Load Specifications
Load data in caliber .357 SIG with .355 | 124gr | Speer TMJ bullet and 65 powders. The key underlying parameters are shown in the table above.
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% | 36,767 psi | 83% | 1299 fps | 99.8% |
| Accurate No. 5² | <<locked>> | 72% | 38,899 psi | 88% | 1407 fps | 95.9% |
| Accurate Solo 1000 | <<locked>> | 88% | 38,464 psi | 87% | 1240 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 36,230 psi | 82% | 1276 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 27,949 psi | 63% | 1243 fps | 89.2% |
| ADI AP 70N | <<locked>> | 80% | 38,885 psi | 88% | 1325 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 38,348 psi | 87% | 1125 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 36,506 psi | 83% | 1142 fps | 100% |
| ADI AS 30 | <<locked>> | 92% | 39,885 psi | 90% | 1224 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 36,999 psi | 84% | 1243 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 38,218 psi | 86% | 1289 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 39,160 psi | 89% | 1375 fps | 100% |
| Alliant Green Dot | <<locked>> | 88% | 36,405 psi | 82% | 1240 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 29,718 psi | 67% | 1257 fps | 99.9% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 39,175 psi | 89% | 1457 fps | 93.7% |
| Alliant RED DOT | <<locked>> | 92% | 38,986 psi | 88% | 1240 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 36,201 psi | 82% | 1339 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 38,682 psi | 87% | 1381 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 36,883 psi | 83% | 1230 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 29,675 psi | 67% | 1168 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 38,421 psi | 87% | 1270 fps | 100% |
| Hodgdon Clays | <<locked>> | 96% | 38,406 psi | 87% | 1158 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 39,914 psi | 90% | 1296 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 36,347 psi | 82% | 1358 fps | 96.8% |
| Hodgdon Longshot² | <<locked>> | 72% | 35,694 psi | 81% | 1352 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 12,850 psi | 29% | 840 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 38,885 psi | 88% | 1325 fps | 100% |
| Lovex D036² | <<locked>> | 72% | 38,841 psi | 88% | 1407 fps | 95.9% |
| Lovex S011² | <<locked>> | 76% | 37,826 psi | 86% | 1260 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 36,521 psi | 83% | 1309 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 39,668 psi | 90% | 1309 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 38,899 psi | 88% | 1312 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 38,334 psi | 87% | 1273 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 37,579 psi | 85% | 1243 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 38,276 psi | 87% | 1198 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 36,085 psi | 82% | 1339 fps | 99.9% |
| Ramshot True Blue² | <<locked>> | 72% | 37,420 psi | 85% | 1368 fps | 98.4% |
| Ramshot Zip² | <<locked>> | 68% | 39,697 psi | 90% | 1302 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 35,317 psi | 80% | 1260 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 11,240 psi | 25% | 820 fps | 99.4% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 37,275 psi | 84% | 1362 fps | 100% |
| Rottweil P 801² | <<locked>> | 76% | 37,318 psi | 84% | 1243 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 32,924 psi | 74% | 1417 fps | 96.4% |
| Shooters World Auto Pistol² | <<locked>> | 72% | 38,841 psi | 88% | 1407 fps | 95.9% |
| SNPE Vectan A0 | <<locked>> | 96% | 37,304 psi | 84% | 1312 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 39,465 psi | 89% | 1289 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 38,218 psi | 86% | 1296 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 37,724 psi | 85% | 1155 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 35,201 psi | 80% | 1329 fps | 97.4% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 39,827 psi | 90% | 1322 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 92% | 39,363 psi | 89% | 1476 fps | 95.6% |
| Somchem MP200 | <<locked>> | 88% | 38,609 psi | 87% | 1365 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 37,942 psi | 86% | 1332 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 36,535 psi | 83% | 1388 fps | 89.8% |
| Vihtavuori 3N37 | <<locked>> | 96% | 38,508 psi | 87% | 1394 fps | 98.8% |
| Vihtavuori N310² | <<locked>> | 68% | 36,579 psi | 83% | 1148 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 37,579 psi | 85% | 1250 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 23,279 psi | 53% | 1017 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 39,581 psi | 89% | 1332 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 38,029 psi | 86% | 1335 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 36,158 psi | 82% | 1362 fps | 98.6% |
| Winchester 231² | <<locked>> | 76% | 39,697 psi | 90% | 1302 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 39,131 psi | 88% | 1286 fps | 100% |
| Winchester 572² | <<locked>> | 64% | 35,694 psi | 81% | 1358 fps | 97.6% |
| Winchester AutoComp | <<locked>> | 96% | 39,291 psi | 89% | 1329 fps | 100% |
Start Load - Barrel Length: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2*² | <<locked>> | 60% | 17,912 psi | 40% | 1001 fps | 93.3% |
| Accurate No. 5*² | <<locked>> | 60% | 25,860 psi | 58% | 1207 fps | 90% |
| Accurate Solo 1000² | <<locked>> | 60% | 19,392 psi | 44% | 981 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 15,563 psi | 35% | 948 fps | 98.8% |
| ADI AP 100* | <<locked>> | 92% | 23,409 psi | 53% | 1161 fps | 85.9% |
| ADI AP 70N² | <<locked>> | 60% | 22,539 psi | 51% | 1099 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 22,553 psi | 51% | 935 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 21,176 psi | 48% | 945 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 19,899 psi | 45% | 965 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 20,363 psi | 46% | 1010 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 16,288 psi | 37% | 968 fps | 99.9% |
| Alliant BULLSEYE² | <<locked>> | 60% | 20,784 psi | 47% | 1089 fps | 98.1% |
| Alliant Green Dot² | <<locked>> | 60% | 18,463 psi | 42% | 978 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 11,356 psi | 26% | 853 fps | 88.6% |
| Alliant POWER PISTOL* | <<locked>> | 80% | 26,107 psi | 59% | 1247 fps | 87% |
| Alliant RED DOT² | <<locked>> | 60% | 18,289 psi | 41% | 955 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 23,235 psi | 53% | 1138 fps | 98.6% |
| Alliant UNIQUE*² | <<locked>> | 60% | 15,345 psi | 35% | 971 fps | 93.7% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 17,796 psi | 40% | 961 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 10,747 psi | 24% | 820 fps | 99.5% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 18,826 psi | 43% | 1014 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 17,550 psi | 40% | 886 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 31,821 psi | 72% | 1207 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 21,422 psi | 48% | 1115 fps | 89.3% |
| Hodgdon Longshot*² | <<locked>> | 60% | 23,540 psi | 53% | 1158 fps | 93% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 5,903 psi | 13% | 604 fps | 96.1% |
| Hodgdon Universal² | <<locked>> | 60% | 18,579 psi | 42% | 1024 fps | 99.9% |
| Lovex D036*² | <<locked>> | 60% | 25,817 psi | 58% | 1207 fps | 90% |
| Lovex S011² | <<locked>> | 60% | 24,323 psi | 55% | 1086 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 17,941 psi | 41% | 1020 fps | 97.8% |
| Maxam CSB 1² | <<locked>> | 60% | 14,953 psi | 34% | 928 fps | 98.5% |
| Maxam CSB 2² | <<locked>> | 60% | 15,171 psi | 34% | 965 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 17,506 psi | 40% | 974 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 18,913 psi | 43% | 984 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 21,045 psi | 48% | 984 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 21,930 psi | 50% | 1119 fps | 96.4% |
| Ramshot True Blue*² | <<locked>> | 60% | 24,787 psi | 56% | 1178 fps | 93.8% |
| Ramshot Zip² | <<locked>> | 60% | 30,603 psi | 69% | 1198 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 20,262 psi | 46% | 1053 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,714 psi | 13% | 600 fps | 91.1% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 13,634 psi | 31% | 948 fps | 94.3% |
| Rottweil P 801² | <<locked>> | 60% | 23,670 psi | 54% | 1073 fps | 100% |
| Rottweil P 806* | <<locked>> | 80% | 16,911 psi | 38% | 1115 fps | 85.4% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 25,817 psi | 58% | 1207 fps | 90% |
| SNPE Vectan A0*² | <<locked>> | 60% | 14,881 psi | 34% | 925 fps | 93% |
| SNPE Vectan A1² | <<locked>> | 60% | 19,131 psi | 43% | 1007 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 18,362 psi | 42% | 1001 fps | 98.9% |
| SNPE Vectan BA10² | <<locked>> | 60% | 24,105 psi | 54% | 991 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 72% | 17,666 psi | 40% | 1020 fps | 87.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 17,985 psi | 41% | 1004 fps | 99.5% |
| SNPE Vectan SP 2*² | <<locked>> | 72% | 21,350 psi | 48% | 1178 fps | 85.7% |
| Somchem MP200*² | <<locked>> | 60% | 18,246 psi | 41% | 1033 fps | 94.9% |
| Somchem MS200² | <<locked>> | 60% | 16,694 psi | 38% | 984 fps | 95.9% |
| Somchem S221*² | <<locked>> | 72% | 27,920 psi | 63% | 1253 fps | 85.1% |
| Vihtavuori 3N37*² | <<locked>> | 64% | 15,185 psi | 34% | 984 fps | 85.8% |
| Vihtavuori N310² | <<locked>> | 60% | 29,907 psi | 68% | 1073 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 19,029 psi | 43% | 1004 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 9,413 psi | 21% | 741 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 17,143 psi | 39% | 1014 fps | 99.9% |
| Vihtavuori N340*² | <<locked>> | 60% | 15,447 psi | 35% | 961 fps | 94.2% |
| Vihtavuori N350*² | <<locked>> | 68% | 15,113 psi | 34% | 981 fps | 86.2% |
| Winchester 231² | <<locked>> | 60% | 24,831 psi | 56% | 1115 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 34,360 psi | 78% | 1234 fps | 100% |
| Winchester 572² | <<locked>> | 60% | 30,632 psi | 69% | 1286 fps | 95.9% |
| Winchester AutoComp ² | <<locked>> | 60% | 14,939 psi | 34% | 942 fps | 97.5% |
* 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 44 powders for .357 SIG loaded with the .355 | 124gr | Speer TMJ. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,476 fps; across all powders the maximum-charge window runs from 820 fps to 1,476 fps. Alliant Herco gives the best case fill at 100 %, and 44 of the 44 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 TrailBoss 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. As outliers, Alliant POWER PISTOL burn incompletely and react more sensitively to barrel length and temperature. ADI APS 350, ADI APS 450, 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.