Load Specifications
Bullet:.356 | 123gr | LOS RN
Bullet Manufacturer:LOS
Bullet Weight:123 gr
Bullet Diameter:0.356"
Bullet Length:<<locked>>
Caliber:.357 SIG load data
Case Length (l3):0.86"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:19.5 Grains of Water
Primer Size:Small Pistol (SP)
Barrel Length:4.5"
Max. allowed Pressure:44,236 psi
Load data in caliber .357 SIG with .356 | 123gr | LOS RN bullet and 132 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.
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>> | 84% | 35,839 psi | 81% | 1263 fps | 99.5% |
| Accurate No. 2 | <<locked>> | 84% | 36,506 psi | 83% | 1276 fps | 99.6% |
| Accurate No. 5² | <<locked>> | 72% | 38,508 psi | 87% | 1375 fps | 95% |
| Accurate No. 5² | <<locked>> | 72% | 38,885 psi | 88% | 1385 fps | 95.3% |
| Accurate Solo 1000 | <<locked>> | 88% | 38,261 psi | 86% | 1217 fps | 100% |
| Accurate Solo 1000 | <<locked>> | 88% | 38,957 psi | 88% | 1227 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 96% | 39,450 psi | 89% | 1286 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 36,027 psi | 81% | 1253 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 27,804 psi | 63% | 1214 fps | 88% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 28,123 psi | 64% | 1224 fps | 88.4% |
| ADI AP 70N² | <<locked>> | 76% | 36,347 psi | 82% | 1270 fps | 100% |
| ADI AP 70N | <<locked>> | 80% | 39,407 psi | 89% | 1306 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 38,711 psi | 88% | 1109 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 38,116 psi | 86% | 1106 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 39,856 psi | 90% | 1155 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 39,175 psi | 89% | 1152 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 37,318 psi | 84% | 1175 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 37,985 psi | 86% | 1184 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 37,391 psi | 85% | 1224 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 38,087 psi | 86% | 1234 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 38,406 psi | 87% | 1266 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 38,928 psi | 88% | 1276 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 38,159 psi | 86% | 1339 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 38,783 psi | 88% | 1348 fps | 100% |
| Alliant Green Dot | <<locked>> | 88% | 36,782 psi | 83% | 1220 fps | 100% |
| Alliant Green Dot | <<locked>> | 88% | 37,463 psi | 85% | 1230 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 30,429 psi | 69% | 1240 fps | 99.8% |
| Alliant Hercoᴾ | <<locked>> | 100% | 30,893 psi | 70% | 1250 fps | 99.9% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 38,972 psi | 88% | 1424 fps | 92.7% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 39,247 psi | 89% | 1434 fps | 93% |
| Alliant RED DOT | <<locked>> | 92% | 39,015 psi | 88% | 1217 fps | 100% |
| Alliant RED DOT | <<locked>> | 92% | 38,464 psi | 87% | 1214 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 36,579 psi | 83% | 1322 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 37,159 psi | 84% | 1332 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 38,928 psi | 88% | 1358 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 39,436 psi | 89% | 1368 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 92% | 39,958 psi | 90% | 1237 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 37,898 psi | 86% | 1220 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 29,805 psi | 67% | 1148 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 30,327 psi | 69% | 1158 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 38,377 psi | 87% | 1250 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 38,754 psi | 88% | 1257 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 37,797 psi | 85% | 1289 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 38,276 psi | 87% | 1299 fps | 100% |
| Hodgdon Clays | <<locked>> | 96% | 38,072 psi | 86% | 1135 fps | 100% |
| Hodgdon Clays | <<locked>> | 96% | 37,449 psi | 85% | 1132 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 35,563 psi | 80% | 1227 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 39,914 psi | 90% | 1280 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 36,245 psi | 82% | 1332 fps | 96.1% |
| Hodgdon HS-6² | <<locked>> | 76% | 36,492 psi | 82% | 1339 fps | 96.2% |
| Hodgdon Longshot² | <<locked>> | 76% | 39,914 psi | 90% | 1378 fps | 98.4% |
| Hodgdon Longshot² | <<locked>> | 72% | 35,853 psi | 81% | 1332 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 13,982 psi | 32% | 837 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 13,837 psi | 31% | 833 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 38,812 psi | 88% | 1299 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 39,407 psi | 89% | 1306 fps | 100% |
| Lovex D036² | <<locked>> | 72% | 38,522 psi | 87% | 1375 fps | 95% |
| Lovex D036² | <<locked>> | 72% | 38,812 psi | 88% | 1385 fps | 95.2% |
| Lovex S011² | <<locked>> | 76% | 37,913 psi | 86% | 1240 fps | 100% |
| Lovex S011² | <<locked>> | 76% | 38,493 psi | 87% | 1250 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 36,289 psi | 82% | 1283 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 36,941 psi | 84% | 1293 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 39,247 psi | 89% | 1283 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 39,885 psi | 90% | 1289 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 38,827 psi | 88% | 1289 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 39,523 psi | 89% | 1299 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 37,391 psi | 85% | 1240 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 38,014 psi | 86% | 1250 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 37,681 psi | 85% | 1220 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 38,319 psi | 87% | 1234 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 39,334 psi | 89% | 1188 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 38,595 psi | 87% | 1184 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 39,885 psi | 90% | 1362 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 35,708 psi | 81% | 1312 fps | 99.8% |
| Ramshot True Blue² | <<locked>> | 72% | 37,173 psi | 84% | 1339 fps | 97.8% |
| Ramshot True Blue² | <<locked>> | 72% | 37,478 psi | 85% | 1345 fps | 98% |
| Ramshot Zip² | <<locked>> | 68% | 39,218 psi | 89% | 1276 fps | 100% |
| Ramshot Zip² | <<locked>> | 68% | 39,726 psi | 90% | 1283 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 36,376 psi | 82% | 1247 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 37,014 psi | 84% | 1257 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 13,184 psi | 30% | 840 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 13,053 psi | 30% | 837 fps | 99.9% |
| ReloadSwiss RS 20ᴾ | <<locked>> | 100% | 39,740 psi | 90% | 1368 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 36,376 psi | 82% | 1335 fps | 100% |
| Rottweil P 801² | <<locked>> | 76% | 38,421 psi | 87% | 1230 fps | 100% |
| Rottweil P 801² | <<locked>> | 76% | 37,826 psi | 86% | 1227 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 32,169 psi | 73% | 1385 fps | 95.4% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 33,141 psi | 75% | 1401 fps | 95.9% |
| Shooters World Auto Pistol² | <<locked>> | 72% | 38,522 psi | 87% | 1375 fps | 95% |
| Shooters World Auto Pistol² | <<locked>> | 72% | 38,812 psi | 88% | 1385 fps | 95.2% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 39,407 psi | 89% | 1312 fps | 100% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 39,900 psi | 90% | 1322 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 39,146 psi | 88% | 1266 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 39,682 psi | 90% | 1276 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 37,884 psi | 86% | 1270 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 38,406 psi | 87% | 1276 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 38,479 psi | 87% | 1142 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 37,884 psi | 86% | 1138 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 35,012 psi | 79% | 1299 fps | 96.6% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 35,288 psi | 80% | 1306 fps | 96.8% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 39,537 psi | 89% | 1296 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 36,521 psi | 83% | 1266 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 92% | 39,711 psi | 90% | 1453 fps | 94.9% |
| SNPE Vectan SP 2* | <<locked>> | 88% | 35,505 psi | 80% | 1401 fps | 93.5% |
| Somchem MP200 | <<locked>> | 88% | 38,856 psi | 88% | 1342 fps | 100% |
| Somchem MP200 | <<locked>> | 88% | 39,363 psi | 89% | 1352 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 37,942 psi | 86% | 1309 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 38,392 psi | 87% | 1316 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 36,564 psi | 83% | 1355 fps | 88.6% |
| Somchem S221* | <<locked>> | 80% | 36,825 psi | 83% | 1362 fps | 88.9% |
| Vihtavuori 3N37 | <<locked>> | 96% | 38,334 psi | 87% | 1368 fps | 98.3% |
| Vihtavuori 3N37 | <<locked>> | 96% | 38,624 psi | 87% | 1375 fps | 98.5% |
| Vihtavuori N310² | <<locked>> | 68% | 37,304 psi | 84% | 1132 fps | 100% |
| Vihtavuori N310² | <<locked>> | 68% | 38,218 psi | 86% | 1145 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 36,419 psi | 82% | 1217 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 37,144 psi | 84% | 1227 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 24,889 psi | 56% | 1014 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 24,526 psi | 55% | 1010 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 39,059 psi | 88% | 1306 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 39,711 psi | 90% | 1316 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 37,942 psi | 86% | 1309 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 38,450 psi | 87% | 1319 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 35,650 psi | 81% | 1329 fps | 98% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 36,027 psi | 81% | 1339 fps | 98.1% |
| Winchester 231² | <<locked>> | 76% | 39,218 psi | 89% | 1276 fps | 100% |
| Winchester 231² | <<locked>> | 76% | 39,726 psi | 90% | 1283 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 38,450 psi | 87% | 1257 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 39,073 psi | 88% | 1266 fps | 100% |
| Winchester 572² | <<locked>> | 64% | 34,824 psi | 79% | 1319 fps | 96.6% |
| Winchester 572² | <<locked>> | 68% | 39,885 psi | 90% | 1388 fps | 98% |
| Winchester AutoComp | <<locked>> | 96% | 38,812 psi | 88% | 1299 fps | 100% |
| Winchester AutoComp | <<locked>> | 96% | 39,204 psi | 89% | 1306 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% | 17,941 psi | 41% | 974 fps | 92.5% |
| Accurate No. 2*² | <<locked>> | 60% | 18,478 psi | 42% | 988 fps | 93.1% |
| Accurate No. 5*² | <<locked>> | 60% | 26,150 psi | 59% | 1188 fps | 89.2% |
| Accurate No. 5*² | <<locked>> | 60% | 26,498 psi | 60% | 1198 fps | 89.6% |
| Accurate Solo 1000² | <<locked>> | 60% | 19,638 psi | 44% | 961 fps | 100% |
| Accurate Solo 1000² | <<locked>> | 60% | 20,247 psi | 46% | 974 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 16,302 psi | 37% | 938 fps | 98.7% |
| Accurate Solo 1250² | <<locked>> | 60% | 16,810 psi | 38% | 951 fps | 99% |
| ADI AP 100* | <<locked>> | 92% | 23,888 psi | 54% | 1142 fps | 85.2% |
| ADI AP 100* | <<locked>> | 92% | 23,511 psi | 53% | 1138 fps | 85.1% |
| ADI AP 70N² | <<locked>> | 60% | 23,148 psi | 52% | 1083 fps | 100% |
| ADI AP 70N² | <<locked>> | 60% | 23,714 psi | 54% | 1093 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 23,293 psi | 53% | 925 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 22,960 psi | 52% | 922 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 21,132 psi | 48% | 925 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 21,799 psi | 49% | 938 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 20,421 psi | 46% | 948 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 20,131 psi | 46% | 945 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 21,132 psi | 48% | 997 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 21,698 psi | 49% | 1010 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 16,853 psi | 38% | 951 fps | 99.9% |
| Alliant BE-86² | <<locked>> | 60% | 17,303 psi | 39% | 965 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 60% | 20,639 psi | 47% | 1060 fps | 97.5% |
| Alliant BULLSEYE² | <<locked>> | 60% | 21,176 psi | 48% | 1073 fps | 97.9% |
| Alliant Green Dot² | <<locked>> | 60% | 20,001 psi | 45% | 981 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 19,740 psi | 45% | 978 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 12,691 psi | 29% | 860 fps | 89.9% |
| Alliant Herco*² | <<locked>> | 60% | 13,010 psi | 29% | 873 fps | 90.4% |
| Alliant POWER PISTOL* | <<locked>> | 80% | 25,715 psi | 58% | 1214 fps | 85.7% |
| Alliant POWER PISTOL* | <<locked>> | 80% | 26,121 psi | 59% | 1224 fps | 86.1% |
| Alliant RED DOT² | <<locked>> | 60% | 19,696 psi | 45% | 951 fps | 100% |
| Alliant RED DOT² | <<locked>> | 60% | 19,421 psi | 44% | 948 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 23,308 psi | 53% | 1115 fps | 98.1% |
| Alliant Sport Pistol² | <<locked>> | 60% | 23,786 psi | 54% | 1129 fps | 98.4% |
| Alliant UNIQUE*² | 4.2 gr | 60% | 16,549 psi | 37% | 971 fps | 94.1% |
| Alliant UNIQUE*² | 4.2 gr | 60% | 17,013 psi | 38% | 984 fps | 94.6% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 18,536 psi | 42% | 951 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 19,102 psi | 43% | 965 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 11,864 psi | 27% | 823 fps | 99.7% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 12,241 psi | 28% | 833 fps | 99.9% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 19,189 psi | 43% | 994 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 19,522 psi | 44% | 1004 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 29,356 psi | 66% | 1184 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 29,936 psi | 68% | 1194 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 18,391 psi | 42% | 879 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 18,130 psi | 41% | 876 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 30,980 psi | 70% | 1175 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 31,604 psi | 71% | 1184 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 21,886 psi | 49% | 1096 fps | 88.7% |
| Hodgdon HS-6*² | <<locked>> | 60% | 22,191 psi | 50% | 1106 fps | 89% |
| Hodgdon Longshot*² | <<locked>> | 60% | 23,931 psi | 54% | 1138 fps | 92.3% |
| Hodgdon Longshot*² | <<locked>> | 60% | 24,294 psi | 55% | 1148 fps | 92.7% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,281 psi | 16% | 614 fps | 98.3% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,556 psi | 17% | 630 fps | 98.6% |
| Hodgdon Universal² | <<locked>> | 60% | 19,827 psi | 45% | 1017 fps | 99.9% |
| Hodgdon Universal² | <<locked>> | 60% | 20,392 psi | 46% | 1033 fps | 100% |
| Lovex D036*² | <<locked>> | 60% | 26,107 psi | 59% | 1188 fps | 89.2% |
| Lovex D036*² | <<locked>> | 60% | 26,455 psi | 60% | 1198 fps | 89.6% |
| Lovex S011² | <<locked>> | 60% | 23,989 psi | 54% | 1060 fps | 100% |
| Lovex S011² | <<locked>> | 60% | 24,540 psi | 55% | 1073 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 18,391 psi | 42% | 1004 fps | 97.5% |
| Lovex S020² | <<locked>> | 60% | 18,855 psi | 43% | 1014 fps | 97.8% |
| Maxam CSB 1² | <<locked>> | 60% | 15,824 psi | 36% | 922 fps | 98.5% |
| Maxam CSB 1² | <<locked>> | 60% | 15,650 psi | 35% | 919 fps | 98.5% |
| Maxam CSB 2² | <<locked>> | 60% | 16,404 psi | 37% | 961 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 16,201 psi | 37% | 958 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 18,188 psi | 41% | 961 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 17,956 psi | 41% | 958 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 19,377 psi | 44% | 971 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 19,972 psi | 45% | 984 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 22,307 psi | 50% | 981 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 21,973 psi | 50% | 978 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 21,901 psi | 50% | 1093 fps | 95.7% |
| Ramshot Silhouette² | <<locked>> | 60% | 22,307 psi | 50% | 1102 fps | 96.1% |
| Ramshot True Blue*² | <<locked>> | 60% | 25,135 psi | 57% | 1155 fps | 93.1% |
| Ramshot True Blue*² | <<locked>> | 60% | 25,498 psi | 58% | 1165 fps | 93.4% |
| Ramshot Zip² | <<locked>> | 60% | 30,995 psi | 70% | 1181 fps | 100% |
| Ramshot Zip² | <<locked>> | 60% | 30,487 psi | 69% | 1175 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 21,698 psi | 49% | 1050 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 21,451 psi | 48% | 1047 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 7,223 psi | 16% | 620 fps | 94.6% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 7,194 psi | 16% | 620 fps | 94.7% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 14,634 psi | 33% | 948 fps | 94.7% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 14,460 psi | 33% | 945 fps | 94.6% |
| Rottweil P 801² | <<locked>> | 60% | 25,222 psi | 57% | 1070 fps | 100% |
| Rottweil P 801² | <<locked>> | 60% | 24,845 psi | 56% | 1066 fps | 100% |
| Rottweil P 806* | <<locked>> | 80% | 17,753 psi | 40% | 1112 fps | 85.5% |
| Rottweil P 806* | <<locked>> | 80% | 17,912 psi | 40% | 1119 fps | 85.9% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 26,107 psi | 59% | 1188 fps | 89.2% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 26,455 psi | 60% | 1198 fps | 89.6% |
| SNPE Vectan A0*² | <<locked>> | 60% | 15,722 psi | 36% | 919 fps | 93.1% |
| SNPE Vectan A0*² | <<locked>> | 60% | 15,505 psi | 35% | 915 fps | 93% |
| SNPE Vectan A1² | <<locked>> | 60% | 19,305 psi | 44% | 988 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 19,740 psi | 45% | 997 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 18,478 psi | 42% | 978 fps | 98.5% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 18,898 psi | 43% | 988 fps | 98.7% |
| SNPE Vectan BA10² | <<locked>> | 60% | 24,120 psi | 55% | 971 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 23,772 psi | 54% | 968 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 72% | 18,043 psi | 41% | 997 fps | 86.6% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 68% | 16,679 psi | 38% | 968 fps | 85.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 18,231 psi | 41% | 981 fps | 99.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 18,753 psi | 42% | 994 fps | 99.5% |
| SNPE Vectan SP 2*² | <<locked>> | 72% | 22,162 psi | 50% | 1168 fps | 85.4% |
| SNPE Vectan SP 2*² | <<locked>> | 72% | 22,466 psi | 51% | 1178 fps | 85.8% |
| Somchem MP200*² | 4.8 gr | 60% | 18,826 psi | 43% | 1017 fps | 94.6% |
| Somchem MP200² | 4.8 gr | 60% | 19,247 psi | 44% | 1030 fps | 95% |
| Somchem MS200² | <<locked>> | 60% | 17,695 psi | 40% | 978 fps | 96% |
| Somchem MS200² | <<locked>> | 60% | 17,448 psi | 39% | 974 fps | 95.9% |
| Somchem S221*² | <<locked>> | 76% | 31,981 psi | 72% | 1289 fps | 86.4% |
| Somchem S221*² | <<locked>> | 76% | 32,198 psi | 73% | 1296 fps | 86.6% |
| Vihtavuori 3N37*² | 5.4 gr | 64% | 16,085 psi | 36% | 978 fps | 85.9% |
| Vihtavuori 3N37*² | 5.4 gr | 64% | 16,389 psi | 37% | 991 fps | 86.5% |
| Vihtavuori N310² | <<locked>> | 60% | 30,400 psi | 69% | 1056 fps | 100% |
| Vihtavuori N310² | <<locked>> | 60% | 29,892 psi | 68% | 1056 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 19,798 psi | 45% | 991 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 20,436 psi | 46% | 1004 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 11,037 psi | 25% | 751 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 11,414 psi | 26% | 764 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 18,173 psi | 41% | 1010 fps | 99.9% |
| Vihtavuori N330² | <<locked>> | 60% | 18,710 psi | 42% | 1020 fps | 100% |
| Vihtavuori N340*² | <<locked>> | 60% | 16,549 psi | 37% | 958 fps | 94.5% |
| Vihtavuori N340*² | <<locked>> | 60% | 16,969 psi | 38% | 971 fps | 94.9% |
| Vihtavuori N350*² | <<locked>> | 68% | 15,925 psi | 36% | 974 fps | 86.2% |
| Vihtavuori N350*² | <<locked>> | 68% | 16,244 psi | 37% | 984 fps | 86.8% |
| Winchester 231² | <<locked>> | 60% | 25,034 psi | 57% | 1096 fps | 100% |
| Winchester 231² | <<locked>> | 60% | 25,541 psi | 58% | 1106 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 33,663 psi | 76% | 1204 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 34,200 psi | 77% | 1214 fps | 100% |
| Winchester 572² | <<locked>> | 60% | 30,821 psi | 70% | 1260 fps | 95.2% |
| Winchester 572² | <<locked>> | 60% | 31,169 psi | 70% | 1270 fps | 95.4% |
| Winchester AutoComp ² | <<locked>> | 60% | 16,317 psi | 37% | 945 fps | 98% |
| Winchester AutoComp ² | <<locked>> | 60% | 16,694 psi | 38% | 958 fps | 98.2% |
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 132 powders for .357 SIG loaded with the .356 | 123gr | LOS RN. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,453 fps; across all powders the maximum-charge window runs from 833 fps to 1,453 fps. ADI AP 100 gives the best case fill at 100 %, and 98 of the 132 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 30–90 %, leaving at least 10 % headroom. ADI AP 100, ADI AP 100, Alliant Herco 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 .356 | 123gr | LOS RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AP 100, ADI AP 100, Alliant POWER PISTOL burn incompletely and react more sensitively to barrel length and temperature. Accurate No. 2, Accurate No. 2, Accurate Solo 1000 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.