Load Specifications
Load data in caliber .357 SIG with .355 | 115gr | Norma HP 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 ReloadSwiss RS 20.
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% | 37,057 psi | 84% | 1378 fps | 99.7% |
| Accurate No. 5² | <<locked>> | 72% | 39,595 psi | 90% | 1496 fps | 95.6% |
| Accurate Solo 1000 | <<locked>> | 88% | 38,232 psi | 86% | 1309 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 36,593 psi | 83% | 1355 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 28,050 psi | 63% | 1312 fps | 88.4% |
| ADI AP 70N | <<locked>> | 80% | 39,001 psi | 88% | 1401 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 39,030 psi | 88% | 1201 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 36,811 psi | 83% | 1214 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 37,391 psi | 85% | 1273 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 36,782 psi | 83% | 1312 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 37,739 psi | 85% | 1358 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 39,421 psi | 89% | 1457 fps | 100% |
| Alliant Green Dot | <<locked>> | 92% | 39,624 psi | 90% | 1348 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 29,399 psi | 66% | 1322 fps | 99.7% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 39,755 psi | 90% | 1542 fps | 93.2% |
| Alliant RED DOT | <<locked>> | 92% | 37,826 psi | 86% | 1299 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 36,390 psi | 82% | 1417 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 38,406 psi | 87% | 1453 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 37,507 psi | 85% | 1309 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 29,704 psi | 67% | 1237 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 38,203 psi | 86% | 1342 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 37,217 psi | 84% | 1385 fps | 100% |
| Hodgdon Clays | <<locked>> | 96% | 38,406 psi | 87% | 1230 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 35,563 psi | 80% | 1325 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 36,912 psi | 83% | 1444 fps | 96.5% |
| Hodgdon Longshot² | <<locked>> | 72% | 35,505 psi | 80% | 1424 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 12,879 psi | 29% | 889 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 39,001 psi | 88% | 1401 fps | 100% |
| Lovex D036² | <<locked>> | 72% | 39,523 psi | 89% | 1493 fps | 95.6% |
| Lovex S011² | <<locked>> | 76% | 38,551 psi | 87% | 1345 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 36,506 psi | 83% | 1385 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 39,595 psi | 90% | 1385 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 38,885 psi | 88% | 1391 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 37,652 psi | 85% | 1342 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 37,318 psi | 84% | 1316 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 38,450 psi | 87% | 1273 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 36,405 psi | 82% | 1417 fps | 99.9% |
| Ramshot True Blue² | <<locked>> | 72% | 37,144 psi | 84% | 1440 fps | 98% |
| Ramshot Zip² | <<locked>> | 68% | 39,798 psi | 90% | 1381 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 84% | 39,204 psi | 89% | 1378 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 11,255 psi | 25% | 866 fps | 99.1% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 36,695 psi | 83% | 1434 fps | 100% |
| Rottweil P 801² | <<locked>> | 76% | 37,811 psi | 85% | 1325 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 32,430 psi | 73% | 1483 fps | 95.6% |
| Shooters World Auto Pistol² | <<locked>> | 72% | 39,523 psi | 89% | 1493 fps | 95.6% |
| SNPE Vectan A0 | <<locked>> | 96% | 37,014 psi | 84% | 1385 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 39,160 psi | 89% | 1362 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 37,971 psi | 86% | 1368 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 37,971 psi | 86% | 1227 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 34,998 psi | 79% | 1398 fps | 96.8% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 39,813 psi | 90% | 1401 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 92% | 39,552 psi | 89% | 1558 fps | 95.1% |
| Somchem MP200 | <<locked>> | 88% | 39,117 psi | 88% | 1447 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 37,826 psi | 86% | 1407 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 36,347 psi | 82% | 1457 fps | 88.9% |
| Vihtavuori 3N37 | <<locked>> | 96% | 39,160 psi | 89% | 1483 fps | 98.7% |
| Vihtavuori N310² | <<locked>> | 68% | 37,217 psi | 84% | 1224 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 37,159 psi | 84% | 1319 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 23,366 psi | 53% | 1079 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 39,450 psi | 89% | 1407 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 37,623 psi | 85% | 1407 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 36,056 psi | 82% | 1437 fps | 98.2% |
| Winchester 231² | <<locked>> | 76% | 39,798 psi | 90% | 1381 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 39,392 psi | 89% | 1365 fps | 100% |
| Winchester 572² | <<locked>> | 64% | 34,969 psi | 79% | 1424 fps | 96.8% |
| Winchester AutoComp | <<locked>> | 96% | 38,348 psi | 87% | 1394 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% | 17,593 psi | 40% | 1047 fps | 92.3% |
| Accurate No. 5*² | <<locked>> | 60% | 25,628 psi | 58% | 1270 fps | 89% |
| Accurate Solo 1000² | <<locked>> | 60% | 19,508 psi | 44% | 1040 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 15,505 psi | 35% | 1001 fps | 98.3% |
| ADI AP 100* | <<locked>> | 96% | 25,875 psi | 58% | 1270 fps | 86.9% |
| ADI AP 70N² | <<locked>> | 60% | 22,785 psi | 52% | 1168 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 22,046 psi | 50% | 984 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 21,437 psi | 48% | 1007 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 19,319 psi | 44% | 1014 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 20,349 psi | 46% | 1070 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 15,940 psi | 36% | 1014 fps | 99.7% |
| Alliant BULLSEYE² | <<locked>> | 60% | 20,436 psi | 46% | 1142 fps | 97.5% |
| Alliant Green Dot² | <<locked>> | 60% | 18,565 psi | 42% | 1037 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 11,269 psi | 25% | 892 fps | 87.5% |
| Alliant POWER PISTOL* | <<locked>> | 80% | 25,773 psi | 58% | 1306 fps | 85.8% |
| Alliant RED DOT² | <<locked>> | 60% | 18,652 psi | 42% | 1017 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 23,366 psi | 53% | 1204 fps | 98.2% |
| Alliant UNIQUE*² | 4.8 gr | 60% | 15,708 psi | 36% | 1033 fps | 93.3% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 17,709 psi | 40% | 1017 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 10,733 psi | 24% | 866 fps | 99.1% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 18,536 psi | 42% | 1063 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 28,718 psi | 65% | 1270 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 17,172 psi | 39% | 928 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 31,459 psi | 71% | 1273 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 21,379 psi | 48% | 1175 fps | 88.4% |
| Hodgdon Longshot*² | <<locked>> | 60% | 23,467 psi | 53% | 1220 fps | 92.2% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 5,990 psi | 14% | 640 fps | 95.7% |
| Hodgdon Universal² | <<locked>> | 60% | 19,058 psi | 43% | 1089 fps | 99.8% |
| Lovex D036*² | <<locked>> | 60% | 25,585 psi | 58% | 1270 fps | 89% |
| Lovex S011² | <<locked>> | 60% | 23,859 psi | 54% | 1142 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 17,535 psi | 40% | 1066 fps | 97% |
| Maxam CSB 1² | <<locked>> | 60% | 14,924 psi | 34% | 978 fps | 98% |
| Maxam CSB 2² | <<locked>> | 60% | 15,069 psi | 34% | 1014 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 17,492 psi | 40% | 1030 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 18,942 psi | 43% | 1043 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 21,234 psi | 48% | 1043 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 21,582 psi | 49% | 1171 fps | 95.6% |
| Ramshot True Blue*² | <<locked>> | 60% | 24,642 psi | 56% | 1237 fps | 93% |
| Ramshot Zip² | <<locked>> | 60% | 30,298 psi | 68% | 1263 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 20,653 psi | 47% | 1119 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,497 psi | 12% | 620 fps | 89.5% |
| ReloadSwiss RS 20*² | 5 gr | 60% | 13,895 psi | 31% | 1004 fps | 93.8% |
| Rottweil P 801² | <<locked>> | 60% | 24,004 psi | 54% | 1142 fps | 100% |
| Rottweil P 806* | <<locked>> | 84% | 19,493 psi | 44% | 1237 fps | 87.1% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 25,585 psi | 58% | 1270 fps | 89% |
| SNPE Vectan A0*² | <<locked>> | 60% | 14,736 psi | 33% | 971 fps | 92.1% |
| SNPE Vectan A1² | <<locked>> | 60% | 18,724 psi | 42% | 1056 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 17,970 psi | 41% | 1047 fps | 98.3% |
| SNPE Vectan BA10² | <<locked>> | 60% | 23,235 psi | 53% | 1037 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 72% | 17,376 psi | 39% | 1066 fps | 86% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 17,753 psi | 40% | 1053 fps | 99.2% |
| SNPE Vectan SP 2*² | <<locked>> | 76% | 24,482 psi | 55% | 1306 fps | 87.3% |
| Somchem MP200*² | <<locked>> | 60% | 17,724 psi | 40% | 1076 fps | 93.7% |
| Somchem MS200² | <<locked>> | 60% | 16,476 psi | 37% | 1030 fps | 95.1% |
| Somchem S221*² | <<locked>> | 76% | 32,126 psi | 73% | 1394 fps | 86.8% |
| Vihtavuori 3N37*² | 6.2 gr | 64% | 15,548 psi | 35% | 1047 fps | 85.3% |
| Vihtavuori N310² | <<locked>> | 60% | 29,747 psi | 67% | 1135 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 18,956 psi | 43% | 1060 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 9,718 psi | 22% | 794 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 17,506 psi | 40% | 1076 fps | 99.8% |
| Vihtavuori N340*² | <<locked>> | 60% | 15,766 psi | 36% | 1020 fps | 93.8% |
| Vihtavuori N350*² | <<locked>> | 72% | 17,172 psi | 39% | 1089 fps | 87.7% |
| Winchester 231² | <<locked>> | 60% | 24,918 psi | 56% | 1181 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 33,924 psi | 77% | 1302 fps | 100% |
| Winchester 572² | <<locked>> | 60% | 30,371 psi | 69% | 1352 fps | 95.1% |
| Winchester AutoComp ² | <<locked>> | 60% | 15,142 psi | 34% | 997 fps | 97.2% |
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 | Norma HP. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,558 fps; across all powders the maximum-charge window runs from 866 fps to 1,558 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. Vihtavuori 3N37, Alliant UNIQUE, ReloadSwiss RS 20 rank at the top here: for .357 SIG with the .355 | 115gr | Norma HP they combine a high case fill with complete burn and sit in the upper velocity band. 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.