Load Specifications
Load data in caliber .357 SIG with .355 | 124gr | Nosler Assured Stopping Power bullet and 66 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 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.
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Max Load - Barrel Length: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2 | <<locked>> | 84% | 35,926 psi | 81% | 1283 fps | 99.7% |
| Accurate No. 5² | <<locked>> | 72% | 38,580 psi | 87% | 1398 fps | 95.6% |
| Accurate Solo 1000 | <<locked>> | 88% | 37,434 psi | 85% | 1220 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 96% | 39,218 psi | 89% | 1299 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 27,630 psi | 62% | 1230 fps | 88.6% |
| ADI AP 70N | <<locked>> | 80% | 37,956 psi | 86% | 1306 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 38,377 psi | 87% | 1119 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 39,247 psi | 89% | 1161 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 37,347 psi | 84% | 1194 fps | 100% |
| ADI AS 50N | <<locked>> | 88% | 39,711 psi | 90% | 1266 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 37,565 psi | 85% | 1273 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 38,247 psi | 86% | 1355 fps | 100% |
| Alliant Green Dot | <<locked>> | 92% | 39,102 psi | 88% | 1263 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 29,167 psi | 66% | 1240 fps | 99.8% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 38,870 psi | 88% | 1444 fps | 93.3% |
| Alliant RED DOT | <<locked>> | 92% | 37,797 psi | 85% | 1220 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 36,506 psi | 83% | 1335 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 37,985 psi | 86% | 1365 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 92% | 39,856 psi | 90% | 1250 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 29,022 psi | 66% | 1155 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 37,144 psi | 84% | 1250 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 36,970 psi | 84% | 1296 fps | 100% |
| Hodgdon Claysᴾ | <<locked>> | 100% | 39,943 psi | 90% | 1168 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 39,044 psi | 88% | 1283 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 35,998 psi | 81% | 1345 fps | 96.5% |
| Hodgdon Longshot² | <<locked>> | 76% | 39,682 psi | 90% | 1391 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 12,662 psi | 29% | 833 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 37,956 psi | 86% | 1306 fps | 100% |
| Lovex D036² | <<locked>> | 72% | 38,508 psi | 87% | 1394 fps | 95.6% |
| Lovex S011² | <<locked>> | 76% | 36,883 psi | 83% | 1243 fps | 100% |
| Lovex S020 | <<locked>> | 88% | 39,740 psi | 90% | 1335 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 38,885 psi | 88% | 1293 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 37,927 psi | 86% | 1299 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 37,347 psi | 84% | 1253 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 36,535 psi | 83% | 1227 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 38,392 psi | 87% | 1194 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 38,972 psi | 88% | 1368 fps | 100% |
| Ramshot True Blue² | <<locked>> | 72% | 36,027 psi | 81% | 1342 fps | 97.9% |
| Ramshot Zip² | <<locked>> | 68% | 38,856 psi | 88% | 1286 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 84% | 39,233 psi | 89% | 1296 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 11,052 psi | 25% | 814 fps | 99.2% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 36,506 psi | 83% | 1348 fps | 100% |
| Rottweil P 801² | <<locked>> | 76% | 36,303 psi | 82% | 1227 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 31,111 psi | 70% | 1385 fps | 95.5% |
| Shooters World Auto Pistol² | <<locked>> | 72% | 38,508 psi | 87% | 1394 fps | 95.6% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 38,972 psi | 88% | 1322 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 38,754 psi | 88% | 1276 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 37,608 psi | 85% | 1280 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 37,898 psi | 86% | 1148 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 34,896 psi | 79% | 1316 fps | 97% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 39,059 psi | 88% | 1306 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 92% | 39,073 psi | 88% | 1463 fps | 95.3% |
| Somchem MP200 | <<locked>> | 88% | 37,971 psi | 86% | 1348 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 37,246 psi | 84% | 1316 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 35,389 psi | 80% | 1362 fps | 88.9% |
| Vihtavuori 3N37 | <<locked>> | 96% | 38,189 psi | 86% | 1385 fps | 98.6% |
| Vihtavuori N310² | <<locked>> | 68% | 36,564 psi | 83% | 1138 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 36,434 psi | 82% | 1234 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 23,250 psi | 53% | 1010 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 38,667 psi | 87% | 1316 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 37,275 psi | 84% | 1319 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 35,752 psi | 81% | 1348 fps | 98.4% |
| Winchester 231² | <<locked>> | 76% | 38,856 psi | 88% | 1286 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 38,261 psi | 86% | 1270 fps | 100% |
| Winchester 572² | <<locked>> | 68% | 39,595 psi | 90% | 1401 fps | 98.3% |
| Winchester AutoComp | <<locked>> | 96% | 37,623 psi | 85% | 1302 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% | 17,056 psi | 39% | 974 fps | 92.3% |
| Accurate No. 5*² | <<locked>> | 60% | 25,353 psi | 57% | 1191 fps | 89.4% |
| Accurate Solo 1000² | <<locked>> | 60% | 19,160 psi | 43% | 971 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 15,389 psi | 35% | 938 fps | 98.6% |
| ADI AP 100* | <<locked>> | 92% | 22,945 psi | 52% | 1145 fps | 85.3% |
| ADI AP 70N² | <<locked>> | 60% | 22,423 psi | 51% | 1093 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 22,205 psi | 50% | 925 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 20,958 psi | 47% | 938 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 18,710 psi | 42% | 942 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 20,160 psi | 46% | 1004 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 15,548 psi | 35% | 945 fps | 99.7% |
| Alliant BULLSEYE² | <<locked>> | 60% | 19,856 psi | 45% | 1063 fps | 97.5% |
| Alliant Green Dot² | <<locked>> | 60% | 18,231 psi | 41% | 968 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 11,240 psi | 25% | 843 fps | 88.2% |
| Alliant POWER PISTOL* | <<locked>> | 80% | 25,570 psi | 58% | 1230 fps | 86.3% |
| Alliant RED DOT² | <<locked>> | 60% | 17,970 psi | 41% | 945 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 22,379 psi | 51% | 1115 fps | 98.1% |
| Alliant UNIQUE*² | 4.3 gr | 60% | 15,200 psi | 34% | 961 fps | 93.3% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 17,593 psi | 40% | 955 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 10,588 psi | 24% | 814 fps | 99.3% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 18,260 psi | 41% | 997 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 28,616 psi | 65% | 1194 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 17,260 psi | 39% | 876 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 30,893 psi | 70% | 1188 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 20,929 psi | 47% | 1099 fps | 88.6% |
| Hodgdon Longshot*² | <<locked>> | 60% | 23,032 psi | 52% | 1142 fps | 92.4% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,019 psi | 14% | 607 fps | 96.2% |
| Hodgdon Universal² | <<locked>> | 60% | 18,420 psi | 42% | 1014 fps | 99.8% |
| Lovex D036*² | <<locked>> | 60% | 25,309 psi | 57% | 1191 fps | 89.3% |
| Lovex S011² | <<locked>> | 60% | 23,279 psi | 53% | 1066 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 17,085 psi | 39% | 997 fps | 97.1% |
| Maxam CSB 1² | <<locked>> | 60% | 14,794 psi | 33% | 919 fps | 98.3% |
| Maxam CSB 2² | <<locked>> | 60% | 14,895 psi | 34% | 955 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 16,549 psi | 37% | 948 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 18,652 psi | 42% | 974 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 20,784 psi | 47% | 974 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 21,234 psi | 48% | 1099 fps | 95.9% |
| Ramshot True Blue*² | <<locked>> | 60% | 24,294 psi | 55% | 1161 fps | 93.2% |
| Ramshot Zip² | <<locked>> | 60% | 29,733 psi | 67% | 1181 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 20,030 psi | 45% | 1043 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,526 psi | 12% | 587 fps | 90.2% |
| ReloadSwiss RS 20*² | 4.5 gr | 60% | 13,503 psi | 31% | 938 fps | 93.9% |
| Rottweil P 801² | <<locked>> | 60% | 23,482 psi | 53% | 1066 fps | 100% |
| Rottweil P 806* | <<locked>> | 84% | 18,724 psi | 42% | 1158 fps | 87.3% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 25,309 psi | 57% | 1191 fps | 89.3% |
| SNPE Vectan A0*² | <<locked>> | 60% | 14,779 psi | 33% | 919 fps | 92.7% |
| SNPE Vectan A1² | <<locked>> | 60% | 18,391 psi | 42% | 988 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 17,579 psi | 40% | 978 fps | 98.4% |
| SNPE Vectan BA10² | <<locked>> | 60% | 22,902 psi | 52% | 968 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 72% | 17,187 psi | 39% | 1001 fps | 86.4% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 17,129 psi | 39% | 978 fps | 99.1% |
| SNPE Vectan SP 2*² | <<locked>> | 76% | 23,685 psi | 54% | 1220 fps | 87.4% |
| Somchem MP200*² | <<locked>> | 60% | 17,521 psi | 40% | 1010 fps | 94.1% |
| Somchem MS200² | <<locked>> | 60% | 16,592 psi | 38% | 974 fps | 95.7% |
| Somchem S221*² | <<locked>> | 76% | 30,879 psi | 70% | 1296 fps | 86.6% |
| Vihtavuori 3N37*² | 5.6 gr | 64% | 15,185 psi | 34% | 978 fps | 85.5% |
| Vihtavuori N310² | <<locked>> | 60% | 29,733 psi | 67% | 1066 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 18,797 psi | 42% | 994 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 9,137 psi | 21% | 732 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 16,984 psi | 38% | 1004 fps | 99.9% |
| Vihtavuori N340*² | <<locked>> | 60% | 15,316 psi | 35% | 951 fps | 93.9% |
| Vihtavuori N350*² | <<locked>> | 68% | 14,562 psi | 33% | 961 fps | 85.2% |
| Winchester 231² | <<locked>> | 60% | 24,816 psi | 56% | 1109 fps | 100% |
| Winchester 244² | <<locked>> | 60% | 33,460 psi | 76% | 1217 fps | 100% |
| Winchester 572² | <<locked>> | 60% | 30,008 psi | 68% | 1266 fps | 95.4% |
| Winchester AutoComp ² | <<locked>> | 60% | 14,866 psi | 34% | 935 fps | 97.4% |
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 66 powders for .357 SIG loaded with the .355 | 124gr | Nosler Assured Stopping Power. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,463 fps; across all powders the maximum-charge window runs from 814 fps to 1,463 fps. ADI AP 100 gives the best case fill at 100 %, and 50 of the 66 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. ADI AP 100, Alliant Herco, Baschieri & Pellagri 102 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. Vihtavuori 3N37, Alliant UNIQUE, ReloadSwiss RS 20 rank at the top here: for .357 SIG with the .355 | 124gr | Nosler Assured Stopping Power they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AP 100, Alliant POWER PISTOL, Somchem S221 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.