Load Specifications
Load data in caliber .458 Win.Mag. with .458 | 465gr | A-Square MONO RN bullet and 89 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.
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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>> | 84% | 53,911 psi | 86% | 2077 fps | 100% |
| Accurate 2015 | <<locked>> | 98% | 55,303 psi | 89% | 2159 fps | 100% |
| Accurate 2200 | <<locked>> | 88% | 53,983 psi | 87% | 2195 fps | 97.8% |
| Accurate 2230 | <<locked>> | 88% | 54,273 psi | 87% | 2205 fps | 98.1% |
| Accurate 2460 | <<locked>> | 94% | 54,128 psi | 87% | 2182 fps | 100% |
| Accurate 2495ᴾ | <<locked>> | 100% | 46,905 psi | 75% | 2129 fps | 100% |
| Accurate 2520 | <<locked>> | 98% | 54,520 psi | 87% | 2221 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 43,555 psi | 70% | 2113 fps | 99.8% |
| Accurate LT-30 | <<locked>> | 90% | 54,781 psi | 88% | 2093 fps | 100% |
| Accurate LT-32 | <<locked>> | 90% | 55,216 psi | 89% | 2106 fps | 100% |
| ADI AR 2206Hᴾ | <<locked>> | 100% | 54,186 psi | 87% | 2221 fps | 98.6% |
| ADI AR 2207 | <<locked>> | 88% | 55,172 psi | 88% | 2110 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 45,992 psi | 74% | 2093 fps | 96.3% |
| ADI AR 2219 | <<locked>> | 90% | 53,359 psi | 86% | 2185 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 98% | 54,143 psi | 87% | 2192 fps | 99.3% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 55,216 psi | 89% | 2218 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 94% | 55,071 psi | 88% | 2274 fps | 99.2% |
| Alliant Power Pro 2000-MRᴾ | <<locked>> | 100% | 50,763 psi | 81% | 2251 fps | 96.8% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 43,729 psi | 70% | 2110 fps | 97.8% |
| Alliant Reloder-10x | <<locked>> | 94% | 55,999 psi | 90% | 2172 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 47,805 psi | 77% | 2162 fps | 97.1% |
| Alliant Reloder-7 | <<locked>> | 86% | 53,403 psi | 86% | 2093 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 53,243 psi | 85% | 2100 fps | 100% |
| Baschieri & Pellagri 107ᴾ | <<locked>> | 100% | 53,882 psi | 86% | 2228 fps | 97.4% |
| Bofors RP3ᴾ | <<locked>> | 100% | 43,018 psi | 69% | 2113 fps | 97.7% |
| Hodgdon Benchmark | <<locked>> | 96% | 54,012 psi | 87% | 2149 fps | 99.6% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 55,361 psi | 89% | 2257 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 96% | 53,969 psi | 87% | 2283 fps | 98.1% |
| Hodgdon H322 | <<locked>> | 94% | 55,085 psi | 88% | 2205 fps | 100% |
| Hodgdon H335 | <<locked>> | 94% | 56,420 psi | 90% | 2231 fps | 100% |
| Hodgdon H4198 | <<locked>> | 86% | 53,577 psi | 86% | 2093 fps | 100% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 54,476 psi | 87% | 2228 fps | 99% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 49,298 psi | 79% | 2208 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,170 psi | 53% | 1250 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 53,113 psi | 85% | 2195 fps | 98.7% |
| IMR 3031ᴾ | <<locked>> | 100% | 52,272 psi | 84% | 2224 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 48,283 psi | 77% | 2119 fps | 97.1% |
| IMR 4198 | <<locked>> | 92% | 54,012 psi | 87% | 2106 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 53,693 psi | 86% | 2041 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 48,907 psi | 78% | 2188 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 98% | 54,143 psi | 87% | 2192 fps | 99.3% |
| Lovex D073.4 | <<locked>> | 88% | 54,882 psi | 88% | 2195 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 94% | 54,273 psi | 87% | 2188 fps | 99.7% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 51,735 psi | 83% | 2205 fps | 99.9% |
| Lovex S053 | <<locked>> | 84% | 55,535 psi | 89% | 2028 fps | 100% |
| Lovex S060ᴾ | <<locked>> | 100% | 55,898 psi | 90% | 2169 fps | 98.6% |
| Lovex S062ᴾ | <<locked>> | 100% | 47,079 psi | 75% | 2123 fps | 98.6% |
| Norma 200 | <<locked>> | 90% | 56,217 psi | 90% | 2152 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 52,968 psi | 85% | 2182 fps | 99.3% |
| Norma 202ᴾ | <<locked>> | 100% | 53,011 psi | 85% | 2192 fps | 100% |
| Norma 203Bᴾ | <<locked>> | 100% | 46,804 psi | 75% | 2152 fps | 97.5% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 47,616 psi | 76% | 2172 fps | 97.2% |
| Ramshot TAC | <<locked>> | 98% | 55,303 psi | 89% | 2198 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 98% | 53,185 psi | 85% | 2215 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 96% | 56,405 psi | 90% | 2198 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,257 psi | 53% | 1280 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 53,751 psi | 86% | 2073 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 94% | 54,418 psi | 87% | 2192 fps | 99.9% |
| ReloadSwiss RS 52ᴾ | <<locked>> | 100% | 50,270 psi | 81% | 2247 fps | 97.5% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 42,032 psi | 67% | 2142 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 98% | 54,201 psi | 87% | 2175 fps | 100% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 49,995 psi | 80% | 2136 fps | 98.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 40,059 psi | 64% | 2064 fps | 96.7% |
| Shooters World AR Plus | <<locked>> | 88% | 54,882 psi | 88% | 2195 fps | 99.9% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 51,735 psi | 83% | 2205 fps | 99.9% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 47,079 psi | 75% | 2123 fps | 98.6% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 55,376 psi | 89% | 2169 fps | 99.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 56,130 psi | 90% | 1906 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 53,882 psi | 86% | 2195 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 42,873 psi | 69% | 2110 fps | 96.2% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 53,925 psi | 86% | 2149 fps | 100% |
| SNPE Vectan SP 7ᴾ | <<locked>> | 100% | 56,202 psi | 90% | 2218 fps | 96.9% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 52,547 psi | 84% | 2198 fps | 98.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 52,997 psi | 85% | 2110 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 45,469 psi | 73% | 2037 fps | 100% |
| Somchem S321 | <<locked>> | 96% | 55,376 psi | 89% | 2228 fps | 99.6% |
| Somchem S335ᴾ | <<locked>> | 100% | 54,607 psi | 88% | 2146 fps | 100% |
| Somchem S341ᴾ | <<locked>> | 100% | 55,172 psi | 88% | 2215 fps | 98.5% |
| Somchem S355ᴾ | <<locked>> | 100% | 41,669 psi | 67% | 2070 fps | 96.9% |
| Vihtavuori N120 | <<locked>> | 88% | 55,172 psi | 88% | 2070 fps | 100% |
| Vihtavuori N130 | <<locked>> | 96% | 56,333 psi | 90% | 2129 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 55,622 psi | 89% | 2136 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 47,703 psi | 76% | 2123 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 50,154 psi | 80% | 2139 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 40,103 psi | 64% | 2024 fps | 97.7% |
| Vihtavuori N530 | <<locked>> | 98% | 55,027 psi | 88% | 2195 fps | 99.4% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 48,269 psi | 77% | 2136 fps | 99.8% |
| Winchester 748ᴾ | <<locked>> | 100% | 56,289 psi | 90% | 2267 fps | 99.9% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 51,793 psi | 83% | 2208 fps | 98.7% |
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% | 47,442 psi | 76% | 2005 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 31,937 psi | 51% | 1847 fps | 99.5% |
| Accurate 2200 | 58.7 gr | 80% | 41,785 psi | 67% | 2028 fps | 95.2% |
| Accurate 2230 | <<locked>> | 80% | 41,118 psi | 66% | 2031 fps | 95.6% |
| Accurate 2460 | <<locked>> | 80% | 34,055 psi | 55% | 1909 fps | 97.9% |
| Accurate 2495 | <<locked>> | 80% | 24,337 psi | 39% | 1759 fps | 98% |
| Accurate 2520 | <<locked>> | 80% | 29,588 psi | 47% | 1860 fps | 96.1% |
| Accurate 4064 | <<locked>> | 82% | 24,743 psi | 40% | 1778 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 40,741 psi | 65% | 1919 fps | 99.8% |
| Accurate LT-32 | <<locked>> | 80% | 41,075 psi | 66% | 1929 fps | 98.8% |
| ADI AR 2206H | <<locked>> | 88% | 37,594 psi | 60% | 1985 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 43,424 psi | 70% | 1978 fps | 100% |
| ADI AR 2208 | <<locked>> | 96% | 40,799 psi | 65% | 2018 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 38,348 psi | 61% | 1991 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 33,054 psi | 53% | 1883 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 80% | 29,240 psi | 47% | 1864 fps | 100% |
| Alliant Power Pro 1200-R | 57.8 gr | 80% | 35,056 psi | 56% | 1982 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 44,512 psi | 71% | 2159 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 34,214 psi | 55% | 1955 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 36,651 psi | 59% | 1929 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 39,755 psi | 64% | 2044 fps | 95.1% |
| Alliant Reloder-7 | <<locked>> | 80% | 44,570 psi | 71% | 1988 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 38,856 psi | 62% | 1919 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 44,483 psi | 71% | 2106 fps | 95.5% |
| Bofors RP3 | <<locked>> | 92% | 33,040 psi | 53% | 1952 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 33,562 psi | 54% | 1854 fps | 95.9% |
| Hodgdon BL-C2 | <<locked>> | 84% | 32,329 psi | 52% | 1926 fps | 95.7% |
| Hodgdon CFE223 | 69.3 gr | 88% | 41,379 psi | 66% | 2106 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 80% | 35,070 psi | 56% | 1936 fps | 99.1% |
| Hodgdon H335 | <<locked>> | 80% | 35,418 psi | 57% | 1949 fps | 98.4% |
| Hodgdon H4198 | <<locked>> | 80% | 44,860 psi | 72% | 1988 fps | 99.8% |
| Hodgdon H4895 | <<locked>> | 86% | 35,375 psi | 57% | 1955 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 35,897 psi | 58% | 2001 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,627 psi | 39% | 1115 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 36,811 psi | 59% | 1962 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 27,920 psi | 45% | 1847 fps | 98% |
| IMR 4064 | <<locked>> | 94% | 40,248 psi | 65% | 2005 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 38,145 psi | 61% | 1913 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 50,691 psi | 81% | 2008 fps | 100% |
| IMR 4895 | <<locked>> | 92% | 38,159 psi | 61% | 2031 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 82% | 33,054 psi | 53% | 1883 fps | 95.1% |
| Lovex D073.4 | <<locked>> | 80% | 41,597 psi | 67% | 2028 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 80% | 33,779 psi | 54% | 1906 fps | 96.5% |
| Lovex D073.6 | <<locked>> | 82% | 28,340 psi | 45% | 1847 fps | 95.6% |
| Lovex S053 | <<locked>> | 80% | 49,617 psi | 80% | 1969 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 39,233 psi | 63% | 1946 fps | 95.5% |
| Lovex S062 | <<locked>> | 88% | 32,648 psi | 52% | 1896 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 41,365 psi | 66% | 1982 fps | 100% |
| Norma 201 | <<locked>> | 84% | 32,561 psi | 52% | 1877 fps | 95.1% |
| Norma 202 | <<locked>> | 80% | 28,456 psi | 46% | 1818 fps | 96.4% |
| Norma 203B | <<locked>> | 94% | 38,899 psi | 62% | 2034 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 94% | 39,131 psi | 63% | 2044 fps | 95% |
| Ramshot TAC | <<locked>> | 96% | 51,982 psi | 83% | 2162 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 88% | 38,479 psi | 62% | 2011 fps | 95.2% |
| Ramshot X-Terminator | <<locked>> | 84% | 38,624 psi | 62% | 1959 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,685 psi | 40% | 1145 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 50,618 psi | 81% | 2041 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 34,940 psi | 56% | 1916 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 41,307 psi | 66% | 2116 fps | 95.4% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 32,590 psi | 52% | 1962 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 32,068 psi | 51% | 1850 fps | 97.3% |
| Rottweil R 902 | <<locked>> | 86% | 32,793 psi | 53% | 1877 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 96% | 35,128 psi | 56% | 1982 fps | 95.3% |
| Shooters World AR Plus | <<locked>> | 80% | 41,597 psi | 67% | 2028 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 28,340 psi | 45% | 1847 fps | 95.6% |
| Shooters World Precision | <<locked>> | 88% | 32,648 psi | 52% | 1896 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 37,057 psi | 59% | 1923 fps | 95.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 45,571 psi | 73% | 1801 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 38,899 psi | 62% | 1998 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 40,306 psi | 65% | 2067 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 37,304 psi | 60% | 1936 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 96% | 48,965 psi | 79% | 2133 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 38,319 psi | 61% | 1998 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 30,835 psi | 49% | 1791 fps | 97% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 24,990 psi | 40% | 1690 fps | 95.8% |
| Somchem S321 | <<locked>> | 80% | 32,634 psi | 52% | 1900 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 30,008 psi | 48% | 1795 fps | 97.7% |
| Somchem S341 | <<locked>> | 90% | 39,682 psi | 64% | 2011 fps | 95.4% |
| Somchem S355 | <<locked>> | 96% | 36,695 psi | 59% | 1991 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 43,468 psi | 70% | 1942 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 35,114 psi | 56% | 1864 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 30,603 psi | 49% | 1801 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 80% | 25,672 psi | 41% | 1768 fps | 98.2% |
| Vihtavuori N140 | <<locked>> | 80% | 26,992 psi | 43% | 1772 fps | 96.1% |
| Vihtavuori N150 | <<locked>> | 92% | 31,154 psi | 50% | 1870 fps | 95% |
| Vihtavuori N530 | <<locked>> | 82% | 32,837 psi | 53% | 1880 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 82% | 27,412 psi | 44% | 1795 fps | 95.6% |
| Winchester 748 | <<locked>> | 82% | 31,473 psi | 50% | 1903 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 90% | 37,478 psi | 60% | 2005 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 101 powders for .458 Win.Mag. loaded with the .458 | 465gr | A-Square MONO RN. Hodgdon CFE223 delivers the highest muzzle velocity at 2,283 fps; across all powders the maximum-charge window runs from 1,250 fps to 2,283 fps. Accurate 2495 gives the best case fill at 100 %, and 101 of the 101 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 48–90 %, leaving at least 10 % headroom. Accurate 2495, Accurate 2700, Accurate 4064 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 | 465gr | A-Square MONO RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Hodgdon Hybrid 100V, IMR 4166 Enduron burn incompletely and react more sensitively to barrel length and temperature. 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.