Load Specifications
Load data in caliber .357 SIG with .356 | 102gr | LEE Mold 356-102-1R bullet and 66 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem MP200, Vihtavuori 3N37 and Vihtavuori N340.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2 | <<locked>> | 88% | 38,972 psi | 88% | 1526 fps | 99.6% |
| Accurate No. 5*² | <<locked>> | 72% | 36,608 psi | 83% | 1575 fps | 93.3% |
| Accurate Solo 1000 | <<locked>> | 92% | 39,755 psi | 90% | 1450 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 96% | 37,927 psi | 86% | 1496 fps | 100% |
| ADI AP 70N | <<locked>> | 80% | 36,216 psi | 82% | 1499 fps | 100% |
| ADI APS 350 | <<locked>> | 88% | 39,813 psi | 90% | 1322 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 38,116 psi | 86% | 1342 fps | 100% |
| ADI AS 30 | <<locked>> | 92% | 37,666 psi | 85% | 1398 fps | 100% |
| ADI AS 50N | <<locked>> | 88% | 38,537 psi | 87% | 1463 fps | 100% |
| Alliant BE-86 | <<locked>> | 96% | 39,813 psi | 90% | 1506 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 36,550 psi | 83% | 1545 fps | 100% |
| Alliant Green Dot | <<locked>> | 92% | 37,898 psi | 86% | 1457 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 27,282 psi | 62% | 1401 fps | 98.8% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 37,347 psi | 84% | 1631 fps | 90.8% |
| Alliant RED DOT | <<locked>> | 96% | 39,189 psi | 89% | 1440 fps | 100% |
| Alliant Sport Pistol | <<locked>> | 80% | 38,696 psi | 87% | 1578 fps | 100% |
| Alliant UNIQUEᴾ | <<locked>> | 100% | 39,276 psi | 89% | 1598 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 92% | 39,305 psi | 89% | 1453 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 27,325 psi | 62% | 1319 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 88% | 39,900 psi | 90% | 1483 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 35,186 psi | 80% | 1486 fps | 100% |
| Hodgdon Claysᴾ | <<locked>> | 100% | 39,363 psi | 89% | 1355 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 38,043 psi | 86% | 1480 fps | 100% |
| Hodgdon HS-6 | <<locked>> | 80% | 39,276 psi | 89% | 1598 fps | 96.1% |
| Hodgdon Longshot² | <<locked>> | 76% | 38,116 psi | 86% | 1585 fps | 97.3% |
| Hodgdon TiteGroup² | <<locked>> | 64% | 39,972 psi | 90% | 1444 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 10,733 psi | 24% | 919 fps | 99.8% |
| Hodgdon Universal | <<locked>> | 92% | 39,363 psi | 89% | 1542 fps | 100% |
| Lovex D036*² | <<locked>> | 72% | 36,564 psi | 83% | 1575 fps | 93.3% |
| Lovex S011² | <<locked>> | 76% | 36,289 psi | 82% | 1440 fps | 100% |
| Lovex S020 | <<locked>> | 88% | 38,348 psi | 87% | 1535 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 37,159 psi | 84% | 1483 fps | 100% |
| Maxam CSB 2ᴾ | <<locked>> | 100% | 39,044 psi | 88% | 1526 fps | 100% |
| Maxam CSB 3 | <<locked>> | 96% | 39,349 psi | 89% | 1486 fps | 100% |
| Maxam CSB 4 | <<locked>> | 92% | 39,581 psi | 89% | 1463 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 36,840 psi | 83% | 1375 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 38,043 psi | 86% | 1568 fps | 99.7% |
| Ramshot True Blue² | <<locked>> | 76% | 39,885 psi | 90% | 1601 fps | 97.8% |
| Ramshot Zip² | <<locked>> | 68% | 37,637 psi | 85% | 1483 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 84% | 36,187 psi | 82% | 1473 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 9,282 psi | 21% | 892 fps | 96.1% |
| ReloadSwiss RS 20ᴾ | <<locked>> | 100% | 38,682 psi | 87% | 1588 fps | 100% |
| Rottweil P 801 | <<locked>> | 80% | 38,450 psi | 87% | 1460 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 29,327 psi | 66% | 1549 fps | 92.7% |
| Shooters World Auto Pistol*² | <<locked>> | 72% | 36,564 psi | 83% | 1575 fps | 93.3% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 38,479 psi | 87% | 1529 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 37,898 psi | 86% | 1473 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 92% | 39,726 psi | 90% | 1512 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 36,985 psi | 84% | 1329 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 33,098 psi | 75% | 1486 fps | 95.1% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 38,334 psi | 87% | 1512 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 92% | 36,970 psi | 84% | 1650 fps | 92.7% |
| Somchem MP200 | <<locked>> | 92% | 39,900 psi | 90% | 1588 fps | 100% |
| Somchem MS200 | <<locked>> | 96% | 39,247 psi | 89% | 1555 fps | 100% |
| Somchem S221* | <<locked>> | 84% | 37,971 psi | 86% | 1604 fps | 88% |
| Vihtavuori 3N37 | <<locked>> | 96% | 35,737 psi | 81% | 1558 fps | 97% |
| Vihtavuori N310² | <<locked>> | 72% | 39,813 psi | 90% | 1371 fps | 100% |
| Vihtavuori N320 | <<locked>> | 88% | 37,985 psi | 86% | 1453 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 21,161 psi | 48% | 1152 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 36,666 psi | 83% | 1506 fps | 100% |
| Vihtavuori N340 | <<locked>> | 96% | 39,088 psi | 88% | 1552 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 34,127 psi | 77% | 1529 fps | 96.7% |
| Winchester 231² | <<locked>> | 76% | 37,637 psi | 85% | 1483 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 36,361 psi | 82% | 1453 fps | 100% |
| Winchester 572² | <<locked>> | 68% | 38,493 psi | 87% | 1601 fps | 96.9% |
| Winchester AutoComp ᴾ | <<locked>> | 100% | 39,769 psi | 90% | 1539 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% | 15,969 psi | 36% | 1096 fps | 89% |
| Accurate No. 5*² | <<locked>> | 60% | 24,105 psi | 54% | 1345 fps | 86.3% |
| Accurate Solo 1000² | <<locked>> | 60% | 17,724 psi | 40% | 1102 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 13,996 psi | 32% | 1050 fps | 96.1% |
| ADI AP 70N² | <<locked>> | 60% | 20,015 psi | 45% | 1220 fps | 99.7% |
| ADI APS 350² | <<locked>> | 60% | 20,871 psi | 47% | 1060 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 19,972 psi | 45% | 1079 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 17,260 psi | 39% | 1073 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 18,594 psi | 42% | 1142 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 13,895 psi | 31% | 1053 fps | 98.1% |
| Alliant BULLSEYE² | <<locked>> | 60% | 18,753 psi | 42% | 1201 fps | 95.3% |
| Alliant Green Dot² | <<locked>> | 60% | 16,969 psi | 38% | 1106 fps | 100% |
| Alliant Herco*² | <<locked>> | 68% | 12,140 psi | 27% | 1017 fps | 87.1% |
| Alliant POWER PISTOL* | <<locked>> | 88% | 29,675 psi | 67% | 1496 fps | 86.7% |
| Alliant RED DOT² | <<locked>> | 60% | 16,578 psi | 37% | 1076 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 21,277 psi | 48% | 1263 fps | 96.2% |
| Alliant UNIQUE*² | <<locked>> | 60% | 13,677 psi | 31% | 1070 fps | 89.2% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 16,157 psi | 37% | 1079 fps | 99.8% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 9,166 psi | 21% | 896 fps | 96.5% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 16,897 psi | 38% | 1125 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 26,600 psi | 60% | 1352 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 15,940 psi | 36% | 997 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 29,283 psi | 66% | 1358 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 64% | 22,858 psi | 52% | 1309 fps | 87.9% |
| Hodgdon Longshot*² | <<locked>> | 60% | 21,915 psi | 50% | 1289 fps | 89.4% |
| Hodgdon TiteGroup² | <<locked>> | 60% | 34,505 psi | 78% | 1381 fps | 100% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 4,409 psi | 10% | 633 fps | 88.3% |
| Hodgdon Universal² | <<locked>> | 60% | 16,737 psi | 38% | 1142 fps | 98.6% |
| Lovex D036*² | <<locked>> | 60% | 24,062 psi | 54% | 1342 fps | 86.2% |
| Lovex S011² | <<locked>> | 60% | 22,133 psi | 50% | 1217 fps | 100% |
| Lovex S020*² | <<locked>> | 60% | 15,925 psi | 36% | 1125 fps | 94.6% |
| Maxam CSB 1² | <<locked>> | 60% | 13,387 psi | 30% | 1030 fps | 95.7% |
| Maxam CSB 2² | <<locked>> | 60% | 12,894 psi | 29% | 1053 fps | 99% |
| Maxam CSB 3² | <<locked>> | 60% | 15,418 psi | 35% | 1076 fps | 99.6% |
| Maxam CSB 4² | <<locked>> | 60% | 16,897 psi | 38% | 1099 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 20,044 psi | 45% | 1125 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 20,073 psi | 45% | 1240 fps | 93.2% |
| Ramshot True Blue*² | <<locked>> | 60% | 23,105 psi | 52% | 1312 fps | 90.4% |
| Ramshot Zip² | <<locked>> | 60% | 28,964 psi | 65% | 1362 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 17,869 psi | 40% | 1175 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 72% | 5,192 psi | 12% | 692 fps | 85.8% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 12,140 psi | 27% | 1037 fps | 89.4% |
| Rottweil P 801² | <<locked>> | 60% | 21,045 psi | 48% | 1207 fps | 100% |
| Rottweil P 806* | <<locked>> | 92% | 21,886 psi | 49% | 1394 fps | 87.3% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 24,062 psi | 54% | 1342 fps | 86.2% |
| SNPE Vectan A0*² | <<locked>> | 60% | 13,256 psi | 30% | 1017 fps | 88.6% |
| SNPE Vectan A1² | <<locked>> | 60% | 17,622 psi | 40% | 1129 fps | 99.4% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 16,853 psi | 38% | 1115 fps | 96.7% |
| SNPE Vectan BA10² | <<locked>> | 60% | 22,423 psi | 51% | 1122 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 80% | 19,464 psi | 44% | 1214 fps | 86.4% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 15,896 psi | 36% | 1106 fps | 97.4% |
| SNPE Vectan SP 2* | <<locked>> | 80% | 25,280 psi | 57% | 1434 fps | 86% |
| Somchem MP200*² | 5.9 gr | 60% | 16,070 psi | 36% | 1129 fps | 90.5% |
| Somchem MS200*² | <<locked>> | 60% | 14,692 psi | 33% | 1076 fps | 91.9% |
| Somchem S221* | <<locked>> | 80% | 33,692 psi | 76% | 1535 fps | 85.9% |
| Vihtavuori 3N37*² | 7.5 gr | 72% | 17,550 psi | 40% | 1194 fps | 85.7% |
| Vihtavuori N310² | <<locked>> | 60% | 27,963 psi | 63% | 1227 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 17,187 psi | 39% | 1125 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 7,861 psi | 18% | 820 fps | 99.9% |
| Vihtavuori N330² | <<locked>> | 60% | 15,418 psi | 35% | 1125 fps | 98.5% |
| Vihtavuori N340*² | 5.4 gr | 60% | 13,851 psi | 31% | 1060 fps | 90.1% |
| Vihtavuori N350*² | <<locked>> | 76% | 17,216 psi | 39% | 1184 fps | 85.8% |
| Winchester 231² | <<locked>> | 60% | 23,221 psi | 52% | 1263 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 32,387 psi | 73% | 1401 fps | 100% |
| Winchester 572*² | <<locked>> | 60% | 28,616 psi | 65% | 1437 fps | 93% |
| Winchester AutoComp *² | <<locked>> | 60% | 13,097 psi | 30% | 1030 fps | 93.9% |
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 .356 | 102gr | LEE Mold 356-102-1R. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,650 fps; across all powders the maximum-charge window runs from 892 fps to 1,650 fps. Alliant Herco 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 21–90 %, leaving at least 10 % headroom. Alliant Herco, Alliant UNIQUE, 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. Somchem MP200, Vihtavuori 3N37, Vihtavuori N340 rank at the top here: for .357 SIG with the .356 | 102gr | LEE Mold 356-102-1R they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 5, 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.