Load Specifications
Load data in caliber .357 SIG with .355 | 115gr | Geco FMJ 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 BULLSEYE, Somchem MP200 and Alliant UNIQUE.
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% | 37,275 psi | 84% | 1335 fps | 99.3% |
| Accurate No. 5*² | <<locked>> | 76% | 39,784 psi | 90% | 1450 fps | 94.4% |
| Accurate Solo 1000 | <<locked>> | 92% | 38,493 psi | 87% | 1276 fps | 100% |
| Accurate Solo 1250ᴾ | <<locked>> | 100% | 38,870 psi | 88% | 1342 fps | 100% |
| ADI AP 70N | <<locked>> | 84% | 38,609 psi | 87% | 1362 fps | 100% |
| ADI APS 350 | <<locked>> | 88% | 39,740 psi | 90% | 1171 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 37,898 psi | 86% | 1188 fps | 100% |
| ADI AS 30 | <<locked>> | 96% | 39,697 psi | 90% | 1260 fps | 100% |
| ADI AS 50N | <<locked>> | 88% | 36,680 psi | 83% | 1276 fps | 100% |
| Alliant BE-86 | <<locked>> | 96% | 37,333 psi | 84% | 1319 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 88% | 39,160 psi | 89% | 1414 fps | 100% |
| Alliant Green Dot | <<locked>> | 96% | 40,030 psi | 90% | 1319 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 26,136 psi | 59% | 1234 fps | 98.6% |
| Alliant POWER PISTOL*ᴾ | <<locked>> | 100% | 38,711 psi | 88% | 1480 fps | 91.4% |
| Alliant RED DOT | <<locked>> | 96% | 38,566 psi | 87% | 1273 fps | 100% |
| Alliant Sport Pistol | <<locked>> | 80% | 37,405 psi | 85% | 1391 fps | 100% |
| Alliant UNIQUEᴾ | <<locked>> | 100% | 37,463 psi | 85% | 1404 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 92% | 36,825 psi | 83% | 1266 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 26,542 psi | 60% | 1168 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 88% | 38,218 psi | 86% | 1309 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 72% | 37,797 psi | 85% | 1352 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 37,246 psi | 84% | 1158 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 36,260 psi | 82% | 1296 fps | 100% |
| Hodgdon HS-6 | <<locked>> | 80% | 37,057 psi | 84% | 1398 fps | 95.3% |
| Hodgdon Longshot² | <<locked>> | 76% | 36,245 psi | 82% | 1388 fps | 96.7% |
| Hodgdon TiteGroup² | <<locked>> | 64% | 37,942 psi | 86% | 1263 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 11,458 psi | 26% | 833 fps | 100% |
| Hodgdon Universal | <<locked>> | 92% | 38,609 psi | 87% | 1362 fps | 100% |
| Lovex D036*² | <<locked>> | 76% | 39,784 psi | 90% | 1450 fps | 94.3% |
| Lovex S011 | <<locked>> | 80% | 37,913 psi | 86% | 1296 fps | 100% |
| Lovex S020 | <<locked>> | 88% | 36,564 psi | 83% | 1348 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 36,027 psi | 81% | 1309 fps | 100% |
| Maxam CSB 2ᴾ | <<locked>> | 100% | 36,970 psi | 84% | 1339 fps | 100% |
| Maxam CSB 3 | <<locked>> | 96% | 38,159 psi | 86% | 1309 fps | 100% |
| Maxam CSB 4 | <<locked>> | 92% | 37,420 psi | 85% | 1280 fps | 100% |
| Maxam CSB 5 | <<locked>> | 88% | 39,378 psi | 89% | 1247 fps | 100% |
| Ramshot Silhouette | <<locked>> | 84% | 39,958 psi | 90% | 1424 fps | 99.8% |
| Ramshot True Blue² | <<locked>> | 76% | 38,174 psi | 86% | 1407 fps | 97.3% |
| Ramshot Zip² | <<locked>> | 72% | 39,900 psi | 90% | 1345 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 88% | 38,232 psi | 86% | 1335 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 9,950 psi | 22% | 807 fps | 97.5% |
| ReloadSwiss RS 20ᴾ | <<locked>> | 100% | 35,882 psi | 81% | 1388 fps | 100% |
| Rottweil P 801 | <<locked>> | 80% | 36,796 psi | 83% | 1283 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 26,731 psi | 60% | 1358 fps | 91.6% |
| Shooters World Auto Pistol*² | <<locked>> | 76% | 39,784 psi | 90% | 1450 fps | 94.3% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 36,463 psi | 82% | 1335 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 92% | 39,987 psi | 90% | 1335 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 92% | 38,682 psi | 87% | 1335 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 84% | 39,262 psi | 89% | 1204 fps | 100% |
| SNPE Vectan BA7 1/2*ᴾ | <<locked>> | 100% | 31,879 psi | 72% | 1309 fps | 94.5% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 36,303 psi | 82% | 1322 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 96% | 38,493 psi | 87% | 1499 fps | 93.4% |
| Somchem MP200 | <<locked>> | 92% | 38,928 psi | 88% | 1404 fps | 99.9% |
| Somchem MS200 | <<locked>> | 96% | 36,999 psi | 84% | 1358 fps | 100% |
| Vihtavuori 3N37ᴾ | <<locked>> | 100% | 38,058 psi | 86% | 1424 fps | 97.6% |
| Vihtavuori N310² | <<locked>> | 72% | 37,420 psi | 85% | 1191 fps | 100% |
| Vihtavuori N320 | <<locked>> | 88% | 37,144 psi | 84% | 1286 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 20,711 psi | 47% | 1017 fps | 100% |
| Vihtavuori N330 | <<locked>> | 92% | 39,392 psi | 89% | 1371 fps | 100% |
| Vihtavuori N340 | <<locked>> | 96% | 36,985 psi | 84% | 1358 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 32,097 psi | 73% | 1339 fps | 96% |
| Winchester 231 | <<locked>> | 80% | 39,900 psi | 90% | 1345 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 35,404 psi | 80% | 1283 fps | 100% |
| Winchester 572² | <<locked>> | 68% | 35,853 psi | 81% | 1391 fps | 96.1% |
| Winchester AutoComp ᴾ | <<locked>> | 100% | 38,580 psi | 87% | 1358 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% | 15,853 psi | 36% | 971 fps | 89.1% |
| Accurate No. 5*² | <<locked>> | 60% | 23,438 psi | 53% | 1184 fps | 85.8% |
| Accurate Solo 1000² | <<locked>> | 60% | 17,680 psi | 40% | 978 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 14,040 psi | 32% | 935 fps | 96.5% |
| ADI AP 70N² | <<locked>> | 60% | 19,986 psi | 45% | 1086 fps | 99.8% |
| ADI APS 350² | <<locked>> | 60% | 20,523 psi | 46% | 932 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 19,450 psi | 44% | 948 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 17,985 psi | 41% | 965 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 18,536 psi | 42% | 1010 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 14,301 psi | 32% | 948 fps | 98.6% |
| Alliant BULLSEYE² | 4.2 gr | 60% | 18,391 psi | 42% | 1063 fps | 95.3% |
| Alliant Green Dot² | <<locked>> | 60% | 16,708 psi | 38% | 971 fps | 100% |
| Alliant Herco*² | <<locked>> | 64% | 11,153 psi | 25% | 869 fps | 86% |
| Alliant POWER PISTOL* | <<locked>> | 88% | 28,485 psi | 64% | 1319 fps | 86.1% |
| Alliant RED DOT² | <<locked>> | 60% | 17,172 psi | 39% | 965 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 20,929 psi | 47% | 1122 fps | 96.2% |
| Alliant UNIQUE*² | 4.1 gr | 60% | 13,909 psi | 31% | 958 fps | 90.1% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 16,157 psi | 37% | 958 fps | 99.9% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 9,544 psi | 22% | 810 fps | 97.6% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 16,491 psi | 37% | 997 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 26,121 psi | 59% | 1198 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 20,682 psi | 47% | 948 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 28,195 psi | 64% | 1194 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 64% | 21,901 psi | 50% | 1148 fps | 87.3% |
| Hodgdon Longshot*² | <<locked>> | 60% | 21,103 psi | 48% | 1135 fps | 89% |
| Hodgdon TiteGroup² | <<locked>> | 60% | 34,069 psi | 77% | 1220 fps | 100% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 5,294 psi | 12% | 591 fps | 92.8% |
| Hodgdon Universal² | <<locked>> | 60% | 16,911 psi | 38% | 1017 fps | 98.8% |
| Lovex D036*² | <<locked>> | 60% | 23,395 psi | 53% | 1188 fps | 85.8% |
| Lovex S011² | <<locked>> | 60% | 21,814 psi | 49% | 1076 fps | 100% |
| Lovex S020*² | <<locked>> | 60% | 15,650 psi | 35% | 997 fps | 94.6% |
| Maxam CSB 1² | <<locked>> | 60% | 13,503 psi | 31% | 915 fps | 96.1% |
| Maxam CSB 2² | <<locked>> | 60% | 13,329 psi | 30% | 951 fps | 99.5% |
| Maxam CSB 3² | <<locked>> | 60% | 15,853 psi | 36% | 968 fps | 99.8% |
| Maxam CSB 4² | <<locked>> | 60% | 17,071 psi | 39% | 981 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 19,972 psi | 45% | 997 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 19,290 psi | 44% | 1089 fps | 92.8% |
| Ramshot True Blue*² | <<locked>> | 60% | 22,379 psi | 51% | 1155 fps | 90% |
| Ramshot Zip² | <<locked>> | 60% | 27,151 psi | 61% | 1184 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 18,115 psi | 41% | 1053 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,134 psi | 12% | 587 fps | 86.9% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 12,343 psi | 28% | 932 fps | 90.3% |
| Rottweil P 801² | <<locked>> | 60% | 21,683 psi | 49% | 1083 fps | 100% |
| Rottweil P 806* | <<locked>> | 92% | 20,160 psi | 46% | 1230 fps | 86.6% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 23,395 psi | 53% | 1188 fps | 85.8% |
| SNPE Vectan A0*² | <<locked>> | 60% | 13,692 psi | 31% | 915 fps | 89.5% |
| SNPE Vectan A1² | <<locked>> | 60% | 17,143 psi | 39% | 994 fps | 99.3% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 16,433 psi | 37% | 981 fps | 96.6% |
| SNPE Vectan BA10² | <<locked>> | 60% | 22,423 psi | 51% | 997 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 80% | 19,189 psi | 43% | 1079 fps | 86.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 15,824 psi | 36% | 981 fps | 97.5% |
| SNPE Vectan SP 2* | <<locked>> | 80% | 23,656 psi | 53% | 1257 fps | 85.2% |
| Somchem MP200*² | 4.7 gr | 60% | 16,288 psi | 37% | 1010 fps | 91.1% |
| Somchem MS200*² | <<locked>> | 60% | 14,721 psi | 33% | 955 fps | 92.2% |
| Vihtavuori 3N37*² | <<locked>> | 72% | 17,506 psi | 40% | 1070 fps | 86.1% |
| Vihtavuori N310² | <<locked>> | 60% | 27,557 psi | 62% | 1083 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 17,056 psi | 39% | 1001 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 8,499 psi | 19% | 741 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 15,389 psi | 35% | 1004 fps | 98.7% |
| Vihtavuori N340*² | <<locked>> | 60% | 14,112 psi | 32% | 951 fps | 90.8% |
| Vihtavuori N350*² | <<locked>> | 76% | 16,926 psi | 38% | 1050 fps | 85.8% |
| Winchester 231² | <<locked>> | 60% | 22,423 psi | 51% | 1109 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 30,719 psi | 69% | 1227 fps | 100% |
| Winchester 572*² | <<locked>> | 60% | 26,658 psi | 60% | 1250 fps | 92% |
| Winchester AutoComp ² | <<locked>> | 60% | 13,735 psi | 31% | 935 fps | 95.1% |
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 | 115gr | Geco FMJ. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,499 fps; across all powders the maximum-charge window runs from 807 fps to 1,499 fps. Accurate Solo 1250 gives the best case fill at 100 %, and 53 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 22–90 %, leaving at least 10 % headroom. Accurate Solo 1250, Alliant Herco, Alliant POWER 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. Alliant BULLSEYE, Somchem MP200, Alliant UNIQUE rank at the top here: for .357 SIG with the .355 | 115gr | Geco FMJ 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.