Load Specifications
Load data in caliber .458 Lott with .458 | 500gr | Speer TBSS bullet and 92 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 2000-MR and ReloadSwiss RS 52.
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>> | 82% | 56,028 psi | 90% | 2044 fps | 100% |
| Accurate 2015 | <<locked>> | 94% | 55,564 psi | 89% | 2103 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 53,403 psi | 86% | 2142 fps | 98.8% |
| Accurate 2230 | <<locked>> | 84% | 53,780 psi | 86% | 2152 fps | 99.1% |
| Accurate 2460 | <<locked>> | 90% | 54,070 psi | 87% | 2129 fps | 100% |
| Accurate 2495ᴾ | <<locked>> | 100% | 54,839 psi | 88% | 2149 fps | 100% |
| Accurate 2520 | <<locked>> | 94% | 55,071 psi | 88% | 2172 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 50,836 psi | 82% | 2142 fps | 100% |
| Accurate LT-30 | <<locked>> | 86% | 53,737 psi | 86% | 2034 fps | 100% |
| Accurate LT-32 | <<locked>> | 86% | 54,172 psi | 87% | 2051 fps | 100% |
| ADI AR 2206H | <<locked>> | 96% | 54,346 psi | 87% | 2175 fps | 99.5% |
| ADI AR 2207 | <<locked>> | 84% | 54,897 psi | 88% | 2047 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 51,938 psi | 83% | 2129 fps | 98.7% |
| ADI AR 2219 | <<locked>> | 86% | 53,156 psi | 85% | 2126 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 94% | 54,128 psi | 87% | 2142 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 96% | 56,173 psi | 90% | 2159 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 90% | 55,376 psi | 89% | 2221 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 53,911 psi | 86% | 2257 fps | 98.9% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 50,343 psi | 81% | 2146 fps | 99.6% |
| Alliant Reloder-10x | <<locked>> | 90% | 55,941 psi | 90% | 2110 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 54,882 psi | 88% | 2201 fps | 99.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 44,599 psi | 72% | 2139 fps | 98.6% |
| Alliant Reloder-7 | <<locked>> | 84% | 55,941 psi | 90% | 2060 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 55,622 psi | 89% | 2070 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 96% | 53,824 psi | 86% | 2185 fps | 98.7% |
| Bofors RP3ᴾ | <<locked>> | 100% | 50,125 psi | 80% | 2156 fps | 99.6% |
| Hodgdon Benchmark | <<locked>> | 92% | 53,403 psi | 86% | 2096 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 96% | 55,550 psi | 89% | 2208 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 92% | 53,969 psi | 87% | 2238 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 90% | 54,940 psi | 88% | 2146 fps | 100% |
| Hodgdon H335 | <<locked>> | 90% | 55,970 psi | 90% | 2169 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 52,243 psi | 84% | 2162 fps | 97.9% |
| Hodgdon H4198 | <<locked>> | 84% | 55,738 psi | 89% | 2067 fps | 100% |
| Hodgdon H4895 | <<locked>> | 96% | 54,810 psi | 88% | 2185 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 35,650 psi | 57% | 1942 fps | 96.2% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 56,217 psi | 90% | 2244 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,997 psi | 55% | 1237 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 53,214 psi | 85% | 2149 fps | 99.6% |
| IMR 3031 | <<locked>> | 96% | 53,258 psi | 85% | 2172 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 54,694 psi | 88% | 2152 fps | 99.2% |
| IMR 4198 | <<locked>> | 88% | 53,679 psi | 86% | 2047 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 56,188 psi | 90% | 2224 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 94% | 54,128 psi | 87% | 2142 fps | 99.9% |
| Lovex D073.4 | <<locked>> | 84% | 54,433 psi | 87% | 2136 fps | 100% |
| Lovex D073.5 | <<locked>> | 90% | 54,041 psi | 87% | 2136 fps | 100% |
| Lovex D073.6 | <<locked>> | 98% | 56,202 psi | 90% | 2195 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 55,390 psi | 89% | 2119 fps | 99.5% |
| Lovex S062ᴾ | <<locked>> | 100% | 53,693 psi | 86% | 2152 fps | 99.9% |
| Norma 200 | <<locked>> | 86% | 56,101 psi | 90% | 2090 fps | 100% |
| Norma 201 | <<locked>> | 98% | 56,420 psi | 90% | 2169 fps | 100% |
| Norma 202 | <<locked>> | 96% | 53,301 psi | 85% | 2139 fps | 100% |
| Norma 203Bᴾ | <<locked>> | 100% | 53,853 psi | 86% | 2192 fps | 99.5% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 54,331 psi | 87% | 2211 fps | 99.4% |
| Ramshot TAC | <<locked>> | 94% | 54,824 psi | 88% | 2156 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 94% | 53,330 psi | 86% | 2172 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 92% | 55,898 psi | 90% | 2149 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,185 psi | 55% | 1266 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 54,027 psi | 87% | 2136 fps | 100% |
| ReloadSwiss RS 50ᴾ | <<locked>> | 100% | 53,505 psi | 86% | 2149 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 98% | 54,288 psi | 87% | 2251 fps | 99.2% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 47,659 psi | 76% | 2195 fps | 100% |
| Rottweil R 901 | <<locked>> | 94% | 54,317 psi | 87% | 2123 fps | 100% |
| Rottweil R 902 | <<locked>> | 98% | 53,258 psi | 85% | 2126 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 46,572 psi | 75% | 2103 fps | 99.1% |
| Shooters World AR Plus | <<locked>> | 84% | 54,433 psi | 87% | 2136 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 98% | 56,202 psi | 90% | 2195 fps | 100% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 53,693 psi | 86% | 2152 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 54,592 psi | 88% | 2113 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 54,926 psi | 88% | 1841 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 53,301 psi | 85% | 2136 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 48,907 psi | 78% | 2156 fps | 98.8% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 53,766 psi | 86% | 2090 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 96% | 56,101 psi | 90% | 2175 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 98% | 56,072 psi | 90% | 2192 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 56,072 psi | 90% | 2093 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 51,590 psi | 83% | 2054 fps | 100% |
| Somchem S321 | <<locked>> | 92% | 55,259 psi | 89% | 2175 fps | 100% |
| Somchem S335 | <<locked>> | 96% | 54,563 psi | 87% | 2093 fps | 100% |
| Somchem S341 | <<locked>> | 96% | 55,216 psi | 89% | 2169 fps | 99.4% |
| Somchem S355ᴾ | <<locked>> | 100% | 47,848 psi | 77% | 2106 fps | 99.1% |
| Somchem S365ᴾ | <<locked>> | 100% | 34,360 psi | 55% | 1978 fps | 97.5% |
| Vihtavuori N120 | <<locked>> | 84% | 54,824 psi | 88% | 2005 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 56,057 psi | 90% | 2070 fps | 100% |
| Vihtavuori N133 | <<locked>> | 96% | 55,608 psi | 89% | 2080 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 55,071 psi | 88% | 2139 fps | 100% |
| Vihtavuori N140 | <<locked>> | 98% | 53,592 psi | 86% | 2123 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 46,021 psi | 74% | 2057 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 94% | 54,563 psi | 87% | 2142 fps | 99.9% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 54,998 psi | 88% | 2159 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 42,250 psi | 68% | 2014 fps | 97.9% |
| Winchester 748 | <<locked>> | 94% | 52,939 psi | 85% | 2178 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 98% | 55,405 psi | 89% | 2198 fps | 99.8% |
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% | 52,576 psi | 84% | 2011 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 36,230 psi | 58% | 1867 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 46,760 psi | 75% | 2057 fps | 97.9% |
| Accurate 2230 | <<locked>> | 80% | 46,789 psi | 75% | 2067 fps | 98.2% |
| Accurate 2460 | <<locked>> | 80% | 38,972 psi | 62% | 1939 fps | 99.6% |
| Accurate 2495 | <<locked>> | 80% | 28,747 psi | 46% | 1798 fps | 99.8% |
| Accurate 2520 | <<locked>> | 80% | 34,258 psi | 55% | 1900 fps | 98.7% |
| Accurate 4064 | <<locked>> | 80% | 27,238 psi | 44% | 1781 fps | 97.9% |
| Accurate LT-30 | <<locked>> | 80% | 44,817 psi | 72% | 1929 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 45,194 psi | 72% | 1942 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 33,214 psi | 53% | 1864 fps | 95.3% |
| ADI AR 2207 | <<locked>> | 80% | 48,631 psi | 78% | 1982 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 36,332 psi | 58% | 1906 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 43,497 psi | 70% | 2011 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 35,172 psi | 56% | 1880 fps | 97.3% |
| Alliant AR-Comp | <<locked>> | 80% | 33,402 psi | 54% | 1886 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 40,103 psi | 64% | 2018 fps | 98.1% |
| Alliant Power Pro 2000-MR | 72.1 gr | 88% | 38,783 psi | 62% | 2034 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 30,618 psi | 49% | 1844 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 41,365 psi | 66% | 1942 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 35,476 psi | 57% | 1929 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 92% | 34,606 psi | 55% | 1969 fps | 95.8% |
| Alliant Reloder-7 | <<locked>> | 80% | 49,588 psi | 80% | 1995 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 43,323 psi | 69% | 1932 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 36,506 psi | 59% | 1939 fps | 95% |
| Bofors RP3 | <<locked>> | 84% | 29,675 psi | 48% | 1841 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 37,521 psi | 60% | 1880 fps | 98.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 32,547 psi | 52% | 1886 fps | 97.3% |
| Hodgdon CFE223 | 67 gr | 80% | 35,984 psi | 58% | 1972 fps | 95.5% |
| Hodgdon H322 | <<locked>> | 80% | 39,755 psi | 64% | 1962 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 40,234 psi | 65% | 1978 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 92% | 40,422 psi | 65% | 2001 fps | 95.4% |
| Hodgdon H4198 | <<locked>> | 80% | 49,342 psi | 79% | 1995 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 33,373 psi | 54% | 1873 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 33,591 psi | 54% | 1903 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 31,575 psi | 51% | 1880 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,179 psi | 40% | 1099 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 32,329 psi | 52% | 1841 fps | 95.5% |
| IMR 3031 | <<locked>> | 80% | 31,879 psi | 51% | 1880 fps | 99.8% |
| IMR 4064 | <<locked>> | 86% | 35,824 psi | 57% | 1893 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 42,453 psi | 68% | 1916 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 31,908 psi | 51% | 1870 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 35,172 psi | 56% | 1880 fps | 97.3% |
| Lovex D073.4 | <<locked>> | 80% | 47,427 psi | 76% | 2054 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 38,667 psi | 62% | 1939 fps | 98.9% |
| Lovex D073.6 | <<locked>> | 80% | 30,937 psi | 50% | 1850 fps | 97.9% |
| Lovex S060 | <<locked>> | 80% | 34,505 psi | 55% | 1827 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 29,196 psi | 47% | 1785 fps | 95.5% |
| Norma 200 | <<locked>> | 80% | 46,746 psi | 75% | 1991 fps | 100% |
| Norma 201 | <<locked>> | 80% | 32,677 psi | 52% | 1837 fps | 96.7% |
| Norma 202 | <<locked>> | 80% | 32,445 psi | 52% | 1850 fps | 98.8% |
| Norma 203B | <<locked>> | 84% | 32,706 psi | 52% | 1880 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 86% | 34,490 psi | 55% | 1926 fps | 95.3% |
| Ramshot TAC | <<locked>> | 86% | 42,482 psi | 68% | 1995 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 33,721 psi | 54% | 1886 fps | 95.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 38,101 psi | 61% | 1913 fps | 96.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,295 psi | 41% | 1129 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 39,421 psi | 63% | 1946 fps | 99.3% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 47,079 psi | 75% | 2067 fps | 95.1% |
| ReloadSwiss RS 52 | 66.7 gr | 84% | 34,287 psi | 55% | 1955 fps | 95% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 28,689 psi | 46% | 1847 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 36,158 psi | 58% | 1877 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 80% | 31,082 psi | 50% | 1801 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 86% | 29,718 psi | 48% | 1834 fps | 95% |
| Shooters World AR Plus | <<locked>> | 80% | 47,427 psi | 76% | 2054 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 30,937 psi | 50% | 1850 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 29,196 psi | 47% | 1785 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 41,669 psi | 67% | 1952 fps | 98.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 49,603 psi | 80% | 1791 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 43,918 psi | 70% | 2021 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 33,692 psi | 54% | 1916 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 42,076 psi | 67% | 1952 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 39,914 psi | 64% | 1965 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 33,895 psi | 54% | 1880 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 34,577 psi | 55% | 1818 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,036 psi | 45% | 1719 fps | 98.5% |
| Somchem S321 | <<locked>> | 80% | 37,202 psi | 60% | 1936 fps | 98.1% |
| Somchem S335 | <<locked>> | 80% | 33,924 psi | 54% | 1821 fps | 99.5% |
| Somchem S341 | <<locked>> | 82% | 34,621 psi | 56% | 1886 fps | 95.6% |
| Somchem S355 | <<locked>> | 86% | 31,198 psi | 50% | 1847 fps | 95.2% |
| Somchem S365 | <<locked>> | 94% | 28,703 psi | 46% | 1857 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 48,631 psi | 78% | 1942 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 39,320 psi | 63% | 1877 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 34,505 psi | 55% | 1821 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 29,530 psi | 47% | 1801 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 80% | 30,574 psi | 49% | 1801 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 84% | 27,833 psi | 45% | 1765 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 34,882 psi | 56% | 1873 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 80% | 29,269 psi | 47% | 1791 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 32,808 psi | 53% | 1854 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 33,533 psi | 54% | 1903 fps | 97.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 30,763 psi | 49% | 1837 fps | 95.1% |
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 Lott loaded with the .458 | 500gr | Speer TBSS. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,257 fps; across all powders the maximum-charge window runs from 1,237 fps to 2,257 fps. Accurate 2495 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 55–90 %, leaving at least 10 % headroom. The 500.0 gr projectile in 0.458" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, ADI AR 2208 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 2000-MR, ReloadSwiss RS 52 rank at the top here: for .458 Lott with the .458 | 500gr | Speer TBSS 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.