Load Specifications
Load data in caliber .357 SIG with .357 | 140gr | Speer JHP bullet and 66 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, Alliant UNIQUE and Somchem MP200.
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: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2 | <<locked>> | 84% | 38,450 psi | 87% | 1214 fps | 100% |
| Accurate No. 5² | <<locked>> | 68% | 35,259 psi | 80% | 1260 fps | 96% |
| Accurate Solo 1000 | <<locked>> | 88% | 39,059 psi | 88% | 1142 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 37,724 psi | 85% | 1184 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 29,269 psi | 66% | 1175 fps | 91.6% |
| ADI AP 70N² | <<locked>> | 76% | 36,695 psi | 83% | 1194 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 39,160 psi | 89% | 1040 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 37,695 psi | 85% | 1060 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 38,928 psi | 88% | 1115 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 37,695 psi | 85% | 1148 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 39,320 psi | 89% | 1194 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 80% | 36,738 psi | 83% | 1237 fps | 100% |
| Alliant Green Dot | <<locked>> | 88% | 38,450 psi | 87% | 1158 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 30,589 psi | 69% | 1168 fps | 100% |
| Alliant POWER PISTOL* | <<locked>> | 92% | 36,912 psi | 83% | 1319 fps | 94.3% |
| Alliant RED DOT | <<locked>> | 92% | 39,378 psi | 89% | 1138 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 37,666 psi | 85% | 1250 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 39,740 psi | 90% | 1280 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 38,000 psi | 86% | 1138 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 31,299 psi | 71% | 1089 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 39,247 psi | 89% | 1175 fps | 100% |
| Hodgdon CFE Pistol | <<locked>> | 88% | 37,492 psi | 85% | 1198 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 39,740 psi | 90% | 1056 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 36,289 psi | 82% | 1155 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 37,391 psi | 85% | 1270 fps | 98.1% |
| Hodgdon Longshot² | <<locked>> | 72% | 37,623 psi | 85% | 1270 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 13,068 psi | 30% | 778 fps | 100% |
| Hodgdon Universal | <<locked>> | 84% | 36,695 psi | 83% | 1194 fps | 100% |
| Lovex D036² | <<locked>> | 68% | 35,201 psi | 80% | 1257 fps | 96% |
| Lovex S011² | <<locked>> | 76% | 38,841 psi | 88% | 1168 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 38,580 psi | 87% | 1224 fps | 100% |
| Maxam CSB 1 | <<locked>> | 96% | 37,681 psi | 85% | 1181 fps | 100% |
| Maxam CSB 2 | <<locked>> | 92% | 36,985 psi | 84% | 1188 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 39,595 psi | 90% | 1181 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 38,406 psi | 87% | 1148 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 40,001 psi | 90% | 1115 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 37,449 psi | 85% | 1250 fps | 100% |
| Ramshot True Blue² | <<locked>> | 72% | 38,334 psi | 87% | 1273 fps | 99.3% |
| Ramshot Zip² | <<locked>> | 64% | 36,245 psi | 82% | 1161 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 36,666 psi | 83% | 1168 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 11,980 psi | 27% | 778 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 38,667 psi | 87% | 1266 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 96% | 38,232 psi | 86% | 1325 fps | 88.7% |
| Rottweil P 801² | <<locked>> | 76% | 38,624 psi | 87% | 1155 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 34,461 psi | 78% | 1335 fps | 98% |
| Shooters World Auto Pistol² | <<locked>> | 68% | 35,201 psi | 80% | 1257 fps | 96% |
| SNPE Vectan A0 | <<locked>> | 96% | 38,174 psi | 86% | 1217 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 84% | 36,434 psi | 82% | 1158 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 38,899 psi | 88% | 1198 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 39,073 psi | 88% | 1070 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 37,086 psi | 84% | 1250 fps | 98.7% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 37,956 psi | 86% | 1198 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 88% | 37,652 psi | 85% | 1345 fps | 96.4% |
| Somchem MP200 | <<locked>> | 88% | 39,798 psi | 90% | 1270 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 38,653 psi | 87% | 1234 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 37,347 psi | 84% | 1296 fps | 91.7% |
| Vihtavuori 3N37 | <<locked>> | 96% | 39,711 psi | 90% | 1302 fps | 99.6% |
| Vihtavuori N310² | <<locked>> | 68% | 37,782 psi | 85% | 1060 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 38,609 psi | 87% | 1155 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 24,540 psi | 55% | 948 fps | 100% |
| Vihtavuori N330 | <<locked>> | 84% | 37,521 psi | 85% | 1201 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 38,943 psi | 88% | 1237 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 38,203 psi | 86% | 1280 fps | 99.5% |
| Winchester 231² | <<locked>> | 72% | 36,245 psi | 82% | 1161 fps | 100% |
| Winchester 572² | <<locked>> | 64% | 37,072 psi | 84% | 1273 fps | 98.7% |
| Winchester AutoComp | <<locked>> | 96% | 39,610 psi | 90% | 1224 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 18,594 psi | 42% | 938 fps | 95.2% |
| Accurate No. 5*² | <<locked>> | 60% | 26,556 psi | 60% | 1132 fps | 92.1% |
| Accurate Solo 1000² | <<locked>> | 60% | 20,450 psi | 46% | 915 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 15,896 psi | 36% | 883 fps | 99.5% |
| ADI AP 100* | <<locked>> | 88% | 21,915 psi | 50% | 1047 fps | 86.6% |
| ADI AP 70N² | <<locked>> | 60% | 23,554 psi | 53% | 1027 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 23,279 psi | 53% | 866 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 22,089 psi | 50% | 879 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 19,899 psi | 45% | 886 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 20,639 psi | 47% | 935 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 16,302 psi | 37% | 892 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 60% | 21,509 psi | 49% | 1017 fps | 99.1% |
| Alliant Green Dot² | <<locked>> | 60% | 19,522 psi | 44% | 919 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 11,690 psi | 26% | 801 fps | 91% |
| Alliant POWER PISTOL*² | <<locked>> | 72% | 21,364 psi | 48% | 1066 fps | 85.1% |
| Alliant RED DOT² | <<locked>> | 60% | 19,116 psi | 43% | 889 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 23,467 psi | 53% | 1053 fps | 99.3% |
| Alliant UNIQUE² | 4.1 gr | 60% | 15,838 psi | 36% | 909 fps | 95.6% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 18,173 psi | 41% | 892 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 11,502 psi | 26% | 778 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 19,508 psi | 44% | 942 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 18,275 psi | 41% | 935 fps | 99.9% |
| Hodgdon Clays² | <<locked>> | 60% | 23,525 psi | 53% | 879 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 32,605 psi | 74% | 1115 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 22,626 psi | 51% | 1053 fps | 91.9% |
| Hodgdon Longshot² | <<locked>> | 60% | 24,976 psi | 56% | 1096 fps | 95.2% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,295 psi | 14% | 571 fps | 98% |
| Hodgdon Universal² | <<locked>> | 60% | 19,203 psi | 43% | 955 fps | 100% |
| Lovex D036*² | <<locked>> | 60% | 26,513 psi | 60% | 1132 fps | 92.1% |
| Lovex S011² | <<locked>> | 60% | 25,222 psi | 57% | 1010 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 18,811 psi | 43% | 958 fps | 99% |
| Maxam CSB 1² | <<locked>> | 60% | 15,316 psi | 35% | 863 fps | 99.3% |
| Maxam CSB 2² | <<locked>> | 60% | 15,679 psi | 35% | 896 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 17,825 psi | 40% | 902 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 19,145 psi | 43% | 909 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 22,220 psi | 50% | 919 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 22,727 psi | 51% | 1047 fps | 97.9% |
| Ramshot True Blue² | <<locked>> | 60% | 25,425 psi | 57% | 1099 fps | 95.5% |
| Ramshot Zip² | <<locked>> | 60% | 31,459 psi | 71% | 1109 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 21,176 psi | 48% | 981 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,787 psi | 13% | 558 fps | 93% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 14,185 psi | 32% | 889 fps | 96.4% |
| ReloadSwiss RS 24* | <<locked>> | 88% | 31,053 psi | 70% | 1227 fps | 85.1% |
| Rottweil P 801² | <<locked>> | 60% | 24,743 psi | 56% | 1001 fps | 100% |
| Rottweil P 806*² | 8.1 gr | 76% | 15,403 psi | 35% | 1001 fps | 85.8% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 26,513 psi | 60% | 1132 fps | 92.1% |
| SNPE Vectan A0*² | <<locked>> | 60% | 15,345 psi | 35% | 866 fps | 94.9% |
| SNPE Vectan A1² | <<locked>> | 60% | 19,870 psi | 45% | 942 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 19,087 psi | 43% | 935 fps | 99.6% |
| SNPE Vectan BA10² | <<locked>> | 60% | 24,207 psi | 55% | 909 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 64% | 14,286 psi | 32% | 863 fps | 85.1% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 18,594 psi | 42% | 935 fps | 99.9% |
| SNPE Vectan SP 2*² | <<locked>> | 68% | 20,059 psi | 45% | 1066 fps | 86.5% |
| Somchem MP200² | 4.7 gr | 60% | 18,449 psi | 42% | 958 fps | 96.3% |
| Somchem MS200² | <<locked>> | 60% | 17,260 psi | 39% | 919 fps | 97.5% |
| Somchem S221*² | <<locked>> | 68% | 25,541 psi | 58% | 1122 fps | 85.4% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 13,982 psi | 32% | 879 fps | 86.2% |
| Vihtavuori N310² | <<locked>> | 60% | 30,458 psi | 69% | 991 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 19,464 psi | 44% | 928 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 9,805 psi | 22% | 692 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 17,956 psi | 41% | 948 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 16,041 psi | 36% | 902 fps | 96.1% |
| Vihtavuori N350*² | <<locked>> | 64% | 13,808 psi | 31% | 876 fps | 86.4% |
| Winchester 231² | <<locked>> | 60% | 26,092 psi | 59% | 1043 fps | 100% |
| Winchester 572² | <<locked>> | 60% | 31,502 psi | 71% | 1201 fps | 97.3% |
| Winchester AutoComp ² | <<locked>> | 60% | 15,592 psi | 35% | 886 fps | 98.8% |
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 45 powders for .357 SIG loaded with the .357 | 140gr | Speer JHP. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,345 fps; across all powders the maximum-charge window runs from 778 fps to 1,345 fps. ADI AP 100 gives the best case fill at 100 %, and 45 of the 45 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 27–90 %, leaving at least 10 % headroom. ADI AP 100, Alliant Herco, Baschieri & Pellagri 102 Pistol 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. Rottweil P 806, Alliant UNIQUE, Somchem MP200 rank at the top here: for .357 SIG with the .357 | 140gr | Speer JHP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AP 100, Alliant POWER PISTOL burn incompletely and react more sensitively to barrel length and temperature. Accurate Solo 1000, Accurate Solo 1250, ADI APS 350 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.