Load Specifications
Load data in caliber .357 SIG with .357 | 135gr | Speer HPSB GD bullet and 66 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2 | <<locked>> | 84% | 36,767 psi | 83% | 1217 fps | 100% |
| Accurate No. 5² | <<locked>> | 72% | 39,552 psi | 89% | 1332 fps | 96.7% |
| Accurate Solo 1000 | <<locked>> | 88% | 38,943 psi | 88% | 1165 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 36,085 psi | 82% | 1194 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 28,050 psi | 63% | 1171 fps | 90.1% |
| ADI AP 70N | <<locked>> | 80% | 38,914 psi | 88% | 1240 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 39,189 psi | 89% | 1060 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 36,289 psi | 82% | 1066 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 37,304 psi | 84% | 1122 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 37,463 psi | 85% | 1168 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 37,768 psi | 85% | 1204 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 39,073 psi | 88% | 1289 fps | 100% |
| Alliant Green Dot | <<locked>> | 92% | 39,523 psi | 89% | 1191 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 29,327 psi | 66% | 1175 fps | 100% |
| Alliant POWER PISTOL* | <<locked>> | 92% | 35,462 psi | 80% | 1322 fps | 93% |
| Alliant RED DOT | <<locked>> | 92% | 39,131 psi | 88% | 1161 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 36,158 psi | 82% | 1257 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 39,334 psi | 89% | 1302 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 37,811 psi | 85% | 1158 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 29,936 psi | 68% | 1099 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 37,898 psi | 86% | 1184 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 38,276 psi | 87% | 1237 fps | 100% |
| Hodgdon Clays | <<locked>> | 96% | 38,522 psi | 87% | 1086 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 39,943 psi | 90% | 1214 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 37,014 psi | 84% | 1286 fps | 97.5% |
| Hodgdon Longshot² | <<locked>> | 72% | 36,143 psi | 82% | 1276 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 12,908 psi | 29% | 787 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 38,914 psi | 88% | 1240 fps | 100% |
| Lovex D036² | <<locked>> | 72% | 39,479 psi | 89% | 1332 fps | 96.7% |
| Lovex S011² | <<locked>> | 76% | 38,653 psi | 87% | 1188 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 36,782 psi | 83% | 1230 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 39,987 psi | 90% | 1227 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 39,102 psi | 88% | 1234 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 37,942 psi | 86% | 1188 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 38,189 psi | 86% | 1168 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 38,319 psi | 87% | 1122 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 35,926 psi | 81% | 1257 fps | 100% |
| Ramshot True Blue² | <<locked>> | 72% | 37,956 psi | 86% | 1293 fps | 98.9% |
| Ramshot Zip² | <<locked>> | 68% | 39,856 psi | 90% | 1220 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 36,230 psi | 82% | 1188 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 11,255 psi | 25% | 771 fps | 99.7% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 36,854 psi | 83% | 1273 fps | 100% |
| Rottweil P 801² | <<locked>> | 76% | 36,985 psi | 84% | 1161 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 32,692 psi | 74% | 1335 fps | 97% |
| Shooters World Auto Pistol² | <<locked>> | 72% | 39,479 psi | 89% | 1332 fps | 96.7% |
| SNPE Vectan A0 | <<locked>> | 96% | 36,724 psi | 83% | 1224 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 39,929 psi | 90% | 1214 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 38,696 psi | 87% | 1217 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 37,666 psi | 85% | 1079 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 35,708 psi | 81% | 1253 fps | 98% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 36,332 psi | 82% | 1204 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 92% | 39,465 psi | 89% | 1391 fps | 96.3% |
| Somchem MP200 | <<locked>> | 88% | 39,494 psi | 89% | 1289 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 38,421 psi | 87% | 1257 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 35,911 psi | 81% | 1299 fps | 90.3% |
| Vihtavuori 3N37 | <<locked>> | 96% | 39,276 psi | 89% | 1322 fps | 99.3% |
| Vihtavuori N310² | <<locked>> | 68% | 37,579 psi | 85% | 1079 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 36,840 psi | 83% | 1165 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 23,351 psi | 53% | 951 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 39,929 psi | 90% | 1250 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 38,696 psi | 87% | 1260 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 36,550 psi | 83% | 1283 fps | 99% |
| Winchester 231² | <<locked>> | 76% | 39,856 psi | 90% | 1220 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 39,073 psi | 88% | 1204 fps | 100% |
| Winchester 572² | <<locked>> | 64% | 35,476 psi | 80% | 1276 fps | 98% |
| Winchester AutoComp | <<locked>> | 96% | 39,305 psi | 89% | 1243 fps | 100% |
Start Load - Barrel Length: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2*² | <<locked>> | 60% | 17,593 psi | 40% | 932 fps | 93.8% |
| Accurate No. 5*² | <<locked>> | 60% | 26,266 psi | 59% | 1145 fps | 91.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 19,348 psi | 44% | 915 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 15,693 psi | 35% | 892 fps | 99.2% |
| ADI AP 100* | <<locked>> | 92% | 23,134 psi | 52% | 1089 fps | 86.7% |
| ADI AP 70N² | <<locked>> | 60% | 22,365 psi | 51% | 1027 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 22,031 psi | 50% | 866 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 20,972 psi | 47% | 883 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 19,725 psi | 45% | 902 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 20,479 psi | 46% | 951 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 16,056 psi | 36% | 906 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 60% | 20,407 psi | 46% | 1017 fps | 98.4% |
| Alliant Green Dot² | <<locked>> | 60% | 18,463 psi | 42% | 915 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 11,516 psi | 26% | 807 fps | 89.9% |
| Alliant POWER PISTOL*² | <<locked>> | 76% | 23,380 psi | 53% | 1125 fps | 85.9% |
| Alliant RED DOT² | <<locked>> | 60% | 18,898 psi | 43% | 906 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 23,206 psi | 52% | 1070 fps | 98.9% |
| Alliant UNIQUE*² | <<locked>> | 60% | 15,606 psi | 35% | 922 fps | 94.7% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 17,956 psi | 41% | 906 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 10,791 psi | 24% | 774 fps | 99.7% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 18,565 psi | 42% | 945 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 29,312 psi | 66% | 1135 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 17,172 psi | 39% | 820 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 31,241 psi | 71% | 1122 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 21,611 psi | 49% | 1053 fps | 90.4% |
| Hodgdon Longshot*² | <<locked>> | 60% | 23,830 psi | 54% | 1096 fps | 94% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 5,845 psi | 13% | 564 fps | 96.7% |
| Hodgdon Universal² | <<locked>> | 60% | 18,927 psi | 43% | 968 fps | 100% |
| Lovex D036*² | <<locked>> | 60% | 26,223 psi | 59% | 1145 fps | 91.1% |
| Lovex S011² | <<locked>> | 60% | 23,989 psi | 54% | 1014 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 17,695 psi | 40% | 955 fps | 98.2% |
| Maxam CSB 1² | <<locked>> | 60% | 15,127 psi | 34% | 876 fps | 99% |
| Maxam CSB 2² | <<locked>> | 60% | 15,345 psi | 35% | 909 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 17,608 psi | 40% | 915 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 18,942 psi | 43% | 922 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 22,002 psi | 50% | 935 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 21,625 psi | 49% | 1047 fps | 96.9% |
| Ramshot True Blue*² | <<locked>> | 60% | 25,150 psi | 57% | 1112 fps | 94.7% |
| Ramshot Zip² | <<locked>> | 60% | 31,169 psi | 70% | 1129 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 20,798 psi | 47% | 994 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,685 psi | 13% | 564 fps | 92% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 13,982 psi | 32% | 902 fps | 95.5% |
| Rottweil P 801² | <<locked>> | 60% | 24,381 psi | 55% | 1017 fps | 100% |
| Rottweil P 806* | <<locked>> | 80% | 16,955 psi | 38% | 1060 fps | 86.8% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 26,223 psi | 59% | 1145 fps | 91.1% |
| SNPE Vectan A0*² | <<locked>> | 60% | 15,156 psi | 34% | 879 fps | 94.1% |
| SNPE Vectan A1² | <<locked>> | 60% | 18,956 psi | 43% | 942 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 18,144 psi | 41% | 935 fps | 99.1% |
| SNPE Vectan BA10² | <<locked>> | 60% | 24,134 psi | 55% | 925 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 68% | 15,751 psi | 36% | 915 fps | 86.1% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 17,608 psi | 40% | 935 fps | 99.6% |
| SNPE Vectan SP 2*² | <<locked>> | 72% | 21,785 psi | 49% | 1119 fps | 87.1% |
| Somchem MP200² | <<locked>> | 60% | 18,217 psi | 41% | 971 fps | 95.5% |
| Somchem MS200² | <<locked>> | 60% | 17,056 psi | 39% | 932 fps | 96.8% |
| Somchem S221*² | <<locked>> | 72% | 28,427 psi | 64% | 1188 fps | 86.3% |
| Vihtavuori 3N37*² | <<locked>> | 64% | 15,447 psi | 35% | 932 fps | 87.2% |
| Vihtavuori N310² | <<locked>> | 60% | 30,298 psi | 68% | 1010 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 19,189 psi | 43% | 942 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 9,631 psi | 22% | 702 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 17,637 psi | 40% | 961 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 15,838 psi | 36% | 915 fps | 95.4% |
| Vihtavuori N350*² | <<locked>> | 64% | 13,619 psi | 31% | 886 fps | 85.2% |
| Winchester 231² | <<locked>> | 60% | 24,860 psi | 56% | 1047 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 33,924 psi | 77% | 1152 fps | 100% |
| Winchester 572² | <<locked>> | 60% | 30,153 psi | 68% | 1201 fps | 96.3% |
| Winchester AutoComp ² | <<locked>> | 60% | 15,389 psi | 35% | 896 fps | 98.4% |
* 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 66 powders for .357 SIG loaded with the .357 | 135gr | Speer HPSB GD. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,391 fps; across all powders the maximum-charge window runs from 771 fps to 1,391 fps. ADI AP 100 gives the best case fill at 100 %, and 49 of the 66 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 25–90 %, 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. As outliers, ADI AP 100, Alliant POWER PISTOL, Somchem S221 burn incompletely and react more sensitively to barrel length and temperature. Accurate No. 2, Accurate Solo 1000, Accurate Solo 1250 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.