Load Specifications
Bullet Manufacturer:CamPro
Bullet Weight:550 gr
Bullet Diameter:0.458"
Bullet Length:<<locked>>
Caliber:.458 Lott load data
Case Length (l3):2.8"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:110 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:6.0
Load data in caliber .458 Lott with .458 | 550gr | CamPro FCP Spitzer bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 and Hodgdon CFE223.
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 2015 | <<locked>> | 92% | 55,361 psi | 89% | 1982 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 56,043 psi | 90% | 2057 fps | 99.6% |
| Accurate 2230 | <<locked>> | 82% | 52,997 psi | 85% | 2028 fps | 99.5% |
| Accurate 2460 | <<locked>> | 88% | 53,563 psi | 86% | 2005 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 54,795 psi | 88% | 2024 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 54,781 psi | 88% | 2051 fps | 100% |
| Accurate 2700 | <<locked>> | 96% | 53,476 psi | 86% | 1988 fps | 95.7% |
| Accurate 4064ᴾ | <<locked>> | 100% | 54,346 psi | 87% | 2057 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 39,929 psi | 64% | 1952 fps | 97.2% |
| Accurate LT-30 | <<locked>> | 86% | 56,101 psi | 90% | 1942 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 53,388 psi | 86% | 1926 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 53,940 psi | 86% | 2054 fps | 99.8% |
| ADI AR 2207 | <<locked>> | 82% | 54,273 psi | 87% | 1919 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 54,723 psi | 88% | 2047 fps | 99.5% |
| ADI AR 2219 | <<locked>> | 86% | 56,173 psi | 90% | 2034 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 53,708 psi | 86% | 2021 fps | 100% |
| Alliant AR-Comp | <<locked>> | 94% | 56,289 psi | 90% | 2034 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 55,158 psi | 88% | 2096 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 53,156 psi | 85% | 2136 fps | 99.5% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 53,505 psi | 86% | 2064 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 88% | 55,376 psi | 89% | 1982 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 54,520 psi | 87% | 2080 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 41,553 psi | 67% | 1962 fps | 97.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 47,340 psi | 76% | 2070 fps | 99.6% |
| Alliant Reloder-7 | <<locked>> | 82% | 55,187 psi | 88% | 1932 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 54,868 psi | 88% | 1949 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 53,432 psi | 86% | 2067 fps | 99.3% |
| Bofors RP3ᴾ | <<locked>> | 100% | 53,519 psi | 86% | 2073 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 92% | 56,115 psi | 90% | 2008 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 94% | 55,245 psi | 89% | 2083 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 53,505 psi | 86% | 2113 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 88% | 54,520 psi | 87% | 2021 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 55,521 psi | 89% | 2044 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 55,767 psi | 89% | 2087 fps | 99.1% |
| Hodgdon H4198 | <<locked>> | 82% | 54,766 psi | 88% | 1939 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 54,331 psi | 87% | 2060 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 37,768 psi | 61% | 1880 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 55,999 psi | 90% | 2119 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,389 psi | 55% | 1168 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 55,999 psi | 90% | 2064 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 53,345 psi | 86% | 2047 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 54,418 psi | 87% | 2034 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 96% | 55,608 psi | 89% | 2021 fps | 97.1% |
| IMR 4198 | <<locked>> | 88% | 56,275 psi | 90% | 1952 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 50,836 psi | 82% | 1998 fps | 96.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 38,812 psi | 62% | 1916 fps | 96.8% |
| IMR 4895 | <<locked>> | 98% | 55,883 psi | 90% | 2103 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 92% | 53,708 psi | 86% | 2021 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 53,867 psi | 86% | 2011 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 53,708 psi | 86% | 2014 fps | 100% |
| Lovex D073.6 | <<locked>> | 96% | 56,086 psi | 90% | 2070 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 54,708 psi | 88% | 2001 fps | 99.8% |
| Lovex S062 | <<locked>> | 98% | 53,388 psi | 86% | 2031 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 46,311 psi | 74% | 1955 fps | 96.9% |
| Norma 200 | <<locked>> | 84% | 55,521 psi | 89% | 1965 fps | 100% |
| Norma 201 | <<locked>> | 96% | 56,159 psi | 90% | 2047 fps | 100% |
| Norma 202 | <<locked>> | 96% | 56,405 psi | 90% | 2051 fps | 100% |
| Norma 203B | <<locked>> | 98% | 53,592 psi | 86% | 2070 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 41,031 psi | 66% | 1952 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 98% | 53,925 psi | 86% | 2093 fps | 99.7% |
| Ramshot TAC | <<locked>> | 92% | 54,099 psi | 87% | 2037 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 92% | 53,011 psi | 85% | 2051 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 90% | 55,172 psi | 88% | 2028 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,650 psi | 56% | 1198 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 53,461 psi | 86% | 2011 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 53,055 psi | 85% | 2034 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 54,201 psi | 87% | 2129 fps | 99.7% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 50,633 psi | 81% | 2116 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 40,350 psi | 65% | 1969 fps | 96.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 42,105 psi | 68% | 1982 fps | 96% |
| Rottweil R 901 | <<locked>> | 92% | 54,070 psi | 87% | 1998 fps | 100% |
| Rottweil R 902 | <<locked>> | 98% | 56,304 psi | 90% | 2041 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 49,835 psi | 80% | 2028 fps | 99.8% |
| Shooters World AR Plus | <<locked>> | 82% | 53,867 psi | 86% | 2011 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 46,311 psi | 74% | 1955 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 96% | 56,086 psi | 90% | 2070 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 53,388 psi | 86% | 2031 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 53,795 psi | 86% | 1991 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 54,143 psi | 87% | 1726 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 56,420 psi | 90% | 2047 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 51,938 psi | 83% | 2077 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 53,316 psi | 85% | 1965 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 55,550 psi | 89% | 2054 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 55,738 psi | 89% | 2070 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 55,448 psi | 89% | 1969 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 54,520 psi | 87% | 1969 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 54,781 psi | 88% | 2054 fps | 100% |
| Somchem S335 | <<locked>> | 94% | 54,099 psi | 87% | 1972 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 54,781 psi | 88% | 2051 fps | 99.8% |
| Somchem S355ᴾ | <<locked>> | 100% | 50,879 psi | 82% | 2028 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,477 psi | 58% | 1916 fps | 99% |
| Vihtavuori N120 | <<locked>> | 82% | 54,172 psi | 87% | 1880 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 55,477 psi | 89% | 1946 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 55,143 psi | 88% | 1959 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 55,158 psi | 88% | 2014 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 53,490 psi | 86% | 2001 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 49,037 psi | 79% | 1982 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 43,337 psi | 69% | 1952 fps | 97.5% |
| Vihtavuori N530 | <<locked>> | 92% | 54,215 psi | 87% | 2021 fps | 100% |
| Vihtavuori N540 | <<locked>> | 98% | 54,708 psi | 88% | 2037 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 42,192 psi | 68% | 1959 fps | 97.2% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 44,628 psi | 72% | 1946 fps | 99.2% |
| Winchester 748 | <<locked>> | 94% | 56,318 psi | 90% | 2093 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 96% | 55,114 psi | 88% | 2077 fps | 100% |
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 2015 | <<locked>> | 80% | 38,392 psi | 62% | 1791 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 49,284 psi | 79% | 1978 fps | 99% |
| Accurate 2230 | <<locked>> | 80% | 49,443 psi | 79% | 1988 fps | 99.2% |
| Accurate 2460 | <<locked>> | 80% | 41,350 psi | 66% | 1864 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 30,792 psi | 49% | 1732 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 36,579 psi | 59% | 1831 fps | 99.6% |
| Accurate 2700 | <<locked>> | 94% | 50,096 psi | 80% | 1949 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 29,153 psi | 47% | 1719 fps | 99.1% |
| Accurate 4350 | <<locked>> | 96% | 34,824 psi | 56% | 1873 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 46,949 psi | 75% | 1847 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,340 psi | 76% | 1860 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 35,172 psi | 56% | 1798 fps | 97% |
| ADI AR 2207 | <<locked>> | 80% | 51,097 psi | 82% | 1886 fps | 100% |
| ADI AR 2208 | <<locked>> | 82% | 32,010 psi | 51% | 1732 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 45,919 psi | 74% | 1926 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,101 psi | 59% | 1808 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 80% | 35,549 psi | 57% | 1808 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 42,627 psi | 68% | 1942 fps | 99.2% |
| Alliant Power Pro 2000-MR | 65.3 gr | 82% | 33,736 psi | 54% | 1841 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 28,761 psi | 46% | 1706 fps | 96% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,656 psi | 70% | 1857 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 31,256 psi | 50% | 1749 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 94% | 34,853 psi | 56% | 1847 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 86% | 30,313 psi | 49% | 1788 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 51,837 psi | 83% | 1900 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 45,353 psi | 73% | 1847 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 33,866 psi | 54% | 1795 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 27,804 psi | 45% | 1703 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,378 psi | 63% | 1808 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,737 psi | 56% | 1821 fps | 98.7% |
| Hodgdon CFE223 | 65.2 gr | 80% | 38,261 psi | 61% | 1909 fps | 97.4% |
| Hodgdon H322 | <<locked>> | 80% | 42,105 psi | 68% | 1880 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 42,641 psi | 68% | 1900 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 35,433 psi | 57% | 1821 fps | 95.1% |
| Hodgdon H4198 | <<locked>> | 80% | 51,648 psi | 83% | 1909 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 35,375 psi | 57% | 1808 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 29,747 psi | 48% | 1736 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,386 psi | 50% | 1778 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,425 psi | 41% | 1040 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,142 psi | 55% | 1775 fps | 97.2% |
| IMR 3031 | <<locked>> | 80% | 34,055 psi | 55% | 1811 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 31,415 psi | 50% | 1716 fps | 95.2% |
| IMR 4166 Enduron | <<locked>> | 90% | 46,340 psi | 74% | 1913 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 44,657 psi | 72% | 1831 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 48,037 psi | 77% | 1962 fps | 95.6% |
| IMR 4831 | <<locked>> | 96% | 34,360 psi | 55% | 1844 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 31,908 psi | 51% | 1772 fps | 96.2% |
| IMR 8208 XBR | <<locked>> | 80% | 37,101 psi | 59% | 1808 fps | 98.6% |
| Lovex D073.4 | <<locked>> | 80% | 50,270 psi | 81% | 1972 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 40,959 psi | 66% | 1867 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 33,054 psi | 53% | 1785 fps | 99.1% |
| Lovex S060 | <<locked>> | 80% | 36,361 psi | 58% | 1762 fps | 97.3% |
| Lovex S062 | <<locked>> | 80% | 31,082 psi | 50% | 1722 fps | 97.2% |
| Lovex S065 | <<locked>> | 94% | 38,682 psi | 62% | 1847 fps | 95% |
| Norma 200 | <<locked>> | 80% | 49,197 psi | 79% | 1900 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,548 psi | 55% | 1768 fps | 98.1% |
| Norma 202 | <<locked>> | 80% | 34,374 psi | 55% | 1778 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 30,632 psi | 49% | 1742 fps | 95.6% |
| Norma URP | <<locked>> | 94% | 34,200 psi | 55% | 1841 fps | 95% |
| Ramshot Big Game | <<locked>> | 82% | 32,184 psi | 52% | 1785 fps | 95.7% |
| Ramshot TAC | <<locked>> | 82% | 39,363 psi | 63% | 1844 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 35,781 psi | 57% | 1821 fps | 97.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,147 psi | 64% | 1841 fps | 98% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,614 psi | 41% | 1066 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,698 psi | 67% | 1870 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 43,816 psi | 70% | 1919 fps | 95.5% |
| ReloadSwiss RS 52 | 61.7 gr | 80% | 31,908 psi | 51% | 1808 fps | 95.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 26,774 psi | 43% | 1713 fps | 96.3% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 35,505 psi | 57% | 1890 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 39,407 psi | 63% | 1936 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 38,203 psi | 61% | 1804 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 32,793 psi | 53% | 1736 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 27,992 psi | 45% | 1703 fps | 95.5% |
| Shooters World AR Plus | <<locked>> | 80% | 50,270 psi | 81% | 1972 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 94% | 38,682 psi | 62% | 1847 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,054 psi | 53% | 1785 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 31,082 psi | 50% | 1722 fps | 97.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,005 psi | 71% | 1880 fps | 99.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 51,474 psi | 83% | 1699 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 46,398 psi | 74% | 1939 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 31,415 psi | 50% | 1775 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,266 psi | 71% | 1867 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 37,014 psi | 59% | 1821 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 33,620 psi | 54% | 1775 fps | 96.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,289 psi | 58% | 1742 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,573 psi | 47% | 1650 fps | 99.4% |
| Somchem S321 | <<locked>> | 80% | 39,320 psi | 63% | 1864 fps | 99.2% |
| Somchem S335 | <<locked>> | 80% | 35,723 psi | 57% | 1749 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 34,316 psi | 55% | 1785 fps | 96.6% |
| Somchem S355 | <<locked>> | 82% | 29,269 psi | 47% | 1709 fps | 95.6% |
| Somchem S365 | <<locked>> | 90% | 26,992 psi | 43% | 1729 fps | 95.6% |
| Vihtavuori N120 | <<locked>> | 80% | 51,053 psi | 82% | 1850 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 41,234 psi | 66% | 1795 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,303 psi | 58% | 1745 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 31,415 psi | 50% | 1729 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 32,430 psi | 52% | 1736 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 26,034 psi | 42% | 1634 fps | 95.8% |
| Vihtavuori N160 | <<locked>> | 94% | 35,926 psi | 58% | 1841 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 36,811 psi | 59% | 1804 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 80% | 31,111 psi | 50% | 1729 fps | 99% |
| Vihtavuori N550 | <<locked>> | 94% | 34,969 psi | 56% | 1847 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 30,560 psi | 49% | 1722 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 35,563 psi | 57% | 1834 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 80% | 32,619 psi | 52% | 1775 fps | 96.9% |
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 104 powders for .458 Lott loaded with the .458 | 550gr | CamPro FCP Spitzer. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,136 fps; across all powders the maximum-charge window runs from 1,168 fps to 2,136 fps. Accurate 4064 gives the best case fill at 100 %, and 104 of the 104 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 550.0 gr projectile in 0.458" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 4064, Accurate 4350, 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 52, Hodgdon CFE223 rank at the top here: for .458 Lott with the .458 | 550gr | CamPro FCP Spitzer they combine a high case fill with complete burn and sit in the upper velocity band. 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.