Load Specifications
Load data in caliber .357 Mag. with .357 | 158gr | Sierra Sports Master bullet and 68 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori 3N38, Vihtavuori N105 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% | 35,607 psi | 82% | 1240 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 38,464 psi | 88% | 1427 fps | 94.9% |
| Accurate No. 9* | <<locked>> | 84% | 38,058 psi | 87% | 1411 fps | 89.3% |
| Accurate Solo 1000² | <<locked>> | 76% | 38,101 psi | 88% | 1171 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 37,318 psi | 86% | 1217 fps | 100% |
| Accurate TCM* | <<locked>> | 84% | 37,768 psi | 87% | 1404 fps | 90.6% |
| ADI AP 100 | <<locked>> | 96% | 37,637 psi | 87% | 1358 fps | 99.7% |
| ADI AP 70N² | <<locked>> | 68% | 39,102 psi | 90% | 1250 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 38,827 psi | 89% | 1079 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 37,710 psi | 87% | 1099 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 37,565 psi | 86% | 1135 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 37,434 psi | 86% | 1178 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 38,812 psi | 89% | 1220 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 36,767 psi | 85% | 1398 fps | 93.3% |
| Alliant BULLSEYE² | <<locked>> | 72% | 39,059 psi | 90% | 1306 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 36,883 psi | 85% | 1175 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 38,943 psi | 90% | 1306 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 38,711 psi | 89% | 1417 fps | 99.6% |
| Alliant RED DOT | <<locked>> | 80% | 38,377 psi | 88% | 1161 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 36,303 psi | 83% | 1280 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 37,826 psi | 87% | 1299 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 37,666 psi | 87% | 1168 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 38,479 psi | 88% | 1191 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 37,623 psi | 86% | 1191 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 76% | 38,203 psi | 88% | 1237 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 37,086 psi | 85% | 1093 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 35,520 psi | 82% | 1309 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 17,550 psi | 40% | 879 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 36,158 psi | 83% | 1217 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 38,464 psi | 88% | 1427 fps | 94.9% |
| Lovex D037.2* | <<locked>> | 84% | 38,870 psi | 89% | 1424 fps | 89.7% |
| Lovex S011² | <<locked>> | 64% | 36,303 psi | 83% | 1178 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 37,637 psi | 87% | 1250 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 37,971 psi | 87% | 1220 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 38,856 psi | 89% | 1227 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 39,291 psi | 90% | 1211 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 37,811 psi | 87% | 1175 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 37,507 psi | 86% | 1125 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 96% | 37,884 psi | 87% | 1447 fps | 87.6% |
| Ramshot Silhouette² | <<locked>> | 64% | 35,346 psi | 81% | 1273 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 37,115 psi | 85% | 1194 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 16,186 psi | 37% | 886 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 36,680 psi | 84% | 1276 fps | 100% |
| ReloadSwiss RS 24 | <<locked>> | 80% | 35,737 psi | 82% | 1378 fps | 95.9% |
| Rottweil P 801² | <<locked>> | 64% | 37,101 psi | 85% | 1165 fps | 100% |
| Rottweil P 806 | <<locked>> | 84% | 35,143 psi | 81% | 1385 fps | 100% |
| Shooters World Heavy Pistol* | <<locked>> | 84% | 38,870 psi | 89% | 1424 fps | 89.7% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 38,464 psi | 88% | 1427 fps | 94.9% |
| SNPE Vectan A0 | <<locked>> | 84% | 38,276 psi | 88% | 1260 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 72% | 35,041 psi | 81% | 1178 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 38,667 psi | 89% | 1234 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 38,725 psi | 89% | 1109 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 37,652 psi | 87% | 1316 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 37,202 psi | 86% | 1224 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 39,218 psi | 90% | 1424 fps | 100% |
| Somchem MP200² | <<locked>> | 72% | 35,984 psi | 83% | 1270 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 39,320 psi | 90% | 1283 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 36,970 psi | 85% | 1368 fps | 98.3% |
| Vihtavuori 3N37 | <<locked>> | 80% | 36,985 psi | 85% | 1325 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 96% | 39,044 psi | 90% | 1407 fps | 97.4% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 38,116 psi | 88% | 1444 fps | 99.5% |
| Vihtavuori N320² | <<locked>> | 72% | 37,188 psi | 85% | 1171 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 32,343 psi | 74% | 1053 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 36,579 psi | 84% | 1220 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 39,262 psi | 90% | 1280 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 35,969 psi | 83% | 1306 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 37,884 psi | 87% | 1214 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 36,869 psi | 85% | 1230 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% | 24,308 psi | 56% | 1093 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 21,219 psi | 49% | 1148 fps | 85.1% |
| Accurate No. 9* | <<locked>> | 80% | 33,417 psi | 77% | 1352 fps | 87.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 25,846 psi | 59% | 1027 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 21,596 psi | 50% | 1017 fps | 100% |
| Accurate TCM*² | <<locked>> | 76% | 29,080 psi | 67% | 1280 fps | 86.1% |
| ADI AP 100*² | 6.2 gr | 60% | 14,576 psi | 34% | 945 fps | 88.2% |
| ADI AP 70N² | <<locked>> | 60% | 31,589 psi | 73% | 1165 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 27,557 psi | 63% | 955 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 26,397 psi | 61% | 971 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 25,179 psi | 58% | 991 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 27,093 psi | 62% | 1056 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 22,756 psi | 52% | 1030 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 80% | 23,699 psi | 54% | 1184 fps | 85.8% |
| Alliant BULLSEYE² | <<locked>> | 60% | 27,833 psi | 64% | 1165 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 25,106 psi | 58% | 1030 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 16,114 psi | 37% | 961 fps | 99.8% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 21,205 psi | 49% | 1129 fps | 93.6% |
| Alliant RED DOT² | <<locked>> | 60% | 24,816 psi | 57% | 1001 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 31,705 psi | 73% | 1220 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 22,408 psi | 52% | 1086 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 24,004 psi | 55% | 1010 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 15,998 psi | 37% | 899 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 26,614 psi | 61% | 1070 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 24,323 psi | 56% | 1070 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 22,031 psi | 51% | 909 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 31,604 psi | 73% | 1260 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,093 psi | 19% | 659 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 25,759 psi | 59% | 1089 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 21,219 psi | 49% | 1148 fps | 85.1% |
| Lovex D037.2* | <<locked>> | 80% | 34,142 psi | 78% | 1362 fps | 87.5% |
| Lovex S011² | <<locked>> | 60% | 32,329 psi | 74% | 1135 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 25,657 psi | 59% | 1109 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 20,697 psi | 48% | 997 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 22,220 psi | 51% | 1027 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 23,917 psi | 55% | 1027 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 25,643 psi | 59% | 1033 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 28,500 psi | 66% | 1024 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 92% | 33,170 psi | 76% | 1381 fps | 85.3% |
| Ramshot Silhouette² | <<locked>> | 60% | 31,241 psi | 72% | 1220 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 29,631 psi | 68% | 1109 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,760 psi | 18% | 666 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 20,581 psi | 47% | 1060 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 18,797 psi | 43% | 1076 fps | 85.4% |
| Rottweil P 801² | <<locked>> | 60% | 33,315 psi | 77% | 1125 fps | 100% |
| Rottweil P 806*² | <<locked>> | 60% | 15,287 psi | 35% | 1037 fps | 94.4% |
| Shooters World Heavy Pistol* | <<locked>> | 80% | 34,142 psi | 78% | 1362 fps | 87.5% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 21,219 psi | 49% | 1148 fps | 85.1% |
| SNPE Vectan A0² | <<locked>> | 60% | 20,421 psi | 47% | 1017 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 25,469 psi | 59% | 1060 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 24,671 psi | 57% | 1066 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 29,066 psi | 67% | 1004 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 17,782 psi | 41% | 1004 fps | 96.6% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 24,497 psi | 56% | 1066 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 23,076 psi | 53% | 1181 fps | 96.6% |
| Somchem MP200² | <<locked>> | 60% | 25,512 psi | 59% | 1132 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 22,771 psi | 52% | 1066 fps | 100% |
| Somchem S221² | <<locked>> | 60% | 27,702 psi | 64% | 1234 fps | 95.2% |
| Vihtavuori 3N37² | <<locked>> | 60% | 20,334 psi | 47% | 1079 fps | 98.7% |
| Vihtavuori 3N38*² | 8.5 gr | 72% | 19,479 psi | 45% | 1093 fps | 87.3% |
| Vihtavuori N105*² | 8.4 gr | 72% | 16,012 psi | 37% | 1060 fps | 87.9% |
| Vihtavuori N320² | <<locked>> | 60% | 26,382 psi | 61% | 1050 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 13,808 psi | 32% | 794 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 25,541 psi | 59% | 1093 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 22,234 psi | 51% | 1063 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 17,564 psi | 40% | 1017 fps | 97.7% |
| Winchester 231² | <<locked>> | 60% | 34,098 psi | 78% | 1175 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 21,480 psi | 49% | 1030 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 15 powders for .357 Mag. loaded with the .357 | 158gr | Sierra Sports Master. Vihtavuori N105 delivers the highest muzzle velocity at 1,444 fps; across all powders the maximum-charge window runs from 879 fps to 1,444 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 15 of the 15 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 37–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N105 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 3N38, Vihtavuori N105, ADI AP 100 rank at the top here: for .357 Mag. with the .357 | 158gr | Sierra Sports Master 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. Baschieri & Pellagri 102 Pistol, Hodgdon Clays, 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.