Load Specifications
Load data in caliber .357 SIG with .355 | 115gr | LOS 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% | 36,114 psi | 82% | 1325 fps | 99.3% |
| Accurate No. 5*² | <<locked>> | 72% | 37,594 psi | 85% | 1424 fps | 94% |
| Accurate Solo 1000 | <<locked>> | 88% | 37,695 psi | 85% | 1270 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 96% | 39,465 psi | 89% | 1352 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 27,354 psi | 62% | 1257 fps | 86.7% |
| ADI AP 70N | <<locked>> | 80% | 38,914 psi | 88% | 1362 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 37,304 psi | 84% | 1148 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 39,465 psi | 89% | 1207 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 36,796 psi | 83% | 1227 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 36,709 psi | 83% | 1273 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 36,883 psi | 83% | 1312 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 38,363 psi | 87% | 1404 fps | 100% |
| Alliant Green Dot | <<locked>> | 92% | 39,842 psi | 90% | 1312 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 29,269 psi | 66% | 1280 fps | 99.4% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 37,956 psi | 86% | 1473 fps | 91.5% |
| Alliant RED DOT | <<locked>> | 92% | 38,522 psi | 87% | 1270 fps | 100% |
| Alliant Sport Pistol | <<locked>> | 80% | 39,059 psi | 88% | 1414 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 37,507 psi | 85% | 1404 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 36,376 psi | 82% | 1260 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 29,791 psi | 67% | 1204 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 37,565 psi | 85% | 1302 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 37,550 psi | 85% | 1348 fps | 100% |
| Hodgdon Clays | <<locked>> | 96% | 37,623 psi | 85% | 1188 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 39,407 psi | 89% | 1332 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 35,375 psi | 80% | 1378 fps | 95.1% |
| Hodgdon Longshot² | <<locked>> | 76% | 39,914 psi | 90% | 1440 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 13,547 psi | 31% | 866 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 38,914 psi | 88% | 1362 fps | 100% |
| Lovex D036*² | <<locked>> | 72% | 37,623 psi | 85% | 1424 fps | 94% |
| Lovex S011² | <<locked>> | 76% | 37,028 psi | 84% | 1289 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 36,260 psi | 82% | 1342 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 39,160 psi | 89% | 1342 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 38,725 psi | 88% | 1352 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 37,666 psi | 85% | 1302 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 36,927 psi | 83% | 1273 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 38,827 psi | 88% | 1243 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 39,189 psi | 89% | 1414 fps | 99.9% |
| Ramshot True Blue² | <<locked>> | 72% | 36,347 psi | 82% | 1385 fps | 97% |
| Ramshot Zip² | <<locked>> | 68% | 38,000 psi | 86% | 1322 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 84% | 38,957 psi | 88% | 1335 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 12,734 psi | 29% | 866 fps | 99.6% |
| ReloadSwiss RS 20ᴾ | <<locked>> | 100% | 38,972 psi | 88% | 1427 fps | 100% |
| Rottweil P 801² | <<locked>> | 76% | 37,376 psi | 84% | 1280 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 31,821 psi | 72% | 1437 fps | 94.5% |
| Shooters World Auto Pistol*² | <<locked>> | 72% | 37,623 psi | 85% | 1424 fps | 94% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 39,088 psi | 88% | 1368 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 39,001 psi | 88% | 1325 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 37,739 psi | 85% | 1329 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 38,101 psi | 86% | 1194 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 34,330 psi | 78% | 1345 fps | 95.8% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 39,465 psi | 89% | 1358 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 92% | 38,203 psi | 86% | 1496 fps | 93.6% |
| Somchem MP200 | <<locked>> | 88% | 38,566 psi | 87% | 1401 fps | 100% |
| Somchem MS200 | <<locked>> | 96% | 40,016 psi | 90% | 1398 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 35,317 psi | 80% | 1394 fps | 87.1% |
| Vihtavuori 3N37 | <<locked>> | 96% | 37,246 psi | 84% | 1414 fps | 97.6% |
| Vihtavuori N310² | <<locked>> | 68% | 37,188 psi | 84% | 1188 fps | 100% |
| Vihtavuori N320 | <<locked>> | 88% | 39,595 psi | 90% | 1309 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 24,468 psi | 55% | 1056 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 38,841 psi | 88% | 1368 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 37,608 psi | 85% | 1368 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 34,809 psi | 79% | 1378 fps | 97.2% |
| Winchester 231² | <<locked>> | 76% | 39,160 psi | 89% | 1335 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 38,638 psi | 87% | 1319 fps | 100% |
| Winchester 572² | <<locked>> | 68% | 39,813 psi | 90% | 1447 fps | 97.4% |
| Winchester AutoComp | <<locked>> | 96% | 38,261 psi | 86% | 1355 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% | 17,854 psi | 40% | 1014 fps | 91.5% |
| Accurate No. 5*² | <<locked>> | 60% | 25,933 psi | 59% | 1234 fps | 88.1% |
| Accurate Solo 1000² | <<locked>> | 60% | 19,870 psi | 45% | 1014 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 16,389 psi | 37% | 984 fps | 98.3% |
| ADI AP 100* | <<locked>> | 96% | 25,034 psi | 57% | 1214 fps | 85.1% |
| ADI AP 70N² | <<locked>> | 60% | 22,916 psi | 52% | 1129 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 22,771 psi | 51% | 965 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 21,509 psi | 49% | 978 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 19,798 psi | 45% | 984 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 21,263 psi | 48% | 1050 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 16,679 psi | 38% | 994 fps | 99.7% |
| Alliant BULLSEYE² | <<locked>> | 60% | 20,508 psi | 46% | 1106 fps | 96.9% |
| Alliant Green Dot² | <<locked>> | 60% | 19,363 psi | 44% | 1014 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 12,662 psi | 29% | 899 fps | 88.9% |
| Alliant POWER PISTOL* | <<locked>> | 84% | 28,572 psi | 65% | 1319 fps | 86.6% |
| Alliant RED DOT² | <<locked>> | 60% | 19,145 psi | 43% | 991 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 22,974 psi | 52% | 1161 fps | 97.5% |
| Alliant UNIQUE*² | 4.3 gr | 60% | 16,433 psi | 37% | 1014 fps | 93.2% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 18,608 psi | 42% | 997 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 11,893 psi | 27% | 863 fps | 99.5% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 19,334 psi | 44% | 1043 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 28,587 psi | 65% | 1230 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 17,941 psi | 41% | 912 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 31,444 psi | 71% | 1237 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 21,756 psi | 49% | 1142 fps | 87.6% |
| Hodgdon Longshot*² | <<locked>> | 60% | 23,830 psi | 54% | 1188 fps | 91.4% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,252 psi | 16% | 643 fps | 97.7% |
| Hodgdon Universal² | <<locked>> | 60% | 19,798 psi | 45% | 1066 fps | 99.8% |
| Lovex D036*² | <<locked>> | 60% | 25,875 psi | 58% | 1234 fps | 88.1% |
| Lovex S011² | <<locked>> | 60% | 23,859 psi | 54% | 1109 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 18,246 psi | 41% | 1047 fps | 96.9% |
| Maxam CSB 1² | <<locked>> | 60% | 15,229 psi | 34% | 948 fps | 97.7% |
| Maxam CSB 2² | <<locked>> | 60% | 15,693 psi | 35% | 991 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 17,535 psi | 40% | 991 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 19,522 psi | 44% | 1020 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 21,582 psi | 49% | 1017 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 22,031 psi | 50% | 1145 fps | 95.1% |
| Ramshot True Blue*² | <<locked>> | 60% | 24,236 psi | 55% | 1191 fps | 91.7% |
| Ramshot Zip² | <<locked>> | 60% | 30,269 psi | 68% | 1227 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 20,668 psi | 47% | 1083 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 7,179 psi | 16% | 646 fps | 93.8% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 14,518 psi | 33% | 984 fps | 93.7% |
| Rottweil P 801² | <<locked>> | 60% | 24,947 psi | 56% | 1119 fps | 100% |
| Rottweil P 806* | <<locked>> | 84% | 19,435 psi | 44% | 1204 fps | 86.2% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 25,875 psi | 58% | 1234 fps | 88.1% |
| SNPE Vectan A0*² | <<locked>> | 60% | 15,664 psi | 35% | 961 fps | 92.2% |
| SNPE Vectan A1² | <<locked>> | 60% | 19,160 psi | 43% | 1030 fps | 99.9% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 18,333 psi | 41% | 1017 fps | 98% |
| SNPE Vectan BA10² | <<locked>> | 60% | 23,409 psi | 53% | 1007 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 72% | 17,579 psi | 40% | 1030 fps | 85.1% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 18,159 psi | 41% | 1024 fps | 98.9% |
| SNPE Vectan SP 2*² | <<locked>> | 76% | 24,642 psi | 56% | 1270 fps | 86.4% |
| Somchem MP200*² | 4.9 gr | 60% | 18,594 psi | 42% | 1056 fps | 93.6% |
| Somchem MS200*² | <<locked>> | 60% | 16,969 psi | 38% | 1004 fps | 94.8% |
| Somchem S221*² | <<locked>> | 76% | 31,879 psi | 72% | 1342 fps | 85.3% |
| Vihtavuori 3N37*² | 5.9 gr | 68% | 17,898 psi | 40% | 1070 fps | 86.9% |
| Vihtavuori N310² | <<locked>> | 60% | 29,211 psi | 66% | 1096 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 19,798 psi | 45% | 1040 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 10,747 psi | 24% | 781 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 18,014 psi | 41% | 1053 fps | 99.8% |
| Vihtavuori N340*² | <<locked>> | 60% | 16,404 psi | 37% | 1001 fps | 93.6% |
| Vihtavuori N350*² | <<locked>> | 72% | 17,202 psi | 39% | 1050 fps | 86.7% |
| Winchester 231² | <<locked>> | 60% | 24,714 psi | 56% | 1142 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 34,040 psi | 77% | 1266 fps | 100% |
| Winchester 572*² | <<locked>> | 60% | 29,530 psi | 67% | 1296 fps | 93.9% |
| Winchester AutoComp ² | <<locked>> | 60% | 16,157 psi | 37% | 984 fps | 97.3% |
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 | LOS RN FMJ. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,496 fps; across all powders the maximum-charge window runs from 866 fps to 1,496 fps. ADI AP 100 gives the best case fill at 100 %, and 51 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 29–90 %, 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 | LOS RN FMJ 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.