Load Specifications
Load data in caliber .41 Special with .410 | 170gr | Sierra Sports Master bullet and 61 powders. The key underlying parameters are shown in the table above.
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: 4"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2 | <<locked>> | 80% | 28,253 psi | 78% | 1050 fps | 96.3% |
| Accurate No. 5*² | <<locked>> | 68% | 29,530 psi | 82% | 1119 fps | 88.4% |
| Accurate Solo 1000 | <<locked>> | 84% | 32,271 psi | 90% | 1050 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 32,126 psi | 89% | 1099 fps | 100% |
| ADI AP 70N² | <<locked>> | 76% | 31,270 psi | 87% | 1106 fps | 100% |
| ADI APS 350 | <<locked>> | 80% | 32,271 psi | 90% | 951 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 31,444 psi | 87% | 974 fps | 100% |
| ADI AS 30 | <<locked>> | 84% | 31,386 psi | 87% | 1017 fps | 100% |
| ADI AS 50N | <<locked>> | 80% | 30,632 psi | 85% | 1047 fps | 100% |
| Alliant BE-86 | <<locked>> | 88% | 30,269 psi | 84% | 1073 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 80% | 30,864 psi | 86% | 1129 fps | 99.5% |
| Alliant Green Dot | <<locked>> | 84% | 30,240 psi | 84% | 1047 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 25,657 psi | 71% | 1060 fps | 97.6% |
| Alliant RED DOT | <<locked>> | 88% | 31,560 psi | 88% | 1037 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 32,198 psi | 89% | 1145 fps | 99.3% |
| Alliant UNIQUE | <<locked>> | 92% | 30,734 psi | 85% | 1135 fps | 99.1% |
| Baschieri & Pellagri 100 | <<locked>> | 84% | 30,066 psi | 84% | 1033 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 25,788 psi | 72% | 1004 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 80% | 29,428 psi | 82% | 1050 fps | 100% |
| Hodgdon CFE Pistol | <<locked>> | 88% | 32,068 psi | 89% | 1109 fps | 100% |
| Hodgdon Clays | <<locked>> | 92% | 31,894 psi | 89% | 978 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 31,517 psi | 88% | 1076 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 76% | 31,386 psi | 87% | 1138 fps | 91.9% |
| Hodgdon Longshot*² | <<locked>> | 72% | 30,995 psi | 86% | 1135 fps | 93.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 11,052 psi | 31% | 712 fps | 99.8% |
| Hodgdon Universal | <<locked>> | 84% | 31,270 psi | 87% | 1106 fps | 100% |
| Lovex D036*² | <<locked>> | 68% | 29,530 psi | 82% | 1122 fps | 88.4% |
| Lovex S011² | <<locked>> | 72% | 30,124 psi | 84% | 1047 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 31,647 psi | 88% | 1115 fps | 99.9% |
| Maxam CSB 1 | <<locked>> | 96% | 31,923 psi | 89% | 1093 fps | 100% |
| Maxam CSB 2 | <<locked>> | 92% | 30,342 psi | 84% | 1096 fps | 100% |
| Maxam CSB 3 | <<locked>> | 88% | 31,299 psi | 87% | 1070 fps | 100% |
| Maxam CSB 4 | <<locked>> | 84% | 31,082 psi | 86% | 1050 fps | 100% |
| Maxam CSB 5 | <<locked>> | 80% | 32,082 psi | 89% | 1017 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 31,053 psi | 86% | 1129 fps | 97.8% |
| Ramshot True Blue*² | <<locked>> | 72% | 32,576 psi | 90% | 1152 fps | 94.4% |
| Ramshot Zip² | <<locked>> | 64% | 30,284 psi | 84% | 1070 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 30,705 psi | 85% | 1089 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 9,964 psi | 28% | 699 fps | 96.4% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 31,357 psi | 87% | 1152 fps | 100% |
| Rottweil P 801² | <<locked>> | 72% | 29,095 psi | 81% | 1037 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 25,266 psi | 70% | 1148 fps | 88.9% |
| Shooters World Auto Pistol*² | <<locked>> | 68% | 29,530 psi | 82% | 1122 fps | 88.4% |
| SNPE Vectan A0 | <<locked>> | 92% | 30,095 psi | 84% | 1083 fps | 98.8% |
| SNPE Vectan A1 | <<locked>> | 84% | 32,198 psi | 89% | 1083 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 84% | 31,009 psi | 86% | 1079 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 76% | 32,518 psi | 90% | 984 fps | 100% |
| SNPE Vectan BA7 1/2*ᴾ | <<locked>> | 100% | 30,676 psi | 85% | 1115 fps | 92.8% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 32,184 psi | 89% | 1106 fps | 100% |
| Somchem MP200 | <<locked>> | 84% | 30,690 psi | 85% | 1119 fps | 98.3% |
| Somchem MS200 | <<locked>> | 88% | 30,560 psi | 85% | 1102 fps | 99.5% |
| Vihtavuori 3N37* | <<locked>> | 92% | 29,298 psi | 81% | 1122 fps | 93.4% |
| Vihtavuori N310² | <<locked>> | 64% | 29,559 psi | 82% | 965 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 32,445 psi | 90% | 1076 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 20,146 psi | 56% | 876 fps | 100% |
| Vihtavuori N330 | <<locked>> | 84% | 30,734 psi | 85% | 1109 fps | 100% |
| Vihtavuori N340 | <<locked>> | 88% | 29,936 psi | 83% | 1096 fps | 99% |
| Vihtavuori N350*ᴾ | <<locked>> | 100% | 31,009 psi | 86% | 1142 fps | 94.5% |
| Winchester 231² | <<locked>> | 72% | 31,285 psi | 87% | 1079 fps | 100% |
| Winchester 572*² | <<locked>> | 64% | 30,414 psi | 84% | 1135 fps | 92.7% |
| Winchester AutoComp | <<locked>> | 92% | 31,125 psi | 86% | 1102 fps | 100% |
Start Load - Barrel Length: 4"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2*² | <<locked>> | 60% | 15,331 psi | 43% | 827 fps | 86.9% |
| Accurate No. 5*² | <<locked>> | 64% | 25,759 psi | 72% | 1063 fps | 86% |
| Accurate Solo 1000² | <<locked>> | 60% | 17,216 psi | 48% | 840 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 13,924 psi | 39% | 807 fps | 95.3% |
| ADI AP 70N² | <<locked>> | 60% | 19,754 psi | 55% | 938 fps | 99.3% |
| ADI APS 350² | <<locked>> | 60% | 20,726 psi | 58% | 817 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 19,218 psi | 53% | 820 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 17,709 psi | 49% | 833 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 17,825 psi | 50% | 863 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 13,706 psi | 38% | 807 fps | 97.4% |
| Alliant BULLSEYE*² | <<locked>> | 60% | 17,883 psi | 50% | 909 fps | 93.6% |
| Alliant Green Dot² | <<locked>> | 60% | 16,926 psi | 47% | 850 fps | 100% |
| Alliant Herco*² | <<locked>> | 68% | 12,386 psi | 34% | 784 fps | 86.3% |
| Alliant RED DOT² | <<locked>> | 60% | 16,273 psi | 45% | 820 fps | 100% |
| Alliant Sport Pistol*² | <<locked>> | 60% | 20,508 psi | 57% | 961 fps | 94.8% |
| Alliant UNIQUE*² | <<locked>> | 60% | 13,518 psi | 38% | 817 fps | 87.9% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 16,056 psi | 45% | 827 fps | 99.5% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 9,500 psi | 26% | 699 fps | 96.4% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 16,041 psi | 45% | 856 fps | 99.8% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 15,331 psi | 43% | 843 fps | 96% |
| Hodgdon Clays² | <<locked>> | 60% | 15,969 psi | 44% | 768 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 27,760 psi | 77% | 1030 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 64% | 21,379 psi | 59% | 981 fps | 85.1% |
| Hodgdon Longshot*² | <<locked>> | 60% | 20,291 psi | 56% | 965 fps | 86.6% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 5,410 psi | 15% | 515 fps | 91.6% |
| Hodgdon Universal² | <<locked>> | 60% | 16,476 psi | 46% | 869 fps | 97.9% |
| Lovex D036*² | <<locked>> | 64% | 25,715 psi | 71% | 1063 fps | 85.9% |
| Lovex S011² | <<locked>> | 60% | 21,074 psi | 59% | 922 fps | 99.9% |
| Lovex S020*² | <<locked>> | 60% | 15,534 psi | 43% | 860 fps | 93.2% |
| Maxam CSB 1*² | <<locked>> | 60% | 12,894 psi | 36% | 778 fps | 94.3% |
| Maxam CSB 2² | <<locked>> | 60% | 12,502 psi | 35% | 804 fps | 98.4% |
| Maxam CSB 3² | <<locked>> | 60% | 15,200 psi | 42% | 823 fps | 99.2% |
| Maxam CSB 4² | <<locked>> | 60% | 16,476 psi | 46% | 840 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 19,363 psi | 54% | 863 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 18,739 psi | 52% | 932 fps | 91% |
| Ramshot True Blue*² | <<locked>> | 60% | 21,480 psi | 60% | 981 fps | 87.7% |
| Ramshot Zip² | <<locked>> | 60% | 26,672 psi | 74% | 1024 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 17,347 psi | 48% | 902 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 64% | 5,410 psi | 15% | 522 fps | 86.2% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 11,879 psi | 33% | 787 fps | 87.7% |
| Rottweil P 801² | <<locked>> | 60% | 20,610 psi | 57% | 925 fps | 100% |
| Rottweil P 806* | <<locked>> | 96% | 22,597 psi | 63% | 1102 fps | 86.8% |
| Shooters World Auto Pistol*² | <<locked>> | 64% | 25,715 psi | 71% | 1063 fps | 85.9% |
| SNPE Vectan A0*² | <<locked>> | 60% | 13,343 psi | 37% | 784 fps | 87.5% |
| SNPE Vectan A1² | <<locked>> | 60% | 17,085 psi | 47% | 860 fps | 98.7% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 16,360 psi | 45% | 846 fps | 95.4% |
| SNPE Vectan BA10² | <<locked>> | 60% | 21,770 psi | 60% | 856 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 84% | 20,943 psi | 58% | 961 fps | 86.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 15,403 psi | 43% | 840 fps | 96.3% |
| Somchem MP200*² | <<locked>> | 60% | 15,954 psi | 44% | 866 fps | 89.3% |
| Somchem MS200*² | <<locked>> | 60% | 14,895 psi | 41% | 830 fps | 91% |
| Vihtavuori 3N37*² | <<locked>> | 76% | 18,811 psi | 52% | 948 fps | 85.8% |
| Vihtavuori N310² | <<locked>> | 60% | 26,194 psi | 73% | 928 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 16,882 psi | 47% | 866 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 8,151 psi | 23% | 633 fps | 99.9% |
| Vihtavuori N330² | <<locked>> | 60% | 14,736 psi | 41% | 856 fps | 97.5% |
| Vihtavuori N340*² | <<locked>> | 60% | 13,547 psi | 38% | 807 fps | 88.5% |
| Vihtavuori N350* | <<locked>> | 80% | 18,434 psi | 51% | 938 fps | 85.7% |
| Winchester 231² | <<locked>> | 60% | 21,843 psi | 61% | 955 fps | 99.9% |
| Winchester 572*² | <<locked>> | 60% | 26,281 psi | 73% | 1073 fps | 90.4% |
| Winchester AutoComp *² | <<locked>> | 60% | 13,082 psi | 36% | 794 fps | 93% |
* 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 35 powders for .41 Special loaded with the .410 | 170gr | Sierra Sports Master. ReloadSwiss RS 20 delivers the highest muzzle velocity at 1,152 fps; across all powders the maximum-charge window runs from 699 fps to 1,152 fps. Alliant Herco gives the best case fill at 100 %, and 35 of the 35 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (248 MPa), the top charges use 28–90 %, leaving at least 10 % headroom. Alliant Herco, Baschieri & Pellagri 102 Pistol, Hodgdon TrailBoss 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. As outliers, SNPE Vectan BA7 1/2, Vihtavuori 3N37, Vihtavuori N350 burn incompletely and react more sensitively to barrel length and temperature. Accurate Solo 1000, Accurate Solo 1250, ADI AS 30 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.