Load Specifications
Load data in caliber .357 Mag. with .355 | 124gr | Nosler Assured Stopping Power bullet and 64 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, SNPE Vectan BA7 1/2 and Vihtavuori N350.
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: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 76% | 38,116 psi | 88% | 1486 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 35,911 psi | 83% | 1608 fps | 90.9% |
| Accurate Solo 1000² | <<locked>> | 76% | 36,405 psi | 84% | 1358 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 35,926 psi | 83% | 1417 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 38,841 psi | 89% | 1598 fps | 98.9% |
| ADI AP 70N² | <<locked>> | 68% | 37,579 psi | 86% | 1453 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 37,884 psi | 87% | 1263 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 36,912 psi | 85% | 1289 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 38,305 psi | 88% | 1352 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 39,175 psi | 90% | 1411 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 36,941 psi | 85% | 1417 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 37,652 psi | 87% | 1621 fps | 90.5% |
| Alliant BULLSEYE² | <<locked>> | 72% | 36,840 psi | 85% | 1506 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 38,580 psi | 89% | 1407 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 36,753 psi | 84% | 1503 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 35,752 psi | 82% | 1598 fps | 97.7% |
| Alliant RED DOT | <<locked>> | 80% | 37,159 psi | 85% | 1362 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 38,348 psi | 88% | 1529 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 38,827 psi | 89% | 1539 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 36,042 psi | 83% | 1362 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 36,332 psi | 84% | 1378 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 36,129 psi | 83% | 1381 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 38,769 psi | 89% | 1306 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 38,740 psi | 89% | 1572 fps | 100% |
| Hodgdon Longshot² | <<locked>> | 64% | 37,463 psi | 86% | 1545 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,433 psi | 38% | 1017 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 37,579 psi | 86% | 1453 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 35,911 psi | 83% | 1608 fps | 90.9% |
| Lovex S011² | <<locked>> | 68% | 38,754 psi | 89% | 1421 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 39,146 psi | 90% | 1490 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 36,289 psi | 83% | 1417 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 36,114 psi | 83% | 1417 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 37,405 psi | 86% | 1404 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 35,882 psi | 82% | 1365 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 36,535 psi | 84% | 1319 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 37,840 psi | 87% | 1526 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 38,711 psi | 89% | 1558 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 38,682 psi | 89% | 1427 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 15,476 psi | 36% | 1030 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 38,000 psi | 87% | 1519 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 37,869 psi | 87% | 1624 fps | 94% |
| Rottweil P 801² | <<locked>> | 68% | 38,943 psi | 90% | 1398 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 36,738 psi | 84% | 1627 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 35,911 psi | 83% | 1608 fps | 90.9% |
| SNPE Vectan A0 | <<locked>> | 84% | 36,622 psi | 84% | 1460 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 37,449 psi | 86% | 1417 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 36,448 psi | 84% | 1427 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 37,782 psi | 87% | 1299 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 39,233 psi | 90% | 1555 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 38,957 psi | 90% | 1463 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 36,854 psi | 85% | 1624 fps | 99.1% |
| Somchem MP200² | <<locked>> | 76% | 37,492 psi | 86% | 1509 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 37,028 psi | 85% | 1476 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 39,218 psi | 90% | 1617 fps | 97% |
| Vihtavuori 3N37 | <<locked>> | 84% | 38,928 psi | 89% | 1572 fps | 100% |
| Vihtavuori 3N38* | <<locked>> | 96% | 35,911 psi | 83% | 1581 fps | 94% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 34,737 psi | 80% | 1627 fps | 97.2% |
| Vihtavuori N320² | <<locked>> | 72% | 35,027 psi | 81% | 1358 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 30,893 psi | 71% | 1227 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 38,421 psi | 88% | 1460 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 37,405 psi | 86% | 1483 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 37,579 psi | 86% | 1549 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 36,535 psi | 84% | 1414 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 38,537 psi | 89% | 1467 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 23,235 psi | 53% | 1260 fps | 99.8% |
| Accurate No. 7*² | <<locked>> | 68% | 26,658 psi | 61% | 1440 fps | 85.6% |
| Accurate Solo 1000² | <<locked>> | 60% | 24,468 psi | 56% | 1191 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 20,552 psi | 47% | 1178 fps | 100% |
| ADI AP 100*² | <<locked>> | 64% | 15,113 psi | 35% | 1109 fps | 85.1% |
| ADI AP 70N² | <<locked>> | 60% | 29,646 psi | 68% | 1345 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,440 psi | 61% | 1112 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 24,860 psi | 57% | 1122 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 24,308 psi | 56% | 1158 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 26,121 psi | 60% | 1234 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 21,466 psi | 49% | 1188 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 92% | 30,661 psi | 70% | 1503 fps | 86.9% |
| Alliant BULLSEYE² | <<locked>> | 60% | 26,643 psi | 61% | 1348 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 23,714 psi | 55% | 1194 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 15,098 psi | 35% | 1093 fps | 98.2% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 19,667 psi | 45% | 1270 fps | 88.9% |
| Alliant RED DOT² | <<locked>> | 60% | 23,293 psi | 54% | 1158 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 30,342 psi | 70% | 1414 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 20,798 psi | 48% | 1240 fps | 99.9% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 22,945 psi | 53% | 1175 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,707 psi | 34% | 1027 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 24,976 psi | 57% | 1234 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,060 psi | 48% | 1056 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 29,167 psi | 67% | 1424 fps | 98.7% |
| Hodgdon Longshot² | <<locked>> | 60% | 32,474 psi | 75% | 1473 fps | 99.9% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,527 psi | 17% | 755 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 24,801 psi | 57% | 1266 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 26,658 psi | 61% | 1440 fps | 85.6% |
| Lovex S011² | <<locked>> | 60% | 30,081 psi | 69% | 1309 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 24,091 psi | 55% | 1276 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,667 psi | 45% | 1155 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 20,856 psi | 48% | 1188 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,321 psi | 51% | 1184 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 24,120 psi | 55% | 1194 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,137 psi | 62% | 1194 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 29,225 psi | 67% | 1398 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 33,605 psi | 77% | 1486 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 28,094 psi | 65% | 1289 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,179 psi | 17% | 755 fps | 98.8% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 19,305 psi | 44% | 1217 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 68% | 22,872 psi | 53% | 1345 fps | 85.4% |
| Rottweil P 801² | <<locked>> | 60% | 31,531 psi | 72% | 1306 fps | 100% |
| Rottweil P 806*² | 10.2 gr | 60% | 13,837 psi | 32% | 1148 fps | 88.9% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 26,658 psi | 61% | 1440 fps | 85.6% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,638 psi | 45% | 1178 fps | 99.8% |
| SNPE Vectan A1² | <<locked>> | 60% | 24,221 psi | 56% | 1227 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 23,395 psi | 54% | 1230 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 27,862 psi | 64% | 1168 fps | 100% |
| SNPE Vectan BA7 1/2*² | 7.5 gr | 60% | 16,476 psi | 38% | 1129 fps | 92.7% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 22,902 psi | 53% | 1227 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 21,596 psi | 50% | 1335 fps | 92.8% |
| Somchem MP200² | <<locked>> | 60% | 23,670 psi | 54% | 1289 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 21,843 psi | 50% | 1234 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 26,150 psi | 60% | 1394 fps | 91.4% |
| Vihtavuori 3N37² | <<locked>> | 60% | 18,884 psi | 43% | 1217 fps | 95.9% |
| Vihtavuori 3N38* | <<locked>> | 80% | 22,742 psi | 52% | 1339 fps | 86.4% |
| Vihtavuori N105* | <<locked>> | 80% | 18,869 psi | 43% | 1299 fps | 87% |
| Vihtavuori N320² | <<locked>> | 60% | 25,164 psi | 58% | 1220 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,995 psi | 30% | 919 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 24,120 psi | 55% | 1263 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 21,060 psi | 48% | 1224 fps | 100% |
| Vihtavuori N350*² | 7.3 gr | 60% | 16,215 psi | 37% | 1148 fps | 94.2% |
| Winchester 231² | <<locked>> | 60% | 31,749 psi | 73% | 1352 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 20,175 psi | 46% | 1184 fps | 100% |
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 64 powders for .357 Mag. loaded with the .355 | 124gr | Nosler Assured Stopping Power. Rottweil P 806 delivers the highest muzzle velocity at 1,627 fps; across all powders the maximum-charge window runs from 1,017 fps to 1,627 fps. ADI AP 100 gives the best case fill at 100 %, and 31 of the 64 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 36–90 %, leaving at least 10 % headroom. ADI AP 100, Alliant BLUE DOT, Hodgdon TrailBoss 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. Rottweil P 806, SNPE Vectan BA7 1/2, Vihtavuori N350 rank at the top here: for .357 Mag. 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, Accurate No. 7, Alliant BLUE DOT, Lovex D037.1 burn incompletely and react more sensitively to barrel length and temperature. ADI AP 100, ADI APS 350, ADI APS 450 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.