Load Specifications
Load data in caliber .357 SIG with .355 | 115gr | Speer JHP bullet and 67 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: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2 | <<locked>> | 88% | 39,871 psi | 90% | 1391 fps | 99.8% |
| Accurate No. 5*² | <<locked>> | 72% | 37,275 psi | 84% | 1444 fps | 94.3% |
| Accurate Solo 1000 | <<locked>> | 88% | 37,681 psi | 85% | 1289 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 96% | 38,783 psi | 88% | 1365 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 26,760 psi | 60% | 1273 fps | 86.9% |
| ADI AP 70N | <<locked>> | 80% | 37,608 psi | 85% | 1371 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 38,058 psi | 86% | 1175 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 38,580 psi | 87% | 1217 fps | 100% |
| ADI AS 30 | <<locked>> | 92% | 39,175 psi | 89% | 1276 fps | 100% |
| ADI AS 50N | <<locked>> | 88% | 38,609 psi | 87% | 1322 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 36,811 psi | 83% | 1332 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 37,956 psi | 86% | 1424 fps | 100% |
| Alliant Green Dot | <<locked>> | 92% | 37,971 psi | 86% | 1319 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 28,616 psi | 65% | 1296 fps | 99.5% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 37,391 psi | 85% | 1490 fps | 91.7% |
| Alliant RED DOT | <<locked>> | 96% | 39,508 psi | 89% | 1302 fps | 100% |
| Alliant Sport Pistol | <<locked>> | 80% | 39,726 psi | 90% | 1444 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 37,289 psi | 84% | 1424 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 92% | 39,682 psi | 90% | 1319 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 28,616 psi | 65% | 1211 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 36,912 psi | 83% | 1316 fps | 100% |
| Hodgdon CFE Pistol | <<locked>> | 92% | 38,754 psi | 88% | 1378 fps | 100% |
| Hodgdon Claysᴾ | <<locked>> | 100% | 39,175 psi | 89% | 1224 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 38,812 psi | 88% | 1345 fps | 100% |
| Hodgdon HS-6 | <<locked>> | 80% | 39,813 psi | 90% | 1463 fps | 96.9% |
| Hodgdon Longshot² | <<locked>> | 76% | 39,233 psi | 89% | 1457 fps | 98.1% |
| Hodgdon TiteGroup² | <<locked>> | 64% | 39,711 psi | 90% | 1302 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 12,067 psi | 27% | 860 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 37,608 psi | 85% | 1371 fps | 100% |
| Lovex D036*² | <<locked>> | 72% | 37,217 psi | 84% | 1444 fps | 94.3% |
| Lovex S011² | <<locked>> | 76% | 36,927 psi | 83% | 1309 fps | 100% |
| Lovex S020 | <<locked>> | 88% | 39,001 psi | 88% | 1398 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 38,363 psi | 87% | 1355 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 37,318 psi | 84% | 1362 fps | 100% |
| Maxam CSB 3 | <<locked>> | 96% | 39,726 psi | 90% | 1348 fps | 100% |
| Maxam CSB 4 | <<locked>> | 92% | 39,218 psi | 89% | 1322 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 37,579 psi | 85% | 1250 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 38,957 psi | 88% | 1434 fps | 99.9% |
| Ramshot True Blue² | <<locked>> | 72% | 35,868 psi | 81% | 1404 fps | 97.3% |
| Ramshot Zip² | <<locked>> | 68% | 37,318 psi | 84% | 1339 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 84% | 37,507 psi | 85% | 1348 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 10,950 psi | 25% | 853 fps | 98.8% |
| ReloadSwiss RS 20ᴾ | <<locked>> | 100% | 39,073 psi | 88% | 1447 fps | 100% |
| Rottweil P 801 | <<locked>> | 80% | 39,755 psi | 90% | 1332 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 30,269 psi | 68% | 1437 fps | 94.2% |
| Shooters World Auto Pistol*² | <<locked>> | 72% | 37,217 psi | 84% | 1444 fps | 94.3% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 38,247 psi | 86% | 1381 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 38,261 psi | 86% | 1339 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 37,014 psi | 84% | 1342 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 37,318 psi | 84% | 1204 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 33,721 psi | 76% | 1362 fps | 96% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 38,595 psi | 87% | 1371 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 92% | 37,086 psi | 84% | 1506 fps | 93.7% |
| Somchem MP200 | <<locked>> | 88% | 37,144 psi | 84% | 1407 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 36,738 psi | 83% | 1381 fps | 100% |
| Somchem S221* | <<locked>> | 84% | 39,537 psi | 89% | 1483 fps | 89.6% |
| Vihtavuori 3N37 | <<locked>> | 96% | 36,637 psi | 83% | 1434 fps | 97.8% |
| Vihtavuori N310² | <<locked>> | 68% | 36,042 psi | 81% | 1198 fps | 100% |
| Vihtavuori N320 | <<locked>> | 88% | 39,160 psi | 89% | 1329 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 22,626 psi | 51% | 1056 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 38,029 psi | 86% | 1378 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 36,593 psi | 83% | 1378 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 34,432 psi | 78% | 1398 fps | 97.4% |
| Winchester 231² | <<locked>> | 76% | 38,508 psi | 87% | 1352 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 38,014 psi | 86% | 1335 fps | 100% |
| Winchester 572² | <<locked>> | 68% | 38,435 psi | 87% | 1457 fps | 97.5% |
| Winchester AutoComp | <<locked>> | 96% | 36,651 psi | 83% | 1362 fps | 100% |
Start Load - Barrel Length: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2*² | <<locked>> | 60% | 16,853 psi | 38% | 1017 fps | 91.1% |
| Accurate No. 5*² | <<locked>> | 60% | 24,831 psi | 56% | 1237 fps | 87.9% |
| Accurate Solo 1000² | <<locked>> | 60% | 19,189 psi | 43% | 1024 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 15,243 psi | 34% | 984 fps | 97.9% |
| ADI AP 100* | <<locked>> | 96% | 24,540 psi | 55% | 1230 fps | 85.3% |
| ADI AP 70N² | <<locked>> | 60% | 21,915 psi | 50% | 1138 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 21,567 psi | 49% | 965 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 20,189 psi | 46% | 974 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 18,855 psi | 43% | 994 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 20,073 psi | 45% | 1053 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 15,200 psi | 34% | 984 fps | 99.3% |
| Alliant BULLSEYE² | <<locked>> | 60% | 19,566 psi | 44% | 1109 fps | 96.6% |
| Alliant Green Dot² | <<locked>> | 60% | 18,217 psi | 41% | 1020 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 11,095 psi | 25% | 879 fps | 86.7% |
| Alliant POWER PISTOL* | <<locked>> | 84% | 27,296 psi | 62% | 1322 fps | 86.3% |
| Alliant RED DOT² | <<locked>> | 60% | 18,130 psi | 41% | 997 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 21,886 psi | 49% | 1161 fps | 97.3% |
| Alliant UNIQUE*² | <<locked>> | 60% | 14,939 psi | 34% | 1004 fps | 92% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 17,477 psi | 40% | 1001 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 10,501 psi | 24% | 850 fps | 98.8% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 17,564 psi | 40% | 1033 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 16,375 psi | 37% | 1017 fps | 98.2% |
| Hodgdon Clays² | <<locked>> | 60% | 16,723 psi | 38% | 912 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 29,950 psi | 68% | 1237 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 20,566 psi | 46% | 1142 fps | 87.1% |
| Hodgdon Longshot*² | <<locked>> | 60% | 22,655 psi | 51% | 1188 fps | 91.1% |
| Hodgdon TiteGroup² | <<locked>> | 60% | 36,013 psi | 81% | 1263 fps | 100% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 5,613 psi | 13% | 614 fps | 94.3% |
| Hodgdon Universal² | <<locked>> | 60% | 18,159 psi | 41% | 1060 fps | 99.6% |
| Lovex D036*² | <<locked>> | 60% | 24,874 psi | 56% | 1237 fps | 87.9% |
| Lovex S011² | <<locked>> | 60% | 22,960 psi | 52% | 1115 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 16,694 psi | 38% | 1037 fps | 96.1% |
| Maxam CSB 1² | <<locked>> | 60% | 14,040 psi | 32% | 945 fps | 97.1% |
| Maxam CSB 2² | <<locked>> | 60% | 14,040 psi | 32% | 981 fps | 99.9% |
| Maxam CSB 3² | <<locked>> | 60% | 16,505 psi | 37% | 997 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 17,825 psi | 40% | 1010 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 20,813 psi | 47% | 1027 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 20,508 psi | 46% | 1135 fps | 94.5% |
| Ramshot True Blue*² | <<locked>> | 60% | 23,873 psi | 54% | 1207 fps | 91.9% |
| Ramshot Zip² | <<locked>> | 60% | 29,776 psi | 67% | 1243 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 19,595 psi | 44% | 1093 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,424 psi | 12% | 610 fps | 88.8% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 13,213 psi | 30% | 974 fps | 92.4% |
| Rottweil P 801² | <<locked>> | 60% | 22,989 psi | 52% | 1115 fps | 100% |
| Rottweil P 806* | <<locked>> | 88% | 20,276 psi | 46% | 1247 fps | 87.4% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 24,874 psi | 56% | 1237 fps | 87.9% |
| SNPE Vectan A0*² | <<locked>> | 60% | 14,591 psi | 33% | 958 fps | 91.5% |
| SNPE Vectan A1² | <<locked>> | 60% | 18,057 psi | 41% | 1030 fps | 99.8% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 17,318 psi | 39% | 1020 fps | 97.7% |
| SNPE Vectan BA10² | <<locked>> | 60% | 22,989 psi | 52% | 1020 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 76% | 18,753 psi | 42% | 1086 fps | 86.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 16,897 psi | 38% | 1024 fps | 98.6% |
| SNPE Vectan SP 2*² | <<locked>> | 76% | 22,960 psi | 52% | 1260 fps | 85.5% |
| Somchem MP200*² | <<locked>> | 60% | 17,100 psi | 39% | 1047 fps | 92.7% |
| Somchem MS200*² | <<locked>> | 60% | 15,737 psi | 36% | 1001 fps | 94% |
| Somchem S221* | <<locked>> | 80% | 34,693 psi | 78% | 1414 fps | 87.4% |
| Vihtavuori 3N37*² | <<locked>> | 68% | 16,752 psi | 38% | 1066 fps | 86.1% |
| Vihtavuori N310² | <<locked>> | 60% | 28,282 psi | 64% | 1109 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 18,608 psi | 42% | 1043 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 9,253 psi | 21% | 774 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 16,578 psi | 37% | 1047 fps | 99.5% |
| Vihtavuori N340*² | <<locked>> | 60% | 15,040 psi | 34% | 991 fps | 92.6% |
| Vihtavuori N350*² | <<locked>> | 72% | 16,186 psi | 37% | 1050 fps | 86% |
| Winchester 231² | <<locked>> | 60% | 24,192 psi | 55% | 1158 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 32,358 psi | 73% | 1266 fps | 100% |
| Winchester 572*² | <<locked>> | 60% | 29,443 psi | 67% | 1319 fps | 94.3% |
| Winchester AutoComp ² | <<locked>> | 60% | 14,533 psi | 33% | 971 fps | 96.4% |
* 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 46 powders for .357 SIG loaded with the .355 | 115gr | Speer JHP. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,506 fps; across all powders the maximum-charge window runs from 853 fps to 1,506 fps. Alliant Herco gives the best case fill at 100 %, and 46 of the 46 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. Alliant Herco, Baschieri & Pellagri 102 Pistol, Hodgdon Clays 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, Alliant POWER PISTOL, Rottweil P 806, SNPE Vectan SP 2 burn incompletely and react more sensitively to barrel length and temperature. Alliant Herco, Baschieri & Pellagri 102 Pistol, Hodgdon Clays 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.