Load Specifications
Bullet:.356 | 123gr | LOS HP
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 HP bullet and 131 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant UNIQUE, Vihtavuori 3N37 and ReloadSwiss RS 20.
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% | 37,652 psi | 85% | 1302 fps | 99.8% |
| Accurate No. 2 | <<locked>> | 84% | 39,871 psi | 90% | 1355 fps | 100% |
| Accurate No. 5*² | <<locked>> | 68% | 35,984 psi | 81% | 1362 fps | 94.7% |
| Accurate No. 5² | <<locked>> | 68% | 37,753 psi | 85% | 1414 fps | 96% |
| Accurate Solo 1000 | <<locked>> | 88% | 39,030 psi | 88% | 1240 fps | 100% |
| Accurate Solo 1000 | <<locked>> | 84% | 38,145 psi | 86% | 1250 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 37,333 psi | 84% | 1280 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 39,537 psi | 89% | 1325 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 29,312 psi | 66% | 1257 fps | 89.6% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 31,749 psi | 72% | 1319 fps | 91.8% |
| ADI AP 70N² | <<locked>> | 76% | 36,985 psi | 84% | 1289 fps | 100% |
| ADI AP 70N² | <<locked>> | 76% | 39,392 psi | 89% | 1339 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 39,929 psi | 90% | 1135 fps | 100% |
| ADI APS 350 | <<locked>> | 80% | 36,927 psi | 83% | 1125 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 38,072 psi | 86% | 1152 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 38,493 psi | 87% | 1178 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 38,319 psi | 87% | 1201 fps | 100% |
| ADI AS 30 | <<locked>> | 84% | 37,826 psi | 86% | 1214 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 38,203 psi | 86% | 1247 fps | 100% |
| ADI AS 50N | <<locked>> | 80% | 37,536 psi | 85% | 1260 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 39,552 psi | 89% | 1293 fps | 100% |
| Alliant BE-86 | <<locked>> | 88% | 38,856 psi | 88% | 1309 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 39,943 psi | 90% | 1378 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 80% | 38,667 psi | 87% | 1385 fps | 100% |
| Alliant Green Dot | <<locked>> | 88% | 38,856 psi | 88% | 1257 fps | 100% |
| Alliant Green Dot | <<locked>> | 84% | 36,927 psi | 83% | 1257 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 31,488 psi | 71% | 1270 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 33,750 psi | 76% | 1322 fps | 100% |
| Alliant POWER PISTOL* | <<locked>> | 92% | 37,391 psi | 85% | 1421 fps | 92.7% |
| Alliant POWER PISTOL* | <<locked>> | 88% | 36,347 psi | 82% | 1434 fps | 93.1% |
| Alliant RED DOT | <<locked>> | 88% | 37,492 psi | 85% | 1214 fps | 100% |
| Alliant RED DOT | <<locked>> | 88% | 38,305 psi | 87% | 1240 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 38,203 psi | 86% | 1358 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 72% | 35,969 psi | 81% | 1352 fps | 100% |
| Alliant UNIQUE | <<locked>> | 92% | 36,927 psi | 83% | 1348 fps | 100% |
| Alliant UNIQUE | <<locked>> | 92% | 39,900 psi | 90% | 1407 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 39,189 psi | 89% | 1243 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 84% | 36,898 psi | 83% | 1243 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 31,082 psi | 70% | 1175 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 33,736 psi | 76% | 1224 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 40,001 psi | 90% | 1280 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 80% | 37,666 psi | 85% | 1276 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 39,044 psi | 88% | 1319 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 64% | 36,550 psi | 83% | 1312 fps | 100% |
| Hodgdon Clays | <<locked>> | 96% | 38,812 psi | 88% | 1158 fps | 100% |
| Hodgdon Clays | <<locked>> | 92% | 37,942 psi | 86% | 1171 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 37,347 psi | 84% | 1263 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 38,450 psi | 87% | 1296 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 37,797 psi | 85% | 1371 fps | 97% |
| Hodgdon HS-6² | <<locked>> | 72% | 35,505 psi | 80% | 1368 fps | 97% |
| Hodgdon Longshot² | <<locked>> | 72% | 37,202 psi | 84% | 1362 fps | 98.2% |
| Hodgdon Longshot² | <<locked>> | 72% | 39,827 psi | 90% | 1421 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 14,330 psi | 32% | 853 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 15,403 psi | 35% | 886 fps | 100% |
| Hodgdon Universal | <<locked>> | 84% | 36,985 psi | 84% | 1289 fps | 100% |
| Hodgdon Universal | <<locked>> | 84% | 39,392 psi | 89% | 1339 fps | 100% |
| Lovex D036*² | <<locked>> | 68% | 35,998 psi | 81% | 1362 fps | 94.7% |
| Lovex D036² | <<locked>> | 68% | 37,695 psi | 85% | 1411 fps | 96% |
| Lovex S011² | <<locked>> | 76% | 38,464 psi | 87% | 1263 fps | 100% |
| Lovex S011² | <<locked>> | 72% | 37,449 psi | 85% | 1273 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 37,913 psi | 86% | 1316 fps | 100% |
| Lovex S020 | <<locked>> | 80% | 36,593 psi | 83% | 1322 fps | 100% |
| Maxam CSB 1 | <<locked>> | 96% | 37,246 psi | 84% | 1276 fps | 100% |
| Maxam CSB 1 | <<locked>> | 92% | 37,101 psi | 84% | 1296 fps | 100% |
| Maxam CSB 2 | <<locked>> | 92% | 36,956 psi | 84% | 1283 fps | 100% |
| Maxam CSB 2 | <<locked>> | 88% | 36,216 psi | 82% | 1293 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 39,218 psi | 89% | 1273 fps | 100% |
| Maxam CSB 3 | <<locked>> | 88% | 38,276 psi | 87% | 1286 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 38,435 psi | 87% | 1243 fps | 100% |
| Maxam CSB 4 | <<locked>> | 84% | 37,681 psi | 85% | 1257 fps | 100% |
| Maxam CSB 5 | <<locked>> | 80% | 36,405 psi | 82% | 1171 fps | 100% |
| Maxam CSB 5 | <<locked>> | 80% | 38,479 psi | 87% | 1214 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 37,376 psi | 84% | 1348 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 39,610 psi | 90% | 1398 fps | 100% |
| Ramshot True Blue² | <<locked>> | 72% | 38,769 psi | 88% | 1375 fps | 98.5% |
| Ramshot True Blue² | <<locked>> | 68% | 36,535 psi | 83% | 1375 fps | 98.5% |
| Ramshot Zip² | <<locked>> | 64% | 35,998 psi | 81% | 1257 fps | 100% |
| Ramshot Zip² | <<locked>> | 64% | 38,203 psi | 86% | 1302 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 38,435 psi | 87% | 1280 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 40,016 psi | 90% | 1316 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 13,532 psi | 31% | 856 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 14,446 psi | 33% | 892 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 38,450 psi | 87% | 1368 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 92% | 38,014 psi | 86% | 1385 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 92% | 36,811 psi | 83% | 1427 fps | 86.9% |
| Rottweil P 801² | <<locked>> | 76% | 39,146 psi | 88% | 1250 fps | 100% |
| Rottweil P 801² | <<locked>> | 72% | 38,261 psi | 86% | 1263 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 34,722 psi | 78% | 1434 fps | 96.8% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 39,117 psi | 88% | 1509 fps | 98.4% |
| Shooters World Auto Pistol*² | <<locked>> | 68% | 35,998 psi | 81% | 1362 fps | 94.7% |
| Shooters World Auto Pistol² | <<locked>> | 68% | 37,695 psi | 85% | 1411 fps | 96% |
| SNPE Vectan A0 | <<locked>> | 96% | 38,247 psi | 86% | 1316 fps | 100% |
| SNPE Vectan A0 | <<locked>> | 96% | 39,813 psi | 90% | 1358 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 84% | 36,985 psi | 84% | 1260 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 84% | 38,551 psi | 87% | 1299 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 39,030 psi | 88% | 1299 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 84% | 37,420 psi | 85% | 1302 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 39,276 psi | 89% | 1165 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 76% | 37,333 psi | 84% | 1165 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 36,651 psi | 83% | 1339 fps | 97.5% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 39,059 psi | 88% | 1394 fps | 98.6% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 37,463 psi | 85% | 1289 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 84% | 36,289 psi | 82% | 1299 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 88% | 37,072 psi | 84% | 1434 fps | 94.5% |
| SNPE Vectan SP 2* | <<locked>> | 84% | 36,042 psi | 81% | 1444 fps | 94.9% |
| Somchem MP200 | <<locked>> | 88% | 40,001 psi | 90% | 1371 fps | 100% |
| Somchem MP200 | <<locked>> | 84% | 39,247 psi | 89% | 1385 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 39,262 psi | 89% | 1339 fps | 100% |
| Somchem MS200 | <<locked>> | 88% | 37,739 psi | 85% | 1345 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 38,682 psi | 87% | 1404 fps | 90.3% |
| Somchem S221*² | <<locked>> | 76% | 35,984 psi | 81% | 1394 fps | 90.1% |
| Vihtavuori 3N37 | <<locked>> | 96% | 40,030 psi | 90% | 1407 fps | 99% |
| Vihtavuori 3N37 | <<locked>> | 92% | 38,609 psi | 87% | 1414 fps | 99.1% |
| Vihtavuori N310² | <<locked>> | 68% | 38,754 psi | 88% | 1161 fps | 100% |
| Vihtavuori N310² | <<locked>> | 68% | 39,943 psi | 90% | 1191 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 38,682 psi | 87% | 1253 fps | 100% |
| Vihtavuori N320 | <<locked>> | 80% | 36,651 psi | 83% | 1250 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 25,773 psi | 58% | 1033 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 27,354 psi | 62% | 1070 fps | 100% |
| Vihtavuori N330 | <<locked>> | 84% | 36,927 psi | 83% | 1296 fps | 100% |
| Vihtavuori N330 | <<locked>> | 84% | 39,349 psi | 89% | 1342 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 39,334 psi | 89% | 1342 fps | 100% |
| Vihtavuori N340 | <<locked>> | 88% | 38,711 psi | 88% | 1358 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 37,608 psi | 85% | 1371 fps | 98.7% |
| Vihtavuori N350 | <<locked>> | 96% | 36,419 psi | 82% | 1381 fps | 98.9% |
| Winchester 231² | <<locked>> | 72% | 37,144 psi | 84% | 1266 fps | 100% |
| Winchester 231² | <<locked>> | 72% | 39,320 psi | 89% | 1312 fps | 100% |
| Winchester 572² | <<locked>> | 64% | 37,028 psi | 84% | 1368 fps | 97.7% |
| Winchester 572² | <<locked>> | 64% | 39,291 psi | 89% | 1424 fps | 98.7% |
| Winchester AutoComp | <<locked>> | 92% | 36,564 psi | 83% | 1289 fps | 100% |
| Winchester AutoComp | <<locked>> | 92% | 38,827 psi | 88% | 1335 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% | 18,884 psi | 43% | 1007 fps | 93.8% |
| Accurate No. 2² | <<locked>> | 60% | 19,740 psi | 45% | 1047 fps | 95.2% |
| Accurate No. 5*² | <<locked>> | 60% | 27,122 psi | 61% | 1220 fps | 90.5% |
| Accurate No. 5*² | <<locked>> | 60% | 29,080 psi | 66% | 1280 fps | 92.5% |
| Accurate Solo 1000² | <<locked>> | 60% | 20,958 psi | 47% | 997 fps | 100% |
| Accurate Solo 1000² | <<locked>> | 60% | 21,437 psi | 48% | 1020 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 17,347 psi | 39% | 974 fps | 99.4% |
| Accurate Solo 1250² | <<locked>> | 60% | 18,449 psi | 42% | 1014 fps | 99.8% |
| ADI AP 100* | <<locked>> | 92% | 24,700 psi | 56% | 1175 fps | 86.6% |
| ADI AP 100* | <<locked>> | 84% | 21,944 psi | 50% | 1138 fps | 85.4% |
| ADI AP 70N² | <<locked>> | 60% | 24,163 psi | 55% | 1112 fps | 100% |
| ADI AP 70N² | <<locked>> | 60% | 25,933 psi | 59% | 1155 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 23,917 psi | 54% | 945 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 24,627 psi | 56% | 971 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 21,567 psi | 49% | 942 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 23,018 psi | 52% | 981 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 20,929 psi | 47% | 968 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 21,596 psi | 49% | 994 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 22,394 psi | 51% | 1033 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 22,800 psi | 52% | 1056 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 17,622 psi | 40% | 978 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 18,449 psi | 42% | 1010 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 60% | 21,683 psi | 49% | 1096 fps | 98.3% |
| Alliant BULLSEYE² | <<locked>> | 60% | 22,626 psi | 51% | 1132 fps | 99% |
| Alliant Green Dot² | <<locked>> | 60% | 20,436 psi | 46% | 1001 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 21,727 psi | 49% | 1040 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 13,358 psi | 30% | 892 fps | 91.3% |
| Alliant Herco*² | <<locked>> | 60% | 14,069 psi | 32% | 925 fps | 92.9% |
| Alliant POWER PISTOL*² | <<locked>> | 76% | 24,468 psi | 55% | 1201 fps | 85.4% |
| Alliant POWER PISTOL*² | <<locked>> | 72% | 23,801 psi | 54% | 1211 fps | 85.8% |
| Alliant RED DOT² | <<locked>> | 60% | 20,247 psi | 46% | 974 fps | 100% |
| Alliant RED DOT² | <<locked>> | 60% | 21,045 psi | 48% | 1001 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 24,149 psi | 55% | 1145 fps | 98.7% |
| Alliant Sport Pistol² | <<locked>> | 60% | 25,715 psi | 58% | 1194 fps | 99.5% |
| Alliant UNIQUE² | 4.8 gr | 60% | 17,477 psi | 40% | 1007 fps | 95.4% |
| Alliant UNIQUE² | 4.8 gr | 60% | 18,362 psi | 42% | 1043 fps | 96.5% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 19,667 psi | 44% | 984 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 20,769 psi | 47% | 1020 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 12,662 psi | 29% | 853 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 13,518 psi | 31% | 886 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 20,262 psi | 46% | 1024 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 21,770 psi | 49% | 1063 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 30,821 psi | 70% | 1220 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 32,706 psi | 74% | 1263 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 18,927 psi | 43% | 896 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 19,537 psi | 44% | 922 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 32,822 psi | 74% | 1211 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 34,171 psi | 77% | 1247 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 22,814 psi | 52% | 1132 fps | 90% |
| Hodgdon HS-6*² | <<locked>> | 60% | 24,685 psi | 56% | 1191 fps | 92.2% |
| Hodgdon Longshot*² | <<locked>> | 60% | 24,947 psi | 56% | 1175 fps | 93.5% |
| Hodgdon Longshot² | <<locked>> | 60% | 27,064 psi | 61% | 1234 fps | 95.4% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,702 psi | 17% | 640 fps | 99% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,977 psi | 18% | 659 fps | 99.5% |
| Hodgdon Universal² | <<locked>> | 60% | 20,914 psi | 47% | 1050 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 22,017 psi | 50% | 1086 fps | 100% |
| Lovex D036*² | <<locked>> | 60% | 27,064 psi | 61% | 1220 fps | 90.4% |
| Lovex D036*² | <<locked>> | 60% | 29,037 psi | 66% | 1280 fps | 92.5% |
| Lovex S011² | <<locked>> | 60% | 25,019 psi | 57% | 1089 fps | 100% |
| Lovex S011² | <<locked>> | 60% | 26,890 psi | 61% | 1138 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 19,334 psi | 44% | 1033 fps | 98.3% |
| Lovex S020² | <<locked>> | 60% | 21,016 psi | 48% | 1086 fps | 99.3% |
| Maxam CSB 1² | <<locked>> | 60% | 16,128 psi | 36% | 938 fps | 99% |
| Maxam CSB 1² | <<locked>> | 60% | 17,172 psi | 39% | 978 fps | 99.6% |
| Maxam CSB 2² | <<locked>> | 60% | 16,839 psi | 38% | 978 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 18,130 psi | 41% | 1017 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 18,565 psi | 42% | 981 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 19,798 psi | 45% | 1017 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 19,812 psi | 45% | 988 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 21,147 psi | 48% | 1027 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 22,814 psi | 52% | 997 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 23,511 psi | 53% | 1024 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 23,134 psi | 52% | 1129 fps | 96.8% |
| Ramshot Silhouette² | <<locked>> | 60% | 24,889 psi | 56% | 1181 fps | 98.1% |
| Ramshot True Blue*² | <<locked>> | 60% | 26,150 psi | 59% | 1191 fps | 94.3% |
| Ramshot True Blue² | <<locked>> | 60% | 28,195 psi | 64% | 1247 fps | 95.9% |
| Ramshot Zip² | <<locked>> | 60% | 31,676 psi | 72% | 1204 fps | 100% |
| Ramshot Zip² | <<locked>> | 60% | 33,968 psi | 77% | 1250 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 22,960 psi | 52% | 1079 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 24,250 psi | 55% | 1112 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,324 psi | 17% | 630 fps | 95.3% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,861 psi | 18% | 666 fps | 96.8% |
| ReloadSwiss RS 20² | 5 gr | 60% | 15,432 psi | 35% | 978 fps | 95.9% |
| ReloadSwiss RS 20² | 5 gr | 60% | 16,230 psi | 37% | 1017 fps | 97.2% |
| ReloadSwiss RS 24* | <<locked>> | 88% | 33,315 psi | 75% | 1378 fps | 85.2% |
| Rottweil P 801² | <<locked>> | 60% | 26,310 psi | 59% | 1096 fps | 100% |
| Rottweil P 801² | <<locked>> | 60% | 27,354 psi | 62% | 1125 fps | 100% |
| Rottweil P 806*² | <<locked>> | 76% | 16,984 psi | 38% | 1102 fps | 85.3% |
| Rottweil P 806*² | <<locked>> | 72% | 16,636 psi | 38% | 1102 fps | 85.6% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 27,064 psi | 61% | 1220 fps | 90.4% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 29,037 psi | 66% | 1280 fps | 92.5% |
| SNPE Vectan A0*² | <<locked>> | 60% | 16,491 psi | 37% | 951 fps | 94.3% |
| SNPE Vectan A0² | <<locked>> | 60% | 17,274 psi | 39% | 988 fps | 95.7% |
| SNPE Vectan A1² | <<locked>> | 60% | 20,059 psi | 45% | 1014 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 21,553 psi | 49% | 1056 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 19,290 psi | 44% | 1007 fps | 99.1% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 20,668 psi | 47% | 1053 fps | 99.7% |
| SNPE Vectan BA10² | <<locked>> | 60% | 24,482 psi | 55% | 988 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 25,730 psi | 58% | 1024 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 68% | 17,361 psi | 39% | 994 fps | 86.6% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 64% | 16,201 psi | 37% | 984 fps | 86.2% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 19,160 psi | 43% | 1014 fps | 99.7% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 20,175 psi | 46% | 1050 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 72% | 23,221 psi | 52% | 1204 fps | 86.9% |
| SNPE Vectan SP 2*² | <<locked>> | 64% | 20,378 psi | 46% | 1155 fps | 85.3% |
| Somchem MP200² | <<locked>> | 60% | 19,595 psi | 44% | 1047 fps | 95.6% |
| Somchem MP200² | <<locked>> | 60% | 20,914 psi | 47% | 1093 fps | 97% |
| Somchem MS200² | <<locked>> | 60% | 17,883 psi | 40% | 994 fps | 96.6% |
| Somchem MS200² | <<locked>> | 60% | 19,377 psi | 44% | 1047 fps | 98% |
| Somchem S221*² | <<locked>> | 72% | 29,878 psi | 68% | 1273 fps | 85.9% |
| Somchem S221*² | <<locked>> | 68% | 28,398 psi | 64% | 1273 fps | 86% |
| Vihtavuori 3N37*² | 5.8 gr | 60% | 15,098 psi | 34% | 961 fps | 85.4% |
| Vihtavuori 3N37*² | 5.8 gr | 60% | 16,143 psi | 36% | 1007 fps | 87.6% |
| Vihtavuori N310² | <<locked>> | 60% | 30,705 psi | 69% | 1073 fps | 100% |
| Vihtavuori N310² | <<locked>> | 60% | 32,314 psi | 73% | 1109 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 21,132 psi | 48% | 1024 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 22,452 psi | 51% | 1063 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 11,516 psi | 26% | 771 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,198 psi | 28% | 797 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 19,247 psi | 44% | 1040 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 20,320 psi | 46% | 1076 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 17,405 psi | 39% | 991 fps | 95.6% |
| Vihtavuori N340² | <<locked>> | 60% | 18,202 psi | 41% | 1027 fps | 96.8% |
| Vihtavuori N350*² | <<locked>> | 64% | 14,866 psi | 34% | 958 fps | 85.6% |
| Vihtavuori N350*² | <<locked>> | 60% | 14,025 psi | 32% | 948 fps | 85.4% |
| Winchester 231² | <<locked>> | 60% | 25,875 psi | 58% | 1122 fps | 100% |
| Winchester 231² | <<locked>> | 60% | 27,441 psi | 62% | 1161 fps | 100% |
| Winchester 572² | <<locked>> | 60% | 31,894 psi | 72% | 1296 fps | 96.1% |
| Winchester 572² | <<locked>> | 60% | 34,447 psi | 78% | 1358 fps | 97.6% |
| Winchester AutoComp ² | <<locked>> | 60% | 17,013 psi | 38% | 971 fps | 98.6% |
| Winchester AutoComp ² | <<locked>> | 60% | 17,709 psi | 40% | 1004 fps | 99.2% |
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 131 powders for .357 SIG loaded with the .356 | 123gr | LOS HP. Rottweil P 806 delivers the highest muzzle velocity at 1,509 fps; across all powders the maximum-charge window runs from 853 fps to 1,509 fps. ADI AP 100 gives the best case fill at 100 %, and 95 of the 131 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 31–90 %, 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. Alliant UNIQUE, Vihtavuori 3N37, ReloadSwiss RS 20 rank at the top here: for .357 SIG with the .356 | 123gr | LOS HP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 5, ADI AP 100, ADI AP 100 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.