Load Specifications
Load data in caliber .357 Mag. with .355 | 125gr | Sierra Sig V-Crown 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% | 38,754 psi | 89% | 1490 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 36,230 psi | 83% | 1611 fps | 91.3% |
| Accurate Solo 1000² | <<locked>> | 76% | 36,970 psi | 85% | 1362 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 35,665 psi | 82% | 1411 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 39,218 psi | 90% | 1598 fps | 99% |
| ADI AP 70N² | <<locked>> | 68% | 37,275 psi | 86% | 1447 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 38,493 psi | 88% | 1266 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 36,564 psi | 84% | 1280 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 38,899 psi | 89% | 1352 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 38,870 psi | 89% | 1401 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 37,362 psi | 86% | 1417 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 38,000 psi | 87% | 1624 fps | 90.9% |
| Alliant BULLSEYE² | <<locked>> | 72% | 37,391 psi | 86% | 1509 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 39,175 psi | 90% | 1411 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 37,188 psi | 85% | 1506 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 36,187 psi | 83% | 1601 fps | 98% |
| Alliant RED DOT | <<locked>> | 80% | 37,826 psi | 87% | 1365 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 38,856 psi | 89% | 1532 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 36,114 psi | 83% | 1496 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 39,305 psi | 90% | 1391 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 36,811 psi | 85% | 1378 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 36,492 psi | 84% | 1381 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 38,392 psi | 88% | 1299 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 39,131 psi | 90% | 1572 fps | 100% |
| Hodgdon Longshot² | <<locked>> | 64% | 37,869 psi | 87% | 1549 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,824 psi | 39% | 1020 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 38,174 psi | 88% | 1457 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 36,230 psi | 83% | 1611 fps | 91.3% |
| Lovex S011² | <<locked>> | 68% | 38,377 psi | 88% | 1414 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 35,288 psi | 81% | 1440 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 36,796 psi | 85% | 1417 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 36,709 psi | 84% | 1421 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 37,101 psi | 85% | 1398 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 36,463 psi | 84% | 1368 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 36,230 psi | 83% | 1309 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 38,319 psi | 88% | 1526 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 39,131 psi | 90% | 1558 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 39,291 psi | 90% | 1430 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 15,418 psi | 35% | 1027 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 38,537 psi | 89% | 1519 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 38,247 psi | 88% | 1627 fps | 94.4% |
| Rottweil P 801² | <<locked>> | 64% | 35,230 psi | 81% | 1348 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 37,884 psi | 87% | 1637 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 36,230 psi | 83% | 1611 fps | 91.3% |
| SNPE Vectan A0 | <<locked>> | 84% | 37,086 psi | 85% | 1460 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 37,869 psi | 87% | 1417 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 36,941 psi | 85% | 1427 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 37,420 psi | 86% | 1289 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 35,955 psi | 83% | 1506 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 36,187 psi | 83% | 1424 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 37,318 psi | 86% | 1624 fps | 99.2% |
| Somchem MP200² | <<locked>> | 76% | 37,971 psi | 87% | 1512 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 37,579 psi | 86% | 1480 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 34,780 psi | 80% | 1549 fps | 95.8% |
| Vihtavuori 3N37 | <<locked>> | 84% | 39,363 psi | 90% | 1575 fps | 100% |
| Vihtavuori 3N38* | <<locked>> | 96% | 36,274 psi | 83% | 1585 fps | 94.4% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 35,186 psi | 81% | 1627 fps | 97.5% |
| Vihtavuori N320² | <<locked>> | 72% | 35,694 psi | 82% | 1362 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 31,357 psi | 72% | 1230 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 39,044 psi | 90% | 1463 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 37,971 psi | 87% | 1486 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 38,043 psi | 87% | 1552 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 36,216 psi | 83% | 1407 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 38,972 psi | 90% | 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% | 23,728 psi | 55% | 1266 fps | 99.9% |
| Accurate No. 7*² | <<locked>> | 68% | 27,035 psi | 62% | 1444 fps | 86.1% |
| Accurate Solo 1000² | <<locked>> | 60% | 24,323 psi | 56% | 1184 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 21,031 psi | 48% | 1184 fps | 100% |
| ADI AP 100*² | <<locked>> | 64% | 15,418 psi | 35% | 1115 fps | 85.7% |
| ADI AP 70N² | <<locked>> | 60% | 30,197 psi | 69% | 1348 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,252 psi | 60% | 1106 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,396 psi | 58% | 1129 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 24,149 psi | 56% | 1152 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 25,918 psi | 60% | 1227 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 21,306 psi | 49% | 1181 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 88% | 27,644 psi | 64% | 1444 fps | 85.3% |
| Alliant BULLSEYE² | <<locked>> | 60% | 27,166 psi | 62% | 1352 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 24,250 psi | 56% | 1201 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 15,432 psi | 35% | 1096 fps | 98.5% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 20,030 psi | 46% | 1276 fps | 89.5% |
| Alliant RED DOT² | <<locked>> | 60% | 23,119 psi | 53% | 1152 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 30,110 psi | 69% | 1407 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 21,277 psi | 49% | 1247 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 23,467 psi | 54% | 1181 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 15,084 psi | 35% | 1033 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 25,353 psi | 58% | 1234 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 20,900 psi | 48% | 1053 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 29,530 psi | 68% | 1427 fps | 98.9% |
| Hodgdon Longshot² | <<locked>> | 60% | 32,895 psi | 76% | 1476 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,803 psi | 18% | 761 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 24,627 psi | 57% | 1260 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 27,035 psi | 62% | 1444 fps | 86.1% |
| Lovex S011² | <<locked>> | 60% | 30,676 psi | 71% | 1312 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 24,584 psi | 56% | 1280 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,595 psi | 45% | 1148 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 21,364 psi | 49% | 1194 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,843 psi | 53% | 1191 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 23,931 psi | 55% | 1188 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 26,963 psi | 62% | 1188 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 29,660 psi | 68% | 1401 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 34,026 psi | 78% | 1490 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 27,905 psi | 64% | 1283 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,165 psi | 16% | 751 fps | 98.9% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 19,189 psi | 44% | 1211 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 68% | 23,206 psi | 53% | 1348 fps | 86% |
| Rottweil P 801² | <<locked>> | 60% | 31,299 psi | 72% | 1296 fps | 100% |
| Rottweil P 806*² | 10.3 gr | 60% | 14,141 psi | 33% | 1155 fps | 89.6% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 27,035 psi | 62% | 1444 fps | 86.1% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,522 psi | 45% | 1171 fps | 99.8% |
| SNPE Vectan A1² | <<locked>> | 60% | 24,642 psi | 57% | 1230 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 23,815 psi | 55% | 1237 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,384 psi | 65% | 1175 fps | 100% |
| SNPE Vectan BA7 1/2*² | 7.6 gr | 60% | 16,795 psi | 39% | 1135 fps | 93.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 23,366 psi | 54% | 1230 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 22,031 psi | 51% | 1342 fps | 93.3% |
| Somchem MP200² | <<locked>> | 60% | 24,163 psi | 56% | 1296 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 22,263 psi | 51% | 1240 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 26,484 psi | 61% | 1401 fps | 91.8% |
| Vihtavuori 3N37² | <<locked>> | 60% | 19,247 psi | 44% | 1224 fps | 96.3% |
| Vihtavuori 3N38* | <<locked>> | 80% | 23,076 psi | 53% | 1342 fps | 86.9% |
| Vihtavuori N105* | <<locked>> | 80% | 19,203 psi | 44% | 1306 fps | 87.7% |
| Vihtavuori N320² | <<locked>> | 60% | 25,744 psi | 59% | 1227 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,966 psi | 30% | 915 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 24,642 psi | 57% | 1270 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 21,509 psi | 49% | 1230 fps | 100% |
| Vihtavuori N350*² | 7.4 gr | 60% | 16,549 psi | 38% | 1152 fps | 94.6% |
| Winchester 231² | <<locked>> | 60% | 32,227 psi | 74% | 1355 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 20,552 psi | 47% | 1188 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 | 125gr | Sierra Sig V-Crown. Rottweil P 806 delivers the highest muzzle velocity at 1,637 fps; across all powders the maximum-charge window runs from 1,020 fps to 1,637 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 35–90 %, 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 | 125gr | Sierra Sig V-Crown 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, Alliant Herco 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.