Load Specifications
Load data in caliber .357 SIG with .355 | 115gr | Geco HOLLOW POINT bullet and 66 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori 3N37, Alliant UNIQUE and Somchem MS200.
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% | 36,056 psi | 82% | 1352 fps | 99.5% |
| Accurate No. 5*² | <<locked>> | 72% | 38,348 psi | 87% | 1463 fps | 94.8% |
| Accurate Solo 1000 | <<locked>> | 88% | 36,912 psi | 83% | 1286 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 96% | 39,160 psi | 89% | 1371 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 26,948 psi | 61% | 1280 fps | 87.2% |
| ADI AP 70N | <<locked>> | 80% | 37,956 psi | 86% | 1381 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 37,362 psi | 84% | 1171 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 39,044 psi | 88% | 1227 fps | 100% |
| ADI AS 30 | <<locked>> | 92% | 39,624 psi | 90% | 1286 fps | 100% |
| ADI AS 50N | <<locked>> | 88% | 38,972 psi | 88% | 1329 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 37,086 psi | 84% | 1339 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 38,348 psi | 87% | 1430 fps | 100% |
| Alliant Green Dot | <<locked>> | 92% | 38,334 psi | 87% | 1325 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 28,819 psi | 65% | 1299 fps | 99.5% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 38,522 psi | 87% | 1512 fps | 92.4% |
| Alliant RED DOT | <<locked>> | 92% | 37,478 psi | 85% | 1286 fps | 100% |
| Alliant Sport Pistol | <<locked>> | 80% | 40,001 psi | 90% | 1453 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 37,565 psi | 85% | 1434 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 36,274 psi | 82% | 1286 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 28,863 psi | 65% | 1217 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 36,999 psi | 84% | 1319 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 36,463 psi | 82% | 1365 fps | 100% |
| Hodgdon Claysᴾ | <<locked>> | 100% | 39,566 psi | 89% | 1230 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 39,131 psi | 88% | 1355 fps | 100% |
| Hodgdon HS-6 | <<locked>> | 80% | 39,856 psi | 90% | 1467 fps | 97% |
| Hodgdon Longshot² | <<locked>> | 76% | 39,334 psi | 89% | 1460 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 12,401 psi | 28% | 873 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 37,956 psi | 86% | 1381 fps | 100% |
| Lovex D036*² | <<locked>> | 72% | 38,334 psi | 87% | 1463 fps | 94.8% |
| Lovex S011² | <<locked>> | 76% | 37,347 psi | 84% | 1319 fps | 100% |
| Lovex S020 | <<locked>> | 88% | 39,320 psi | 89% | 1404 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 38,682 psi | 87% | 1365 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 37,724 psi | 85% | 1368 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 36,492 psi | 82% | 1316 fps | 100% |
| Maxam CSB 4 | <<locked>> | 92% | 39,668 psi | 90% | 1329 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 38,116 psi | 86% | 1260 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 39,131 psi | 88% | 1440 fps | 99.9% |
| Ramshot True Blue² | <<locked>> | 72% | 35,897 psi | 81% | 1411 fps | 97.4% |
| Ramshot Zip² | <<locked>> | 68% | 37,681 psi | 85% | 1345 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 84% | 37,927 psi | 86% | 1355 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 10,820 psi | 24% | 846 fps | 98.7% |
| ReloadSwiss RS 20ᴾ | <<locked>> | 100% | 39,363 psi | 89% | 1453 fps | 100% |
| Rottweil P 801² | <<locked>> | 76% | 36,550 psi | 83% | 1299 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 30,995 psi | 70% | 1450 fps | 94.7% |
| Shooters World Auto Pistol*² | <<locked>> | 72% | 38,334 psi | 87% | 1463 fps | 94.8% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 39,581 psi | 89% | 1404 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 38,479 psi | 87% | 1345 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 37,217 psi | 84% | 1348 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 37,797 psi | 85% | 1214 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 33,852 psi | 77% | 1368 fps | 96.1% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 38,914 psi | 88% | 1381 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 92% | 38,290 psi | 87% | 1529 fps | 94.3% |
| Somchem MP200 | <<locked>> | 88% | 37,405 psi | 85% | 1414 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 37,028 psi | 84% | 1388 fps | 100% |
| Somchem S221* | <<locked>> | 84% | 39,392 psi | 89% | 1486 fps | 89.7% |
| Vihtavuori 3N37 | <<locked>> | 96% | 37,840 psi | 86% | 1453 fps | 98.2% |
| Vihtavuori N310² | <<locked>> | 68% | 36,695 psi | 83% | 1207 fps | 100% |
| Vihtavuori N320 | <<locked>> | 88% | 39,653 psi | 90% | 1335 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 22,989 psi | 52% | 1066 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 38,363 psi | 87% | 1385 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 36,811 psi | 83% | 1385 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 35,650 psi | 81% | 1417 fps | 97.8% |
| Winchester 231² | <<locked>> | 76% | 38,812 psi | 88% | 1358 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 38,348 psi | 87% | 1342 fps | 100% |
| Winchester 572² | <<locked>> | 68% | 39,769 psi | 90% | 1476 fps | 97.8% |
| Winchester AutoComp | <<locked>> | 96% | 37,913 psi | 86% | 1378 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. 2*² | <<locked>> | 60% | 17,187 psi | 39% | 1027 fps | 91.5% |
| Accurate No. 5*² | <<locked>> | 60% | 25,063 psi | 57% | 1247 fps | 88.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 18,855 psi | 43% | 1017 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 14,968 psi | 34% | 978 fps | 97.8% |
| ADI AP 100* | <<locked>> | 96% | 24,671 psi | 56% | 1237 fps | 85.5% |
| ADI AP 70N² | <<locked>> | 60% | 21,538 psi | 49% | 1135 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 22,205 psi | 50% | 978 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 20,755 psi | 47% | 988 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 18,565 psi | 42% | 991 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 19,740 psi | 45% | 1050 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 15,548 psi | 35% | 997 fps | 99.5% |
| Alliant BULLSEYE² | <<locked>> | 60% | 19,986 psi | 45% | 1122 fps | 97% |
| Alliant Green Dot² | <<locked>> | 60% | 17,941 psi | 41% | 1017 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 10,921 psi | 25% | 876 fps | 86.5% |
| Alliant POWER PISTOL* | <<locked>> | 84% | 28,297 psi | 64% | 1345 fps | 87.1% |
| Alliant RED DOT² | <<locked>> | 60% | 17,840 psi | 40% | 994 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 22,263 psi | 50% | 1171 fps | 97.5% |
| Alliant UNIQUE*² | 4.6 gr | 60% | 15,258 psi | 34% | 1014 fps | 92.5% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 17,187 psi | 39% | 997 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 10,341 psi | 23% | 846 fps | 98.7% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 17,825 psi | 40% | 1043 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 27,731 psi | 63% | 1247 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 17,231 psi | 39% | 925 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 30,284 psi | 68% | 1247 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 20,769 psi | 47% | 1152 fps | 87.4% |
| Hodgdon Longshot*² | <<locked>> | 60% | 22,829 psi | 52% | 1198 fps | 91.3% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 5,845 psi | 13% | 630 fps | 95% |
| Hodgdon Universal² | <<locked>> | 60% | 17,840 psi | 40% | 1056 fps | 99.5% |
| Lovex D036*² | <<locked>> | 60% | 25,019 psi | 57% | 1247 fps | 88.2% |
| Lovex S011² | <<locked>> | 60% | 23,424 psi | 53% | 1125 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 17,085 psi | 39% | 1050 fps | 96.5% |
| Maxam CSB 1² | <<locked>> | 60% | 14,417 psi | 33% | 958 fps | 97.5% |
| Maxam CSB 2² | <<locked>> | 60% | 14,417 psi | 33% | 994 fps | 99.9% |
| Maxam CSB 3² | <<locked>> | 60% | 16,940 psi | 38% | 1007 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 18,289 psi | 41% | 1024 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 20,450 psi | 46% | 1024 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 20,726 psi | 47% | 1145 fps | 94.8% |
| Ramshot True Blue*² | <<locked>> | 60% | 24,076 psi | 54% | 1217 fps | 92.2% |
| Ramshot Zip² | <<locked>> | 60% | 30,168 psi | 68% | 1253 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 19,261 psi | 44% | 1086 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,381 psi | 12% | 610 fps | 88.7% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 13,010 psi | 29% | 971 fps | 92.3% |
| Rottweil P 801² | <<locked>> | 60% | 23,467 psi | 53% | 1129 fps | 100% |
| Rottweil P 806* | <<locked>> | 84% | 18,130 psi | 41% | 1198 fps | 85.3% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 25,019 psi | 57% | 1247 fps | 88.2% |
| SNPE Vectan A0*² | <<locked>> | 60% | 14,344 psi | 32% | 955 fps | 91.3% |
| SNPE Vectan A1² | <<locked>> | 60% | 18,391 psi | 42% | 1040 fps | 99.9% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 17,637 psi | 40% | 1030 fps | 98% |
| SNPE Vectan BA10² | <<locked>> | 60% | 23,525 psi | 53% | 1030 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 76% | 18,942 psi | 43% | 1096 fps | 87.2% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 17,289 psi | 39% | 1033 fps | 98.8% |
| SNPE Vectan SP 2*² | <<locked>> | 76% | 23,134 psi | 52% | 1270 fps | 85.8% |
| Somchem MP200*² | <<locked>> | 60% | 17,405 psi | 39% | 1060 fps | 93.1% |
| Somchem MS200*² | 4.6 gr | 60% | 16,056 psi | 36% | 1010 fps | 94.5% |
| Somchem S221*² | <<locked>> | 76% | 30,385 psi | 69% | 1352 fps | 85.2% |
| Vihtavuori 3N37*² | 6.3 gr | 68% | 16,998 psi | 38% | 1076 fps | 86.6% |
| Vihtavuori N310² | <<locked>> | 60% | 28,950 psi | 65% | 1119 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 18,275 psi | 41% | 1040 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 9,137 psi | 21% | 771 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 17,013 psi | 38% | 1060 fps | 99.7% |
| Vihtavuori N340*² | <<locked>> | 60% | 15,360 psi | 35% | 1004 fps | 93.1% |
| Vihtavuori N350*² | <<locked>> | 72% | 16,447 psi | 37% | 1060 fps | 86.4% |
| Winchester 231² | <<locked>> | 60% | 23,743 psi | 54% | 1152 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 32,750 psi | 74% | 1276 fps | 100% |
| Winchester 572*² | <<locked>> | 60% | 29,646 psi | 67% | 1329 fps | 94.5% |
| Winchester AutoComp ² | <<locked>> | 60% | 14,852 psi | 34% | 984 fps | 96.7% |
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 66 powders for .357 SIG loaded with the .355 | 115gr | Geco HOLLOW POINT. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,529 fps; across all powders the maximum-charge window runs from 846 fps to 1,529 fps. ADI AP 100 gives the best case fill at 100 %, and 52 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 24–90 %, 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. Vihtavuori 3N37, Alliant UNIQUE, Somchem MS200 rank at the top here: for .357 SIG with the .355 | 115gr | Geco HOLLOW POINT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 5, ADI AP 100, Alliant POWER PISTOL 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.