Load Specifications
Load data in caliber .357 SIG with .355 | 95gr | Speer TMJ bullet and 65 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant UNIQUE, Somchem MS200 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>> | 88% | 39,305 psi | 89% | 1591 fps | 99.3% |
| Accurate No. 5*² | <<locked>> | 72% | 37,304 psi | 84% | 1647 fps | 92.7% |
| Accurate Solo 1000 | <<locked>> | 88% | 37,391 psi | 85% | 1486 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 96% | 38,551 psi | 87% | 1568 fps | 100% |
| ADI AP 70N | <<locked>> | 80% | 37,478 psi | 85% | 1578 fps | 100% |
| ADI APS 350 | <<locked>> | 88% | 39,929 psi | 90% | 1385 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 39,044 psi | 88% | 1414 fps | 100% |
| ADI AS 30 | <<locked>> | 92% | 39,175 psi | 89% | 1473 fps | 100% |
| ADI AS 50N | <<locked>> | 88% | 38,856 psi | 88% | 1526 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 36,216 psi | 82% | 1526 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 37,101 psi | 84% | 1617 fps | 100% |
| Alliant Green Dot | <<locked>> | 92% | 38,203 psi | 86% | 1522 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 28,297 psi | 64% | 1470 fps | 98.6% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 37,942 psi | 86% | 1703 fps | 90% |
| Alliant RED DOT | <<locked>> | 96% | 39,610 psi | 90% | 1506 fps | 100% |
| Alliant Sport Pistol | <<locked>> | 80% | 39,044 psi | 88% | 1650 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 37,014 psi | 84% | 1631 fps | 99.9% |
| Baschieri & Pellagri 100 | <<locked>> | 92% | 38,986 psi | 88% | 1512 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 29,066 psi | 66% | 1398 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 37,173 psi | 84% | 1512 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 35,839 psi | 81% | 1555 fps | 100% |
| Hodgdon Claysᴾ | <<locked>> | 100% | 39,218 psi | 89% | 1414 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 38,696 psi | 87% | 1552 fps | 100% |
| Hodgdon HS-6 | <<locked>> | 80% | 39,769 psi | 90% | 1670 fps | 95.6% |
| Hodgdon Longshot² | <<locked>> | 76% | 38,754 psi | 88% | 1654 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 12,140 psi | 27% | 991 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 37,478 psi | 85% | 1578 fps | 100% |
| Lovex D036*² | <<locked>> | 72% | 37,246 psi | 84% | 1644 fps | 92.6% |
| Lovex S011² | <<locked>> | 76% | 37,043 psi | 84% | 1512 fps | 100% |
| Lovex S020 | <<locked>> | 88% | 38,899 psi | 88% | 1604 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 37,710 psi | 85% | 1555 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 36,869 psi | 83% | 1562 fps | 100% |
| Maxam CSB 3 | <<locked>> | 96% | 40,016 psi | 90% | 1562 fps | 100% |
| Maxam CSB 4 | <<locked>> | 92% | 39,320 psi | 89% | 1526 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 36,970 psi | 84% | 1437 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 38,943 psi | 88% | 1644 fps | 99.5% |
| Ramshot True Blue² | <<locked>> | 72% | 35,984 psi | 81% | 1604 fps | 96% |
| Ramshot Zip² | <<locked>> | 68% | 38,247 psi | 86% | 1552 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 84% | 37,666 psi | 85% | 1552 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 10,936 psi | 25% | 971 fps | 97.5% |
| ReloadSwiss RS 20ᴾ | <<locked>> | 100% | 38,696 psi | 87% | 1657 fps | 100% |
| Rottweil P 801 | <<locked>> | 80% | 39,856 psi | 90% | 1535 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 30,589 psi | 69% | 1627 fps | 92.2% |
| Shooters World Auto Pistol*² | <<locked>> | 72% | 37,246 psi | 84% | 1644 fps | 92.6% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 38,595 psi | 87% | 1594 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 38,189 psi | 86% | 1539 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 36,941 psi | 84% | 1542 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 36,970 psi | 84% | 1388 fps | 100% |
| SNPE Vectan BA7 1/2*ᴾ | <<locked>> | 100% | 33,939 psi | 77% | 1558 fps | 94.6% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 38,899 psi | 88% | 1581 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 92% | 37,739 psi | 85% | 1722 fps | 92% |
| Somchem MP200 | <<locked>> | 88% | 37,333 psi | 84% | 1614 fps | 99.6% |
| Somchem MS200 | <<locked>> | 96% | 39,697 psi | 90% | 1627 fps | 100% |
| Somchem S221* | <<locked>> | 84% | 39,581 psi | 89% | 1686 fps | 87.6% |
| Vihtavuori 3N37 | <<locked>> | 96% | 36,492 psi | 82% | 1634 fps | 96.5% |
| Vihtavuori N310² | <<locked>> | 68% | 36,564 psi | 83% | 1391 fps | 100% |
| Vihtavuori N320 | <<locked>> | 88% | 39,059 psi | 88% | 1529 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 22,176 psi | 50% | 1211 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 37,260 psi | 84% | 1578 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 36,361 psi | 82% | 1578 fps | 99.9% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 34,983 psi | 79% | 1601 fps | 96.3% |
| Winchester 231² | <<locked>> | 76% | 38,247 psi | 86% | 1552 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 37,130 psi | 84% | 1526 fps | 100% |
| Winchester 572² | <<locked>> | 68% | 38,421 psi | 87% | 1663 fps | 96.2% |
| Winchester AutoComp | <<locked>> | 96% | 37,246 psi | 84% | 1568 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% | 16,723 psi | 38% | 1155 fps | 88.8% |
| Accurate No. 5*² | <<locked>> | 60% | 24,729 psi | 56% | 1407 fps | 85.6% |
| Accurate Solo 1000² | <<locked>> | 60% | 18,623 psi | 42% | 1165 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 15,011 psi | 34% | 1115 fps | 96.3% |
| ADI AP 70N² | <<locked>> | 60% | 21,263 psi | 48% | 1289 fps | 99.7% |
| ADI APS 350² | <<locked>> | 60% | 21,872 psi | 49% | 1122 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 20,827 psi | 47% | 1138 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 18,724 psi | 42% | 1145 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 19,899 psi | 45% | 1211 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 15,418 psi | 35% | 1132 fps | 98.5% |
| Alliant BULLSEYE*² | <<locked>> | 60% | 19,421 psi | 44% | 1260 fps | 94.9% |
| Alliant Green Dot² | <<locked>> | 60% | 17,709 psi | 40% | 1158 fps | 100% |
| Alliant Herco*² | <<locked>> | 64% | 12,227 psi | 28% | 1043 fps | 86% |
| Alliant POWER PISTOL* | <<locked>> | 88% | 30,676 psi | 69% | 1568 fps | 86.1% |
| Alliant RED DOT² | <<locked>> | 60% | 18,115 psi | 41% | 1148 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 22,408 psi | 51% | 1335 fps | 96.1% |
| Alliant UNIQUE*² | 5.4 gr | 60% | 14,939 psi | 34% | 1138 fps | 89.7% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 17,245 psi | 39% | 1145 fps | 99.9% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 10,385 psi | 23% | 965 fps | 97.4% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 18,115 psi | 41% | 1194 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 27,673 psi | 63% | 1421 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 16,984 psi | 38% | 1056 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 30,356 psi | 69% | 1430 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 64% | 23,583 psi | 53% | 1371 fps | 87.3% |
| Hodgdon Longshot*² | <<locked>> | 60% | 22,684 psi | 51% | 1355 fps | 89% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 5,685 psi | 13% | 709 fps | 92.5% |
| Hodgdon Universal² | <<locked>> | 60% | 18,130 psi | 41% | 1214 fps | 98.8% |
| Lovex D036*² | <<locked>> | 60% | 24,685 psi | 56% | 1404 fps | 85.5% |
| Lovex S011² | <<locked>> | 60% | 23,453 psi | 53% | 1293 fps | 100% |
| Lovex S020*² | <<locked>> | 60% | 16,940 psi | 38% | 1191 fps | 94.6% |
| Maxam CSB 1² | <<locked>> | 60% | 13,967 psi | 32% | 1076 fps | 95.4% |
| Maxam CSB 2² | <<locked>> | 60% | 14,330 psi | 32% | 1129 fps | 99.3% |
| Maxam CSB 3² | <<locked>> | 60% | 16,476 psi | 37% | 1142 fps | 99.7% |
| Maxam CSB 4² | <<locked>> | 60% | 17,956 psi | 41% | 1165 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 20,334 psi | 46% | 1178 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 21,118 psi | 48% | 1309 fps | 93.1% |
| Ramshot True Blue*² | <<locked>> | 60% | 23,815 psi | 54% | 1371 fps | 89.8% |
| Ramshot Zip² | <<locked>> | 60% | 29,182 psi | 66% | 1421 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 19,348 psi | 44% | 1247 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,453 psi | 12% | 699 fps | 86.3% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 13,039 psi | 29% | 1099 fps | 89.6% |
| Rottweil P 801² | <<locked>> | 60% | 22,408 psi | 51% | 1273 fps | 100% |
| Rottweil P 806* | <<locked>> | 92% | 23,525 psi | 53% | 1480 fps | 87.5% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 24,685 psi | 56% | 1404 fps | 85.5% |
| SNPE Vectan A0*² | <<locked>> | 60% | 14,098 psi | 32% | 1076 fps | 88.6% |
| SNPE Vectan A1² | <<locked>> | 60% | 18,304 psi | 41% | 1188 fps | 99.3% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 17,535 psi | 40% | 1171 fps | 96.5% |
| SNPE Vectan BA10² | <<locked>> | 60% | 23,134 psi | 52% | 1181 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 80% | 20,885 psi | 47% | 1289 fps | 86.5% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 16,926 psi | 38% | 1171 fps | 97.4% |
| SNPE Vectan SP 2* | <<locked>> | 80% | 25,962 psi | 59% | 1499 fps | 85.4% |
| Somchem MP200*² | 6.1 gr | 60% | 17,027 psi | 38% | 1191 fps | 90.6% |
| Somchem MS200*² | 5.4 gr | 60% | 15,722 psi | 36% | 1138 fps | 92% |
| Somchem S221* | <<locked>> | 80% | 34,679 psi | 78% | 1604 fps | 85.2% |
| Vihtavuori 3N37*² | <<locked>> | 72% | 18,594 psi | 42% | 1263 fps | 85.7% |
| Vihtavuori N310² | <<locked>> | 60% | 28,921 psi | 65% | 1293 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 18,318 psi | 41% | 1191 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 9,094 psi | 21% | 883 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 16,375 psi | 37% | 1191 fps | 98.5% |
| Vihtavuori N340*² | <<locked>> | 60% | 14,866 psi | 34% | 1122 fps | 90.2% |
| Vihtavuori N350*² | <<locked>> | 76% | 18,217 psi | 41% | 1253 fps | 85.8% |
| Winchester 231² | <<locked>> | 60% | 23,815 psi | 54% | 1322 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 33,359 psi | 75% | 1473 fps | 100% |
| Winchester 572*² | <<locked>> | 60% | 29,225 psi | 66% | 1503 fps | 92.4% |
| Winchester AutoComp *² | <<locked>> | 60% | 14,663 psi | 33% | 1109 fps | 94.7% |
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 65 powders for .357 SIG loaded with the .355 | 95gr | Speer TMJ. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,722 fps; across all powders the maximum-charge window runs from 971 fps to 1,722 fps. Alliant Herco gives the best case fill at 100 %, and 52 of the 65 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. Alliant Herco, Baschieri & Pellagri 102 Pistol, Hodgdon Clays 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. Alliant UNIQUE, Somchem MS200, Somchem MP200 rank at the top here: for .357 SIG with the .355 | 95gr | Speer TMJ 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 Solo 1250, ADI APS 350, Alliant Herco 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.