Load Specifications
Load data in caliber .45 Win. Mag. with .451 | 300gr | Speer Spitzer Soft Point bullet and 63 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N105, Vihtavuori 3N38 and ADI AP 100.
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 ≥ 60% and propellant combustion ≥ 80%. 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: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 72% | 36,027 psi | 90% | 1102 fps | 100% |
| Accurate No. 7*² | <<locked>> | 72% | 33,852 psi | 85% | 1227 fps | 94.6% |
| Accurate No. 9* | <<locked>> | 80% | 33,301 psi | 83% | 1211 fps | 88.8% |
| Accurate Solo 1000² | <<locked>> | 72% | 34,983 psi | 88% | 1007 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 76% | 34,142 psi | 86% | 1047 fps | 100% |
| Accurate TCM* | <<locked>> | 80% | 33,388 psi | 84% | 1207 fps | 90.3% |
| ADI AP 100 | <<locked>> | 92% | 34,214 psi | 86% | 1175 fps | 99.7% |
| ADI AP 70N² | <<locked>> | 64% | 35,694 psi | 89% | 1076 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 35,940 psi | 90% | 928 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 35,027 psi | 88% | 948 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 34,156 psi | 86% | 971 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 33,692 psi | 84% | 1007 fps | 100% |
| Alliant BE-86² | <<locked>> | 76% | 35,578 psi | 89% | 1053 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 92% | 33,011 psi | 83% | 1204 fps | 93.1% |
| Alliant BULLSEYE² | <<locked>> | 68% | 35,824 psi | 90% | 1125 fps | 100% |
| Alliant Green Dot² | <<locked>> | 72% | 33,895 psi | 85% | 1010 fps | 100% |
| Alliant Herco | <<locked>> | 92% | 35,766 psi | 90% | 1132 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 76% | 34,360 psi | 86% | 1214 fps | 99.6% |
| Alliant RED DOT² | <<locked>> | 76% | 35,607 psi | 89% | 1004 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 35,969 psi | 90% | 1132 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 76% | 34,621 psi | 87% | 1119 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 72% | 33,895 psi | 85% | 1001 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 92% | 35,331 psi | 89% | 1027 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 68% | 33,953 psi | 85% | 1024 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 72% | 34,519 psi | 87% | 1063 fps | 100% |
| Hodgdon Clays² | <<locked>> | 68% | 33,562 psi | 84% | 915 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 17,985 psi | 45% | 784 fps | 100% |
| Hodgdon Universal² | <<locked>> | 68% | 33,069 psi | 83% | 1050 fps | 100% |
| Lovex D037.1*² | <<locked>> | 72% | 33,852 psi | 85% | 1227 fps | 94.6% |
| Lovex D037.2* | <<locked>> | 80% | 34,316 psi | 86% | 1227 fps | 89.4% |
| Lovex S020² | <<locked>> | 68% | 33,257 psi | 83% | 1070 fps | 100% |
| Maxam CSB 1 | <<locked>> | 80% | 34,795 psi | 87% | 1050 fps | 100% |
| Maxam CSB 2² | <<locked>> | 76% | 35,128 psi | 88% | 1053 fps | 100% |
| Maxam CSB 3² | <<locked>> | 76% | 35,955 psi | 90% | 1040 fps | 100% |
| Maxam CSB 4² | <<locked>> | 72% | 34,461 psi | 86% | 1007 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 34,330 psi | 86% | 965 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 64% | 35,737 psi | 90% | 1132 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 64% | 33,504 psi | 84% | 1024 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 16,462 psi | 41% | 791 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 76% | 33,286 psi | 83% | 1099 fps | 100% |
| ReloadSwiss RS 24 | <<locked>> | 80% | 35,723 psi | 90% | 1234 fps | 97% |
| Rottweil P 806 | <<locked>> | 84% | 35,520 psi | 89% | 1243 fps | 100% |
| Shooters World Heavy Pistol* | <<locked>> | 80% | 34,316 psi | 86% | 1227 fps | 89.4% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 33,852 psi | 85% | 1227 fps | 94.6% |
| SNPE Vectan A0 | <<locked>> | 80% | 35,592 psi | 89% | 1089 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 72% | 35,824 psi | 90% | 1050 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 72% | 34,954 psi | 88% | 1060 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 35,723 psi | 90% | 955 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 84% | 34,345 psi | 86% | 1135 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 72% | 34,360 psi | 86% | 1056 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 72% | 34,896 psi | 87% | 1224 fps | 100% |
| Somchem MP200² | <<locked>> | 68% | 32,474 psi | 81% | 1089 fps | 100% |
| Somchem MS200² | <<locked>> | 76% | 35,737 psi | 90% | 1102 fps | 100% |
| Somchem S221² | <<locked>> | 64% | 32,285 psi | 81% | 1168 fps | 98% |
| Vihtavuori 3N37² | <<locked>> | 76% | 33,663 psi | 84% | 1145 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 92% | 34,911 psi | 88% | 1214 fps | 97.4% |
| Vihtavuori N105 | <<locked>> | 96% | 33,489 psi | 84% | 1243 fps | 99.5% |
| Vihtavuori N320² | <<locked>> | 68% | 33,692 psi | 84% | 1004 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 32,779 psi | 82% | 935 fps | 100% |
| Vihtavuori N330² | <<locked>> | 68% | 33,083 psi | 83% | 1050 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 35,679 psi | 89% | 1102 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 35,897 psi | 90% | 1161 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 76% | 33,417 psi | 84% | 1060 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 24,511 psi | 61% | 974 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 21,799 psi | 55% | 1043 fps | 87.6% |
| Accurate No. 9*² | <<locked>> | 76% | 28,950 psi | 73% | 1152 fps | 86.5% |
| Accurate Solo 1000² | <<locked>> | 60% | 25,802 psi | 65% | 909 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 22,017 psi | 55% | 909 fps | 100% |
| Accurate TCM*² | <<locked>> | 72% | 25,599 psi | 64% | 1099 fps | 85.7% |
| ADI AP 100*² | 8.7 gr | 60% | 14,663 psi | 37% | 850 fps | 90.1% |
| ADI AP 70N² | <<locked>> | 60% | 31,778 psi | 80% | 1037 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 27,369 psi | 69% | 843 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 26,484 psi | 66% | 860 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 25,541 psi | 64% | 879 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 27,180 psi | 68% | 935 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 22,843 psi | 57% | 915 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 76% | 21,495 psi | 54% | 1024 fps | 85.9% |
| Alliant BULLSEYE² | <<locked>> | 60% | 28,050 psi | 70% | 1037 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 25,092 psi | 63% | 912 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 16,331 psi | 41% | 863 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 21,466 psi | 54% | 1017 fps | 95.2% |
| Alliant RED DOT² | <<locked>> | 60% | 24,816 psi | 62% | 886 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 32,024 psi | 80% | 1089 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 22,278 psi | 56% | 965 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 24,468 psi | 61% | 899 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 15,925 psi | 40% | 797 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 26,469 psi | 66% | 948 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 24,410 psi | 61% | 948 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 27,833 psi | 70% | 856 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,122 psi | 20% | 584 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 26,411 psi | 66% | 974 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 21,799 psi | 55% | 1043 fps | 87.6% |
| Lovex D037.2*² | <<locked>> | 76% | 29,878 psi | 75% | 1168 fps | 87% |
| Lovex S020² | <<locked>> | 60% | 25,788 psi | 65% | 984 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 20,595 psi | 52% | 883 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 23,003 psi | 58% | 919 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 23,467 psi | 59% | 906 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 25,411 psi | 64% | 912 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 28,065 psi | 70% | 902 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 31,067 psi | 78% | 1083 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 29,617 psi | 74% | 984 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,702 psi | 19% | 587 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 20,610 psi | 52% | 942 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 19,116 psi | 48% | 974 fps | 87.7% |
| Rottweil P 806² | <<locked>> | 60% | 15,679 psi | 39% | 945 fps | 96.4% |
| Shooters World Heavy Pistol*² | <<locked>> | 76% | 29,878 psi | 75% | 1168 fps | 87% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 21,799 psi | 55% | 1043 fps | 87.6% |
| SNPE Vectan A0² | <<locked>> | 60% | 20,987 psi | 53% | 912 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 25,585 psi | 64% | 942 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 24,758 psi | 62% | 945 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,993 psi | 73% | 889 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 17,666 psi | 44% | 896 fps | 97.6% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 24,366 psi | 61% | 945 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 23,424 psi | 59% | 1063 fps | 97.9% |
| Somchem MP200² | <<locked>> | 60% | 25,802 psi | 65% | 1010 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 23,177 psi | 58% | 955 fps | 100% |
| Somchem S221² | <<locked>> | 60% | 27,963 psi | 70% | 1109 fps | 96.5% |
| Vihtavuori 3N37² | <<locked>> | 60% | 20,334 psi | 51% | 965 fps | 99.4% |
| Vihtavuori 3N38*² | 11.3 gr | 68% | 17,434 psi | 44% | 938 fps | 87.2% |
| Vihtavuori N105*² | 11.2 gr | 68% | 14,388 psi | 36% | 912 fps | 88% |
| Vihtavuori N320² | <<locked>> | 60% | 26,876 psi | 67% | 935 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 13,677 psi | 34% | 699 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 26,107 psi | 65% | 974 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 22,727 psi | 57% | 955 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 17,738 psi | 44% | 912 fps | 98.7% |
| Winchester AutoComp ² | <<locked>> | 60% | 21,799 psi | 55% | 922 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
* not dangerous but load has suboptimal powder burnt with possible characteristics such as extensive muzzle flash or inaccurate loads.
² fill rate low - you might want to consider using a filler to ensure proper ignition.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 12 powders for .45 Win. Mag. loaded with the .451 | 300gr | Speer Spitzer Soft Point. Rottweil P 806 delivers the highest muzzle velocity at 1,243 fps; across all powders the maximum-charge window runs from 784 fps to 1,243 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 12 of the 12 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (275 MPa), the top charges use 41–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N32C Tin Star 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. Vihtavuori N105, Vihtavuori 3N38, ADI AP 100 rank at the top here: for .45 Win. Mag. with the .451 | 300gr | Speer Spitzer Soft Point they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant BLUE DOT burn incompletely and react more sensitively to barrel length and temperature. ADI AP 100, Alliant Herco, Baschieri & Pellagri 102 Pistol 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.