | 95.4% |
| Lovex S053 | <<locked>> | 80% | 42,221 psi | 68% | 1929 fps | 100% |
| Norma 200 | <<locked>> | 80% | 33,431 psi | 54% | 1909 fps | 99.6% |
| Norma 202 | <<locked>> | 92% | 32,909 psi | 53% | 1939 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,235 psi | 37% | 1138 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 42,525 psi | 68% | 1991 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 36,593 psi | 59% | 1975 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 88% | 32,779 psi | 53% | 1900 fps | 95.2% |
| Shooters World AR Plus | 55.7 gr | 82% | 35,462 psi | 57% | 1965 fps | 95.3% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 51,111 psi | 82% | 2090 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 96% | 34,824 psi | 56% | 2005 fps | 95.4% |
| Shooters World SOCOM | <<locked>> | 80% | 51,764 psi | 83% | 2070 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 45,208 psi | 72% | 2067 fps | 95.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 39,276 psi | 63% | 1775 fps | 100% |
| SNPE Vectan SP 10 | 55.6 gr | 82% | 33,504 psi | 54% | 1939 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 30,458 psi | 49% | 1850 fps | 96.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 32,184 psi | 52% | 1844 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 29,283 psi | 47% | 1804 fps | 95% |
| Somchem S321 | <<locked>> | 94% | 41,423 psi | 66% | 2080 fps | 95.5% |
| Somchem S335 | <<locked>> | 86% | 29,269 psi | 47% | 1814 fps | 95.1% |
| Vihtavuori N110 | <<locked>> | 80% | 49,472 psi | 79% | 1942 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 35,752 psi | 57% | 1893 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 28,776 psi | 46% | 1788 fps | 97.9% |
| Vihtavuori N133 | <<locked>> | 80% | 25,106 psi | 40% | 1716 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 86% | 24,642 psi | 40% | 1775 fps | 95.4% |
| Vihtavuori N140 | <<locked>> | 92% | 31,444 psi | 50% | 1890 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 96% | 41,568 psi | 67% | 2051 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 96% | 34,026 psi | 55% | 1955 fps | 95.5% |
| Winchester 748 | <<locked>> | 96% | 39,610 psi | 64% | 2070 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 60 powders for .458 Win.Mag. loaded with the .458 | 425gr | Rhino Penetrator. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 2,280 fps; across all powders the maximum-charge window runs from 1,247 fps to 2,280 fps. Accurate 2015 gives the best case fill at 100 %, and 60 of the 60 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 425.0 gr projectile in 0.458" calls for a 1:6.0 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 | 425gr | Rhino Penetrator they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss 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.