Load Specifications
Load data in caliber .458 Win.Mag. with .458 | 450gr | Swift A-Frame bullet and 74 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, Winchester StaBALL Match and Hodgdon H335.
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.
A valid access license is required to use the Personalized Load Calculator.
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>> | 86% | 53,258 psi | 85% | 2077 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 53,388 psi | 86% | 2149 fps | 100% |
| Accurate 2200 | <<locked>> | 92% | 56,391 psi | 90% | 2221 fps | 97.2% |
| Accurate 2230 | <<locked>> | 90% | 52,736 psi | 85% | 2185 fps | 97% |
| Accurate 2460 | <<locked>> | 98% | 55,796 psi | 89% | 2205 fps | 99.9% |
| Accurate 2495ᴾ | <<locked>> | 100% | 46,963 psi | 75% | 2159 fps | 100% |
| Accurate 2520ᴾ | <<locked>> | 100% | 49,864 psi | 80% | 2188 fps | 99.4% |
| Accurate 4064ᴾ | <<locked>> | 100% | 38,493 psi | 62% | 2051 fps | 98.8% |
| Accurate LT-30 | <<locked>> | 92% | 53,838 psi | 86% | 2087 fps | 100% |
| Accurate LT-32 | <<locked>> | 92% | 54,317 psi | 87% | 2100 fps | 99.7% |
| ADI AR 2206Hᴾ | <<locked>> | 100% | 49,182 psi | 79% | 2159 fps | 96.9% |
| ADI AR 2207 | <<locked>> | 90% | 53,795 psi | 86% | 2110 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 55,477 psi | 89% | 2215 fps | 100% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 52,359 psi | 84% | 2172 fps | 98.5% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 49,342 psi | 79% | 2172 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 96% | 52,881 psi | 85% | 2251 fps | 98.3% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 39,233 psi | 63% | 2044 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 96% | 54,230 psi | 87% | 2165 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 90% | 55,521 psi | 89% | 2123 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 55,332 psi | 89% | 2126 fps | 100% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 55,854 psi | 90% | 2169 fps | 99.2% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 49,603 psi | 80% | 2195 fps | 98.7% |
| Hodgdon CFE223ᴾ | <<locked>> | 100% | 55,811 psi | 89% | 2300 fps | 97.4% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 55,477 psi | 89% | 2215 fps | 100% |
| Hodgdon H335 | <<locked>> | 94% | 54,650 psi | 88% | 2218 fps | 99.9% |
| Hodgdon H4198 | <<locked>> | 92% | 55,492 psi | 89% | 2116 fps | 100% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 49,356 psi | 79% | 2169 fps | 97.5% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 41,611 psi | 67% | 2096 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,648 psi | 52% | 1240 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 44,208 psi | 71% | 2077 fps | 96.3% |
| IMR 3031ᴾ | <<locked>> | 100% | 42,337 psi | 68% | 2110 fps | 99.9% |
| IMR 4198 | <<locked>> | 96% | 55,579 psi | 89% | 2133 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 56,159 psi | 90% | 2073 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 43,976 psi | 71% | 2123 fps | 96% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 52,359 psi | 84% | 2172 fps | 98.5% |
| Lovex D073.4 | <<locked>> | 90% | 53,185 psi | 85% | 2178 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 98% | 55,912 psi | 90% | 2211 fps | 99.4% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 46,166 psi | 74% | 2142 fps | 99% |
| Lovex S053 | <<locked>> | 86% | 54,795 psi | 88% | 2031 fps | 100% |
| Lovex S060ᴾ | <<locked>> | 100% | 51,372 psi | 82% | 2113 fps | 97.1% |
| Lovex S062ᴾ | <<locked>> | 100% | 42,438 psi | 68% | 2064 fps | 96.9% |
| Norma 200 | <<locked>> | 92% | 54,534 psi | 87% | 2149 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 48,037 psi | 77% | 2123 fps | 98% |
| Norma 202ᴾ | <<locked>> | 100% | 47,688 psi | 76% | 2136 fps | 99.6% |
| Ramshot Wild Boarᴾ | <<locked>> | 100% | 51,561 psi | 83% | 2195 fps | 97.2% |
| Ramshot X-Terminator | <<locked>> | 98% | 55,172 psi | 88% | 2182 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,503 psi | 52% | 1270 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 56,173 psi | 90% | 2110 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 98% | 56,376 psi | 90% | 2215 fps | 99.7% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 38,232 psi | 61% | 2064 fps | 96.2% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 52,315 psi | 84% | 2159 fps | 99.8% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 45,237 psi | 73% | 2077 fps | 97.4% |
| Shooters World AR Plus | <<locked>> | 90% | 53,185 psi | 85% | 2178 fps | 99.5% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 46,166 psi | 74% | 2142 fps | 99% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 42,438 psi | 68% | 2064 fps | 96.9% |
| Shooters World Tactical Rifle | <<locked>> | 94% | 54,027 psi | 87% | 2152 fps | 98.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 55,463 psi | 89% | 1909 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 55,666 psi | 89% | 2221 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 55,361 psi | 89% | 2172 fps | 100% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 47,543 psi | 76% | 2136 fps | 96.4% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 51,793 psi | 83% | 2100 fps | 99.7% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 41,408 psi | 66% | 1988 fps | 99.3% |
| Somchem S321 | <<locked>> | 98% | 53,548 psi | 86% | 2211 fps | 98.9% |
| Somchem S335ᴾ | <<locked>> | 100% | 49,806 psi | 80% | 2100 fps | 99.9% |
| Somchem S341ᴾ | <<locked>> | 100% | 50,009 psi | 80% | 2152 fps | 96.7% |
| Vihtavuori N120 | <<locked>> | 90% | 53,795 psi | 86% | 2067 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 54,810 psi | 88% | 2123 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 50,821 psi | 81% | 2096 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 42,699 psi | 68% | 2073 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 45,223 psi | 73% | 2083 fps | 99.5% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 53,287 psi | 85% | 2175 fps | 98.6% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 43,526 psi | 70% | 2080 fps | 99% |
| Winchester 748ᴾ | <<locked>> | 100% | 55,782 psi | 89% | 2264 fps | 99.5% |
| Winchester StaBALL Match | <<locked>> | 96% | 53,156 psi | 85% | 2221 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% | 44,005 psi | 71% | 1969 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 28,964 psi | 46% | 1801 fps | 98.3% |
| Accurate 2200 | <<locked>> | 86% | 46,485 psi | 75% | 2096 fps | 95.3% |
| Accurate 2230 | <<locked>> | 86% | 45,847 psi | 74% | 2100 fps | 95.6% |
| Accurate 2460 | <<locked>> | 80% | 30,647 psi | 49% | 1850 fps | 95.9% |
| Accurate 2495 | <<locked>> | 80% | 24,120 psi | 39% | 1778 fps | 96.9% |
| Accurate 2520 | <<locked>> | 86% | 30,835 psi | 49% | 1903 fps | 95.5% |
| Accurate 4064 | <<locked>> | 88% | 26,281 psi | 42% | 1824 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 37,666 psi | 60% | 1877 fps | 98.9% |
| Accurate LT-32 | <<locked>> | 80% | 38,029 psi | 61% | 1880 fps | 97.4% |
| ADI AR 2206H | <<locked>> | 94% | 41,017 psi | 66% | 2044 fps | 95% |
| ADI AR 2207 | <<locked>> | 80% | 39,813 psi | 64% | 1946 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 34,940 psi | 56% | 1939 fps | 98.4% |
| ADI Benchmark 8208 | <<locked>> | 88% | 36,289 psi | 58% | 1946 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 26,484 psi | 42% | 1811 fps | 99.5% |
| Alliant Power Pro 1200-R | 58.2 gr | 86% | 38,450 psi | 62% | 2044 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 36,999 psi | 59% | 2008 fps | 95% |
| Alliant Reloder-10x | <<locked>> | 80% | 33,460 psi | 54% | 1886 fps | 99.8% |
| Alliant Reloder-7 | <<locked>> | 80% | 41,002 psi | 66% | 1952 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 35,665 psi | 57% | 1873 fps | 98.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 34,911 psi | 56% | 1880 fps | 95.3% |
| Hodgdon BL-C2 | <<locked>> | 90% | 35,418 psi | 57% | 1988 fps | 95.6% |
| Hodgdon CFE223 | <<locked>> | 94% | 45,730 psi | 73% | 2169 fps | 95.3% |
| Hodgdon H322 | <<locked>> | 80% | 29,805 psi | 48% | 1841 fps | 96.9% |
| Hodgdon H335 | 59.1 gr | 80% | 34,084 psi | 55% | 1932 fps | 97.2% |
| Hodgdon H4198 | <<locked>> | 80% | 39,088 psi | 63% | 1906 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 92% | 38,580 psi | 62% | 2011 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 39,117 psi | 63% | 2054 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,018 psi | 39% | 1106 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 41,713 psi | 67% | 2041 fps | 95.6% |
| IMR 3031 | <<locked>> | 82% | 24,860 psi | 40% | 1775 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 35,186 psi | 56% | 1873 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 47,065 psi | 75% | 1978 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 41,379 psi | 66% | 2083 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 88% | 36,289 psi | 58% | 1946 fps | 95% |
| Lovex D073.4 | <<locked>> | 80% | 37,681 psi | 60% | 1972 fps | 97.3% |
| Lovex D073.5 | <<locked>> | 82% | 32,518 psi | 52% | 1886 fps | 95% |
| Lovex D073.6 | <<locked>> | 88% | 30,835 psi | 49% | 1903 fps | 95.5% |
| Lovex S053 | <<locked>> | 80% | 46,180 psi | 74% | 1939 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 43,207 psi | 69% | 2005 fps | 95.4% |
| Lovex S062 | <<locked>> | 94% | 35,447 psi | 57% | 1952 fps | 95% |
| Norma 200 | <<locked>> | 80% | 37,652 psi | 60% | 1939 fps | 100% |
| Norma 201 | <<locked>> | 92% | 37,652 psi | 60% | 1972 fps | 95.7% |
| Norma 202 | <<locked>> | 84% | 29,124 psi | 47% | 1837 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 94% | 42,337 psi | 68% | 2070 fps | 95.1% |
| Ramshot X-Terminator | <<locked>> | 90% | 42,728 psi | 69% | 2024 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,062 psi | 39% | 1135 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 46,746 psi | 75% | 2008 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 31,908 psi | 51% | 1867 fps | 95.3% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 35,810 psi | 57% | 2018 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 29,211 psi | 47% | 1798 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 94% | 37,768 psi | 61% | 1969 fps | 95.6% |
| Shooters World AR Plus | <<locked>> | 80% | 37,681 psi | 60% | 1972 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 30,835 psi | 49% | 1903 fps | 95.5% |
| Shooters World Precision | <<locked>> | 94% | 35,447 psi | 57% | 1952 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 38,609 psi | 62% | 1949 fps | 95.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 42,757 psi | 69% | 1781 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 35,244 psi | 57% | 1942 fps | 97.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 33,968 psi | 54% | 1890 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 42,148 psi | 68% | 2060 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 30,037 psi | 48% | 1778 fps | 95.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 25,730 psi | 41% | 1706 fps | 95% |
| Somchem S321 | <<locked>> | 86% | 35,969 psi | 58% | 1965 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 27,354 psi | 44% | 1745 fps | 95.7% |
| Somchem S341 | <<locked>> | 96% | 43,845 psi | 70% | 2070 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 39,987 psi | 64% | 1913 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 32,155 psi | 52% | 1824 fps | 99.4% |
| Vihtavuori N133 | <<locked>> | 80% | 27,963 psi | 45% | 1755 fps | 97.7% |
| Vihtavuori N135 | <<locked>> | 80% | 23,250 psi | 37% | 1716 fps | 96.2% |
| Vihtavuori N140 | <<locked>> | 84% | 27,760 psi | 45% | 1791 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 88% | 36,143 psi | 58% | 1939 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 88% | 29,965 psi | 48% | 1854 fps | 95.6% |
| Winchester 748 | <<locked>> | 86% | 35,085 psi | 56% | 1972 fps | 95.7% |
| Winchester StaBALL Match | 67.9 gr | 88% | 40,030 psi | 64% | 2044 fps | 95.2% |
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 92 powders for .458 Win.Mag. loaded with the .458 | 450gr | Swift A-Frame. Hodgdon CFE223 delivers the highest muzzle velocity at 2,300 fps; across all powders the maximum-charge window runs from 1,240 fps to 2,300 fps. Accurate 2015 gives the best case fill at 100 %, and 92 of the 92 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. 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, Winchester StaBALL Match, Hodgdon H335 rank at the top here: for .458 Win.Mag. with the .458 | 450gr | Swift A-Frame they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2208, Alliant Power Pro 2000-MR, Alliant Reloder-15 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.