Load Specifications
Bullet:.356 | 123gr | LOS FP
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 FP 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% | 37,086 psi | 84% | 1286 fps | 99.7% |
| Accurate No. 2 | <<locked>> | 80% | 37,130 psi | 84% | 1335 fps | 100% |
| Accurate No. 5² | <<locked>> | 72% | 39,001 psi | 88% | 1391 fps | 95.4% |
| Accurate No. 5² | <<locked>> | 68% | 39,146 psi | 88% | 1444 fps | 96.8% |
| Accurate Solo 1000 | <<locked>> | 88% | 38,174 psi | 86% | 1220 fps | 100% |
| Accurate Solo 1000 | <<locked>> | 84% | 38,392 psi | 87% | 1263 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 36,608 psi | 83% | 1263 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 88% | 37,333 psi | 84% | 1312 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 28,297 psi | 64% | 1230 fps | 88.6% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 32,184 psi | 73% | 1339 fps | 92.4% |
| ADI AP 70N | <<locked>> | 80% | 39,914 psi | 90% | 1316 fps | 100% |
| ADI AP 70N² | <<locked>> | 72% | 36,274 psi | 82% | 1312 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 38,841 psi | 88% | 1115 fps | 100% |
| ADI APS 350 | <<locked>> | 80% | 38,638 psi | 87% | 1155 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 39,827 psi | 90% | 1161 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 39,871 psi | 90% | 1204 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 38,638 psi | 87% | 1194 fps | 100% |
| ADI AS 30 | <<locked>> | 84% | 38,101 psi | 86% | 1227 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 38,638 psi | 87% | 1243 fps | 100% |
| ADI AS 50N | <<locked>> | 80% | 37,724 psi | 85% | 1270 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 39,276 psi | 89% | 1283 fps | 100% |
| Alliant BE-86 | <<locked>> | 88% | 39,581 psi | 89% | 1325 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 39,334 psi | 89% | 1362 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 80% | 39,813 psi | 90% | 1411 fps | 100% |
| Alliant Green Dot | <<locked>> | 88% | 38,058 psi | 86% | 1240 fps | 100% |
| Alliant Green Dot | <<locked>> | 84% | 38,290 psi | 87% | 1283 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 31,198 psi | 71% | 1257 fps | 99.9% |
| Alliant Hercoᴾ | <<locked>> | 100% | 34,301 psi | 78% | 1339 fps | 100% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 39,523 psi | 89% | 1440 fps | 93.1% |
| Alliant POWER PISTOL* | <<locked>> | 88% | 37,695 psi | 85% | 1467 fps | 94% |
| Alliant RED DOT | <<locked>> | 92% | 39,131 psi | 88% | 1224 fps | 100% |
| Alliant RED DOT | <<locked>> | 88% | 39,871 psi | 90% | 1270 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 36,419 psi | 82% | 1325 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 72% | 36,985 psi | 84% | 1375 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 39,856 psi | 90% | 1375 fps | 100% |
| Alliant UNIQUE | <<locked>> | 88% | 37,724 psi | 85% | 1388 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 38,479 psi | 87% | 1227 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 84% | 38,043 psi | 86% | 1263 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 30,603 psi | 69% | 1165 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 34,577 psi | 78% | 1243 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 38,856 psi | 88% | 1260 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 80% | 38,856 psi | 88% | 1296 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 38,653 psi | 87% | 1306 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 64% | 38,377 psi | 87% | 1342 fps | 100% |
| Hodgdon Clays | <<locked>> | 96% | 37,971 psi | 86% | 1142 fps | 100% |
| Hodgdon Clays | <<locked>> | 92% | 38,130 psi | 86% | 1181 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 36,637 psi | 83% | 1247 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 39,407 psi | 89% | 1319 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 36,753 psi | 83% | 1345 fps | 96.5% |
| Hodgdon HS-6² | <<locked>> | 72% | 36,782 psi | 83% | 1398 fps | 97.6% |
| Hodgdon Longshot² | <<locked>> | 72% | 35,998 psi | 81% | 1335 fps | 97.7% |
| Hodgdon Longshot² | <<locked>> | 68% | 36,390 psi | 82% | 1388 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 14,257 psi | 32% | 846 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 15,824 psi | 36% | 902 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 39,914 psi | 90% | 1316 fps | 100% |
| Hodgdon Universal | <<locked>> | 80% | 37,333 psi | 84% | 1325 fps | 100% |
| Lovex D036² | <<locked>> | 72% | 39,102 psi | 88% | 1391 fps | 95.4% |
| Lovex D036² | <<locked>> | 68% | 39,073 psi | 88% | 1444 fps | 96.7% |
| Lovex S011² | <<locked>> | 76% | 37,724 psi | 85% | 1243 fps | 100% |
| Lovex S011² | <<locked>> | 72% | 37,507 psi | 85% | 1283 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 37,391 psi | 85% | 1302 fps | 100% |
| Lovex S020 | <<locked>> | 80% | 37,637 psi | 85% | 1345 fps | 100% |
| Maxam CSB 1 | <<locked>> | 96% | 36,651 psi | 83% | 1260 fps | 100% |
| Maxam CSB 1 | <<locked>> | 92% | 38,101 psi | 86% | 1316 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 39,929 psi | 90% | 1309 fps | 100% |
| Maxam CSB 2 | <<locked>> | 88% | 37,434 psi | 85% | 1316 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 38,566 psi | 87% | 1260 fps | 100% |
| Maxam CSB 3 | <<locked>> | 88% | 39,436 psi | 89% | 1309 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 37,579 psi | 85% | 1227 fps | 100% |
| Maxam CSB 4 | <<locked>> | 84% | 39,001 psi | 88% | 1280 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 39,363 psi | 89% | 1194 fps | 100% |
| Maxam CSB 5 | <<locked>> | 80% | 38,841 psi | 88% | 1227 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 36,071 psi | 82% | 1322 fps | 99.8% |
| Ramshot Silhouette² | <<locked>> | 72% | 36,318 psi | 82% | 1368 fps | 100% |
| Ramshot True Blue² | <<locked>> | 72% | 37,681 psi | 85% | 1352 fps | 98.1% |
| Ramshot True Blue² | <<locked>> | 68% | 37,956 psi | 86% | 1404 fps | 99% |
| Ramshot Zip² | <<locked>> | 64% | 35,433 psi | 80% | 1240 fps | 100% |
| Ramshot Zip² | <<locked>> | 64% | 39,160 psi | 89% | 1322 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 37,565 psi | 85% | 1263 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 76% | 37,985 psi | 86% | 1302 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 13,416 psi | 30% | 850 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 14,881 psi | 34% | 909 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 36,941 psi | 84% | 1345 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 92% | 38,899 psi | 88% | 1401 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 92% | 38,580 psi | 87% | 1467 fps | 88.2% |
| Rottweil P 801² | <<locked>> | 76% | 38,290 psi | 87% | 1237 fps | 100% |
| Rottweil P 801² | <<locked>> | 72% | 38,479 psi | 87% | 1273 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 33,315 psi | 75% | 1407 fps | 96.1% |
| Rottweil P 806 | <<locked>> | 96% | 36,158 psi | 82% | 1483 fps | 97.9% |
| Shooters World Auto Pistol² | <<locked>> | 72% | 39,102 psi | 88% | 1391 fps | 95.4% |
| Shooters World Auto Pistol² | <<locked>> | 68% | 39,073 psi | 88% | 1444 fps | 96.7% |
| SNPE Vectan A0 | <<locked>> | 96% | 36,854 psi | 83% | 1289 fps | 100% |
| SNPE Vectan A0 | <<locked>> | 92% | 37,449 psi | 85% | 1342 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 39,972 psi | 90% | 1283 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 80% | 36,390 psi | 82% | 1283 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 38,783 psi | 88% | 1286 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 84% | 39,189 psi | 89% | 1332 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 38,435 psi | 87% | 1148 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 76% | 37,565 psi | 85% | 1178 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 35,563 psi | 80% | 1312 fps | 97% |
| SNPE Vectan BA7 1/2 | <<locked>> | 96% | 36,492 psi | 82% | 1375 fps | 98.3% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 36,970 psi | 84% | 1276 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 84% | 37,318 psi | 84% | 1319 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 88% | 35,868 psi | 81% | 1407 fps | 93.8% |
| SNPE Vectan SP 2 | <<locked>> | 84% | 37,478 psi | 85% | 1476 fps | 95.7% |
| Somchem MP200 | <<locked>> | 88% | 39,697 psi | 90% | 1358 fps | 100% |
| Somchem MP200 | <<locked>> | 84% | 39,972 psi | 90% | 1407 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 38,812 psi | 88% | 1325 fps | 100% |
| Somchem MS200 | <<locked>> | 88% | 39,682 psi | 90% | 1378 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 36,956 psi | 84% | 1368 fps | 89.1% |
| Somchem S221*² | <<locked>> | 76% | 37,768 psi | 85% | 1430 fps | 91.3% |
| Vihtavuori 3N37 | <<locked>> | 96% | 38,827 psi | 88% | 1381 fps | 98.6% |
| Vihtavuori 3N37 | <<locked>> | 92% | 40,030 psi | 90% | 1444 fps | 99.5% |
| Vihtavuori N310² | <<locked>> | 68% | 37,536 psi | 85% | 1142 fps | 100% |
| Vihtavuori N310² | <<locked>> | 64% | 36,579 psi | 83% | 1168 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 37,753 psi | 85% | 1237 fps | 100% |
| Vihtavuori N320 | <<locked>> | 80% | 38,145 psi | 86% | 1276 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 25,019 psi | 57% | 1020 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 27,630 psi | 62% | 1079 fps | 100% |
| Vihtavuori N330 | <<locked>> | 84% | 36,216 psi | 82% | 1283 fps | 100% |
| Vihtavuori N330 | <<locked>> | 80% | 37,043 psi | 84% | 1325 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 38,783 psi | 88% | 1325 fps | 100% |
| Vihtavuori N340 | <<locked>> | 88% | 39,581 psi | 89% | 1378 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 36,303 psi | 82% | 1345 fps | 98.3% |
| Vihtavuori N350 | <<locked>> | 96% | 37,898 psi | 86% | 1411 fps | 99.3% |
| Winchester 231² | <<locked>> | 72% | 36,550 psi | 83% | 1253 fps | 100% |
| Winchester 231² | <<locked>> | 68% | 36,100 psi | 82% | 1286 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 39,552 psi | 89% | 1273 fps | 100% |
| Winchester 572² | <<locked>> | 64% | 35,578 psi | 80% | 1339 fps | 97.1% |
| Winchester 572² | <<locked>> | 64% | 40,001 psi | 90% | 1447 fps | 99% |
| Winchester AutoComp | <<locked>> | 96% | 39,494 psi | 89% | 1312 fps | 100% |
| Winchester AutoComp | <<locked>> | 88% | 36,593 psi | 83% | 1319 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% | 18,115 psi | 41% | 984 fps | 92.9% |
| Accurate No. 2² | <<locked>> | 60% | 20,842 psi | 47% | 1079 fps | 96.2% |
| Accurate No. 5*² | <<locked>> | 60% | 26,789 psi | 61% | 1207 fps | 89.9% |
| Accurate No. 5*² | <<locked>> | 60% | 29,675 psi | 67% | 1302 fps | 93.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 19,943 psi | 45% | 971 fps | 100% |
| Accurate Solo 1000² | <<locked>> | 60% | 22,046 psi | 50% | 1040 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 16,563 psi | 37% | 948 fps | 98.9% |
| Accurate Solo 1250² | <<locked>> | 60% | 18,304 psi | 41% | 1017 fps | 99.9% |
| ADI AP 100* | <<locked>> | 92% | 23,757 psi | 54% | 1145 fps | 85.5% |
| ADI AP 100* | <<locked>> | 84% | 22,539 psi | 51% | 1161 fps | 86.4% |
| ADI AP 70N² | <<locked>> | 60% | 24,207 psi | 55% | 1106 fps | 100% |
| ADI AP 70N² | <<locked>> | 60% | 26,295 psi | 59% | 1171 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 22,611 psi | 51% | 922 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 24,439 psi | 55% | 978 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 21,408 psi | 48% | 935 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 23,685 psi | 54% | 1001 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 20,755 psi | 47% | 958 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 22,336 psi | 50% | 1014 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 21,379 psi | 48% | 1007 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 23,453 psi | 53% | 1073 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 17,042 psi | 39% | 961 fps | 99.9% |
| Alliant BE-86² | <<locked>> | 60% | 19,377 psi | 44% | 1037 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 60% | 20,827 psi | 47% | 1070 fps | 97.8% |
| Alliant BULLSEYE² | <<locked>> | 60% | 23,888 psi | 54% | 1165 fps | 99.5% |
| Alliant Green Dot² | <<locked>> | 60% | 20,291 psi | 46% | 991 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 21,567 psi | 49% | 1043 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 12,821 psi | 29% | 869 fps | 90.3% |
| Alliant Herco*² | <<locked>> | 60% | 14,373 psi | 32% | 942 fps | 93.6% |
| Alliant POWER PISTOL* | <<locked>> | 80% | 26,411 psi | 60% | 1230 fps | 86.4% |
| Alliant POWER PISTOL*² | <<locked>> | 72% | 24,468 psi | 55% | 1234 fps | 86.8% |
| Alliant RED DOT² | <<locked>> | 60% | 20,059 psi | 45% | 965 fps | 100% |
| Alliant RED DOT² | <<locked>> | 60% | 21,843 psi | 49% | 1024 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 23,395 psi | 53% | 1122 fps | 98.3% |
| Alliant Sport Pistol² | <<locked>> | 60% | 26,092 psi | 59% | 1211 fps | 99.6% |
| Alliant UNIQUE*² | 5 gr | 60% | 16,766 psi | 38% | 981 fps | 94.5% |
| Alliant UNIQUE² | 5 gr | 60% | 18,826 psi | 43% | 1063 fps | 97.1% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 18,782 psi | 42% | 958 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 20,552 psi | 46% | 1024 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 12,575 psi | 28% | 846 fps | 99.9% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 13,909 psi | 31% | 902 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 19,841 psi | 45% | 1010 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 22,452 psi | 51% | 1083 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 30,240 psi | 68% | 1204 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 33,649 psi | 76% | 1283 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 17,869 psi | 40% | 873 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 19,479 psi | 44% | 928 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 32,097 psi | 73% | 1194 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 35,244 psi | 80% | 1270 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 22,437 psi | 51% | 1115 fps | 89.4% |
| Hodgdon HS-6*² | <<locked>> | 60% | 25,309 psi | 57% | 1211 fps | 93% |
| Hodgdon Longshot*² | <<locked>> | 60% | 24,613 psi | 56% | 1158 fps | 93% |
| Hodgdon Longshot² | <<locked>> | 60% | 27,586 psi | 62% | 1253 fps | 96% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,513 psi | 17% | 627 fps | 98.6% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,108 psi | 18% | 669 fps | 99.7% |
| Hodgdon Universal² | <<locked>> | 60% | 20,131 psi | 46% | 1027 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 22,452 psi | 51% | 1102 fps | 100% |
| Lovex D036*² | <<locked>> | 60% | 26,731 psi | 60% | 1204 fps | 89.9% |
| Lovex D036*² | <<locked>> | 60% | 29,617 psi | 67% | 1299 fps | 93.1% |
| Lovex S011² | <<locked>> | 60% | 24,134 psi | 55% | 1070 fps | 100% |
| Lovex S011² | <<locked>> | 60% | 27,325 psi | 62% | 1152 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 19,305 psi | 44% | 1027 fps | 98.1% |
| Lovex S020² | <<locked>> | 60% | 21,408 psi | 48% | 1102 fps | 99.5% |
| Maxam CSB 1² | <<locked>> | 60% | 16,070 psi | 36% | 932 fps | 98.8% |
| Maxam CSB 1² | <<locked>> | 60% | 17,695 psi | 40% | 997 fps | 99.8% |
| Maxam CSB 2² | <<locked>> | 60% | 16,723 psi | 38% | 971 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 18,739 psi | 42% | 1037 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 18,434 psi | 42% | 971 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 20,363 psi | 46% | 1037 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 19,667 psi | 44% | 981 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 21,828 psi | 49% | 1047 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 22,684 psi | 51% | 991 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 24,236 psi | 55% | 1043 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 22,597 psi | 51% | 1112 fps | 96.3% |
| Ramshot Silhouette² | <<locked>> | 60% | 25,730 psi | 58% | 1207 fps | 98.6% |
| Ramshot True Blue*² | <<locked>> | 60% | 25,802 psi | 58% | 1175 fps | 93.8% |
| Ramshot True Blue² | <<locked>> | 60% | 28,805 psi | 65% | 1266 fps | 96.5% |
| Ramshot Zip² | <<locked>> | 60% | 31,038 psi | 70% | 1188 fps | 100% |
| Ramshot Zip² | <<locked>> | 60% | 35,041 psi | 79% | 1273 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 22,017 psi | 50% | 1060 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 24,801 psi | 56% | 1129 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,440 psi | 17% | 633 fps | 95.2% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,977 psi | 18% | 676 fps | 97.2% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 14,837 psi | 34% | 958 fps | 95.1% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 16,636 psi | 38% | 1033 fps | 97.6% |
| ReloadSwiss RS 24* | <<locked>> | 88% | 34,345 psi | 78% | 1404 fps | 86.2% |
| Rottweil P 801² | <<locked>> | 60% | 25,396 psi | 57% | 1079 fps | 100% |
| Rottweil P 801² | <<locked>> | 60% | 28,732 psi | 65% | 1152 fps | 100% |
| Rottweil P 806* | <<locked>> | 80% | 18,188 psi | 41% | 1125 fps | 86.3% |
| Rottweil P 806*² | <<locked>> | 72% | 17,506 psi | 40% | 1132 fps | 87% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 26,731 psi | 60% | 1204 fps | 89.9% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 29,617 psi | 67% | 1299 fps | 93.1% |
| SNPE Vectan A0*² | <<locked>> | 60% | 15,867 psi | 36% | 928 fps | 93.5% |
| SNPE Vectan A0² | <<locked>> | 60% | 17,666 psi | 40% | 1004 fps | 96.2% |
| SNPE Vectan A1² | <<locked>> | 60% | 19,435 psi | 44% | 994 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 21,857 psi | 49% | 1070 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 18,594 psi | 42% | 984 fps | 98.7% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 20,987 psi | 47% | 1066 fps | 99.8% |
| SNPE Vectan BA10² | <<locked>> | 60% | 24,381 psi | 55% | 981 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 26,353 psi | 60% | 1040 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 68% | 16,940 psi | 38% | 978 fps | 85.7% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 15,026 psi | 34% | 958 fps | 85.2% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 18,434 psi | 42% | 991 fps | 99.4% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 20,595 psi | 47% | 1066 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 72% | 22,829 psi | 52% | 1188 fps | 86.2% |
| SNPE Vectan SP 2*² | <<locked>> | 64% | 21,118 psi | 48% | 1181 fps | 86.3% |
| Somchem MP200*² | 5.7 gr | 60% | 18,971 psi | 43% | 1024 fps | 94.9% |
| Somchem MP200² | 5.7 gr | 60% | 21,219 psi | 48% | 1109 fps | 97.4% |
| Somchem MS200² | <<locked>> | 60% | 17,854 psi | 40% | 988 fps | 96.3% |
| Somchem MS200² | <<locked>> | 60% | 19,798 psi | 45% | 1063 fps | 98.4% |
| Somchem S221*² | <<locked>> | 76% | 33,185 psi | 75% | 1316 fps | 87.3% |
| Somchem S221*² | <<locked>> | 68% | 29,414 psi | 66% | 1299 fps | 87.1% |
| Vihtavuori 3N37*² | 6.1 gr | 64% | 16,694 psi | 38% | 1001 fps | 87% |
| Vihtavuori 3N37*² | 6.1 gr | 60% | 16,853 psi | 38% | 1033 fps | 88.8% |
| Vihtavuori N310² | <<locked>> | 60% | 30,705 psi | 69% | 1066 fps | 100% |
| Vihtavuori N310² | <<locked>> | 60% | 33,040 psi | 75% | 1129 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 20,102 psi | 45% | 1001 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 22,249 psi | 50% | 1063 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 11,298 psi | 26% | 761 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,763 psi | 29% | 817 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 18,376 psi | 42% | 1017 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 20,827 psi | 47% | 1089 fps | 100% |
| Vihtavuori N340*² | <<locked>> | 60% | 16,723 psi | 38% | 968 fps | 94.9% |
| Vihtavuori N340² | <<locked>> | 60% | 18,594 psi | 42% | 1043 fps | 97.3% |
| Vihtavuori N350*² | <<locked>> | 68% | 15,983 psi | 36% | 981 fps | 86.6% |
| Vihtavuori N350*² | <<locked>> | 60% | 14,750 psi | 33% | 978 fps | 86.8% |
| Winchester 231² | <<locked>> | 60% | 26,034 psi | 59% | 1115 fps | 100% |
| Winchester 231² | <<locked>> | 60% | 28,616 psi | 65% | 1188 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 34,679 psi | 78% | 1220 fps | 100% |
| Winchester 572² | <<locked>> | 60% | 31,531 psi | 71% | 1280 fps | 95.7% |
| Winchester 572² | <<locked>> | 60% | 35,186 psi | 80% | 1378 fps | 98% |
| Winchester AutoComp ² | <<locked>> | 60% | 16,433 psi | 37% | 951 fps | 98.1% |
| Winchester AutoComp ² | <<locked>> | 60% | 18,565 psi | 42% | 1030 fps | 99.6% |
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 FP. Rottweil P 806 delivers the highest muzzle velocity at 1,483 fps; across all powders the maximum-charge window runs from 846 fps to 1,483 fps. ADI AP 100 gives the best case fill at 100 %, and 95 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 FP 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.