Load Specifications
Load data in caliber .357 SIG with .355 | 115gr | Frontier RN FMJ 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 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% | 36,187 psi | 82% | 1339 fps | 99.4% |
| Accurate No. 5² | <<locked>> | 72% | 39,247 psi | 89% | 1460 fps | 95% |
| Accurate Solo 1000 | <<locked>> | 88% | 38,072 psi | 86% | 1283 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 96% | 39,537 psi | 89% | 1362 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 28,689 psi | 65% | 1293 fps | 88.1% |
| ADI AP 70N² | <<locked>> | 76% | 36,854 psi | 83% | 1345 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 37,956 psi | 86% | 1165 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 39,784 psi | 90% | 1220 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 38,667 psi | 87% | 1257 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 38,334 psi | 87% | 1306 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 39,059 psi | 88% | 1345 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 38,537 psi | 87% | 1417 fps | 100% |
| Alliant Green Dot | <<locked>> | 88% | 37,710 psi | 85% | 1299 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 30,211 psi | 68% | 1302 fps | 99.7% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 39,494 psi | 89% | 1509 fps | 92.5% |
| Alliant RED DOT | <<locked>> | 92% | 39,088 psi | 88% | 1286 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 36,811 psi | 83% | 1398 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 39,827 psi | 90% | 1440 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 37,913 psi | 86% | 1286 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 30,763 psi | 70% | 1224 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 38,189 psi | 86% | 1316 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 38,624 psi | 87% | 1371 fps | 100% |
| Hodgdon Clays | <<locked>> | 96% | 38,058 psi | 86% | 1201 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 36,042 psi | 81% | 1302 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 36,840 psi | 83% | 1411 fps | 96% |
| Hodgdon Longshot² | <<locked>> | 72% | 36,260 psi | 82% | 1404 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 14,112 psi | 32% | 886 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 39,102 psi | 88% | 1375 fps | 100% |
| Lovex D036*² | <<locked>> | 72% | 39,189 psi | 89% | 1460 fps | 94.9% |
| Lovex S011² | <<locked>> | 76% | 38,551 psi | 87% | 1319 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 37,652 psi | 85% | 1371 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 39,218 psi | 89% | 1355 fps | 100% |
| Maxam CSB 2 | <<locked>> | 92% | 36,622 psi | 83% | 1339 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 38,029 psi | 86% | 1319 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 37,289 psi | 84% | 1289 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 39,291 psi | 89% | 1257 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 39,813 psi | 90% | 1437 fps | 100% |
| Ramshot True Blue² | <<locked>> | 72% | 37,869 psi | 86% | 1421 fps | 97.7% |
| Ramshot Zip² | <<locked>> | 68% | 39,204 psi | 89% | 1348 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 36,970 psi | 84% | 1322 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 13,271 psi | 30% | 886 fps | 99.8% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 36,680 psi | 83% | 1407 fps | 100% |
| Rottweil P 801² | <<locked>> | 76% | 38,972 psi | 88% | 1306 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 33,721 psi | 76% | 1476 fps | 95.6% |
| Shooters World Auto Pistol*² | <<locked>> | 72% | 39,189 psi | 89% | 1460 fps | 94.9% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 40,016 psi | 90% | 1394 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 39,972 psi | 90% | 1348 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 38,696 psi | 87% | 1352 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 38,551 psi | 87% | 1211 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 35,737 psi | 81% | 1378 fps | 96.5% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 37,304 psi | 84% | 1345 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 92% | 39,914 psi | 90% | 1532 fps | 94.6% |
| Somchem MP200 | <<locked>> | 88% | 39,450 psi | 89% | 1421 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 37,739 psi | 85% | 1381 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 36,506 psi | 83% | 1427 fps | 88.2% |
| Vihtavuori 3N37 | <<locked>> | 96% | 39,015 psi | 88% | 1450 fps | 98.3% |
| Vihtavuori N310² | <<locked>> | 68% | 37,956 psi | 86% | 1204 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 37,405 psi | 85% | 1296 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 24,918 psi | 56% | 1073 fps | 100% |
| Vihtavuori N330 | <<locked>> | 84% | 35,375 psi | 80% | 1339 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 38,740 psi | 88% | 1394 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 36,608 psi | 83% | 1414 fps | 97.9% |
| Winchester 231² | <<locked>> | 76% | 39,204 psi | 89% | 1348 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 38,798 psi | 88% | 1332 fps | 100% |
| Winchester 572² | <<locked>> | 64% | 35,244 psi | 80% | 1401 fps | 96.5% |
| Winchester AutoComp | <<locked>> | 96% | 38,972 psi | 88% | 1375 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% | 18,391 psi | 42% | 1037 fps | 92.4% |
| Accurate No. 5*² | <<locked>> | 60% | 26,643 psi | 60% | 1260 fps | 89.1% |
| Accurate Solo 1000² | <<locked>> | 60% | 19,769 psi | 45% | 1017 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 16,302 psi | 37% | 991 fps | 98.5% |
| ADI AP 100* | <<locked>> | 96% | 26,455 psi | 60% | 1253 fps | 86.6% |
| ADI AP 70N² | <<locked>> | 60% | 23,511 psi | 53% | 1148 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 22,756 psi | 51% | 971 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 21,393 psi | 48% | 984 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 20,697 psi | 47% | 1007 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 21,176 psi | 48% | 1056 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 17,158 psi | 39% | 1010 fps | 99.9% |
| Alliant BULLSEYE² | <<locked>> | 60% | 21,103 psi | 48% | 1129 fps | 97.5% |
| Alliant Green Dot² | <<locked>> | 60% | 20,102 psi | 45% | 1037 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 12,589 psi | 28% | 902 fps | 89.2% |
| Alliant POWER PISTOL* | <<locked>> | 80% | 26,179 psi | 59% | 1286 fps | 85.5% |
| Alliant RED DOT² | <<locked>> | 60% | 20,073 psi | 45% | 1014 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 23,453 psi | 53% | 1178 fps | 97.9% |
| Alliant UNIQUE*² | 4.5 gr | 60% | 16,984 psi | 38% | 1037 fps | 94.1% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 18,550 psi | 42% | 1004 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 12,386 psi | 28% | 883 fps | 99.8% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 19,551 psi | 44% | 1056 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 29,675 psi | 67% | 1257 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 17,970 psi | 41% | 922 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 31,749 psi | 72% | 1250 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 22,466 psi | 51% | 1168 fps | 88.6% |
| Hodgdon Longshot*² | <<locked>> | 60% | 24,627 psi | 56% | 1214 fps | 92.4% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,411 psi | 17% | 653 fps | 98.2% |
| Hodgdon Universal² | <<locked>> | 60% | 20,407 psi | 46% | 1086 fps | 99.9% |
| Lovex D036*² | <<locked>> | 60% | 26,716 psi | 60% | 1260 fps | 89.1% |
| Lovex S011² | <<locked>> | 60% | 24,468 psi | 55% | 1129 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 18,739 psi | 42% | 1066 fps | 97.4% |
| Maxam CSB 1² | <<locked>> | 60% | 15,809 psi | 36% | 971 fps | 98.3% |
| Maxam CSB 2² | <<locked>> | 60% | 16,389 psi | 37% | 1014 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 18,202 psi | 41% | 1014 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 19,464 psi | 44% | 1027 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 22,495 psi | 51% | 1040 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 22,292 psi | 50% | 1158 fps | 95.6% |
| Ramshot True Blue*² | <<locked>> | 60% | 25,019 psi | 57% | 1214 fps | 92.6% |
| Ramshot Zip² | <<locked>> | 60% | 30,632 psi | 69% | 1243 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 21,451 psi | 48% | 1102 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 7,324 psi | 17% | 656 fps | 94.5% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 14,968 psi | 34% | 1007 fps | 94.6% |
| Rottweil P 801² | <<locked>> | 60% | 25,570 psi | 58% | 1135 fps | 100% |
| Rottweil P 806* | <<locked>> | 84% | 20,465 psi | 46% | 1230 fps | 87.5% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 26,716 psi | 60% | 1260 fps | 89.1% |
| SNPE Vectan A0*² | <<locked>> | 60% | 15,563 psi | 35% | 965 fps | 92.5% |
| SNPE Vectan A1² | <<locked>> | 60% | 19,595 psi | 44% | 1047 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 18,840 psi | 43% | 1037 fps | 98.4% |
| SNPE Vectan BA10² | <<locked>> | 60% | 24,192 psi | 55% | 1027 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 72% | 18,362 psi | 42% | 1060 fps | 86.4% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 18,739 psi | 42% | 1043 fps | 99.3% |
| SNPE Vectan SP 2*² | <<locked>> | 72% | 22,669 psi | 51% | 1237 fps | 85.1% |
| Somchem MP200*² | 5.1 gr | 60% | 19,014 psi | 43% | 1076 fps | 94.3% |
| Somchem MS200² | <<locked>> | 60% | 17,492 psi | 40% | 1024 fps | 95.5% |
| Somchem S221*² | <<locked>> | 76% | 33,025 psi | 75% | 1375 fps | 86.5% |
| Vihtavuori 3N37*² | 5.8 gr | 64% | 16,534 psi | 37% | 1040 fps | 85.9% |
| Vihtavuori N310² | <<locked>> | 60% | 30,168 psi | 68% | 1115 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 19,769 psi | 45% | 1047 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 11,327 psi | 26% | 801 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 18,623 psi | 42% | 1073 fps | 99.9% |
| Vihtavuori N340*² | <<locked>> | 60% | 16,882 psi | 38% | 1020 fps | 94.4% |
| Vihtavuori N350*² | <<locked>> | 68% | 15,853 psi | 36% | 1024 fps | 85.5% |
| Winchester 231² | <<locked>> | 60% | 25,106 psi | 57% | 1158 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 34,272 psi | 77% | 1280 fps | 100% |
| Winchester 572*² | <<locked>> | 60% | 30,603 psi | 69% | 1325 fps | 94.7% |
| Winchester AutoComp ² | <<locked>> | 60% | 16,549 psi | 37% | 1004 fps | 97.8% |
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 66 powders for .357 SIG loaded with the .355 | 115gr | Frontier RN FMJ. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,532 fps; across all powders the maximum-charge window runs from 886 fps to 1,532 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 30–90 %, 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 MP200 rank at the top here: for .357 SIG with the .355 | 115gr | Frontier RN FMJ they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AP 100, Alliant POWER PISTOL, Lovex D036 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.