Load Specifications
Load data in caliber .357 Mag. with .355 | 124gr | Sierra Sig V-Crown bullet and 63 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, Vihtavuori N350 and ADI AP 100.
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% | 38,740 psi | 89% | 1503 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 36,869 psi | 85% | 1634 fps | 91.7% |
| Accurate Solo 1000² | <<locked>> | 76% | 37,188 psi | 85% | 1378 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 36,622 psi | 84% | 1434 fps | 100% |
| ADI AP 100 | <<locked>> | 96% | 35,839 psi | 82% | 1562 fps | 98.4% |
| ADI AP 70N² | <<locked>> | 68% | 38,247 psi | 88% | 1470 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 37,985 psi | 87% | 1273 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 36,854 psi | 85% | 1296 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 39,175 psi | 90% | 1368 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 35,636 psi | 82% | 1378 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 38,072 psi | 88% | 1437 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 38,624 psi | 89% | 1650 fps | 91.3% |
| Alliant BULLSEYE² | <<locked>> | 72% | 38,363 psi | 88% | 1535 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 39,363 psi | 90% | 1424 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 37,724 psi | 87% | 1526 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 37,333 psi | 86% | 1634 fps | 98.3% |
| Alliant RED DOT | <<locked>> | 80% | 38,203 psi | 88% | 1381 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 38,899 psi | 89% | 1545 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 36,143 psi | 83% | 1512 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 36,753 psi | 84% | 1378 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 37,434 psi | 86% | 1398 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 36,840 psi | 85% | 1398 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 36,100 psi | 83% | 1283 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 34,519 psi | 79% | 1522 fps | 99.8% |
| Hodgdon Longshot² | <<locked>> | 64% | 38,305 psi | 88% | 1568 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 17,202 psi | 40% | 1037 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 39,088 psi | 90% | 1480 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 36,869 psi | 85% | 1634 fps | 91.7% |
| Lovex S011² | <<locked>> | 64% | 35,056 psi | 81% | 1385 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 36,158 psi | 83% | 1463 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 36,840 psi | 85% | 1430 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 36,912 psi | 85% | 1434 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 38,145 psi | 88% | 1424 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 36,753 psi | 84% | 1385 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 36,622 psi | 84% | 1329 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 38,870 psi | 89% | 1545 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 36,056 psi | 83% | 1404 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 15,737 psi | 36% | 1043 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 39,320 psi | 90% | 1542 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 39,088 psi | 90% | 1657 fps | 94.8% |
| Rottweil P 801² | <<locked>> | 64% | 36,289 psi | 83% | 1375 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 38,508 psi | 89% | 1660 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 36,869 psi | 85% | 1634 fps | 91.7% |
| SNPE Vectan A0 | <<locked>> | 84% | 37,753 psi | 87% | 1483 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 37,782 psi | 87% | 1430 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 36,869 psi | 85% | 1440 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 37,681 psi | 87% | 1306 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 36,303 psi | 83% | 1526 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 36,245 psi | 83% | 1440 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 37,811 psi | 87% | 1644 fps | 99.3% |
| Somchem MP200² | <<locked>> | 76% | 38,696 psi | 89% | 1535 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 38,319 psi | 88% | 1503 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 35,650 psi | 82% | 1575 fps | 96.2% |
| Vihtavuori 3N37 | <<locked>> | 80% | 35,926 psi | 83% | 1542 fps | 100% |
| Vihtavuori 3N38* | <<locked>> | 96% | 37,101 psi | 85% | 1611 fps | 94.8% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 36,129 psi | 83% | 1657 fps | 97.8% |
| Vihtavuori N320² | <<locked>> | 72% | 35,984 psi | 83% | 1378 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 31,517 psi | 72% | 1243 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 35,621 psi | 82% | 1437 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 38,769 psi | 89% | 1509 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 38,522 psi | 89% | 1572 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 37,115 psi | 85% | 1430 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 35,839 psi | 82% | 1444 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% | 24,033 psi | 55% | 1283 fps | 99.9% |
| Accurate No. 7*² | <<locked>> | 68% | 27,760 psi | 64% | 1473 fps | 86.8% |
| Accurate Solo 1000² | <<locked>> | 60% | 24,816 psi | 57% | 1204 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 21,408 psi | 49% | 1204 fps | 100% |
| ADI AP 100*² | 7.8 gr | 64% | 15,548 psi | 36% | 1129 fps | 86% |
| ADI AP 70N² | <<locked>> | 60% | 30,472 psi | 70% | 1365 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,890 psi | 62% | 1129 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,904 psi | 60% | 1148 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 24,714 psi | 57% | 1171 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 26,382 psi | 61% | 1243 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 22,118 psi | 51% | 1207 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 88% | 28,413 psi | 65% | 1470 fps | 85.9% |
| Alliant BULLSEYE² | <<locked>> | 60% | 27,485 psi | 63% | 1371 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 24,047 psi | 55% | 1207 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 15,693 psi | 36% | 1115 fps | 98.6% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 20,160 psi | 46% | 1289 fps | 89.7% |
| Alliant RED DOT² | <<locked>> | 60% | 23,757 psi | 55% | 1171 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 31,082 psi | 71% | 1434 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 21,553 psi | 50% | 1263 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 23,873 psi | 55% | 1198 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,968 psi | 34% | 1037 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 25,904 psi | 60% | 1253 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,437 psi | 49% | 1073 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 30,008 psi | 69% | 1447 fps | 99.1% |
| Hodgdon Longshot² | <<locked>> | 60% | 33,373 psi | 77% | 1499 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,905 psi | 18% | 774 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 25,019 psi | 57% | 1276 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 27,760 psi | 64% | 1473 fps | 86.8% |
| Lovex S011² | <<locked>> | 60% | 30,966 psi | 71% | 1332 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 24,874 psi | 57% | 1299 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,957 psi | 46% | 1168 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 21,799 psi | 50% | 1211 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,626 psi | 52% | 1198 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 24,410 psi | 56% | 1207 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,485 psi | 63% | 1207 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 30,313 psi | 70% | 1424 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 28,297 psi | 65% | 1299 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,513 psi | 17% | 774 fps | 99.2% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 19,508 psi | 45% | 1227 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 68% | 23,583 psi | 54% | 1371 fps | 86.4% |
| Rottweil P 801² | <<locked>> | 60% | 32,358 psi | 74% | 1322 fps | 100% |
| Rottweil P 806*² | 10.6 gr | 60% | 14,489 psi | 33% | 1175 fps | 90% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 27,760 psi | 64% | 1473 fps | 86.8% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,841 psi | 46% | 1188 fps | 99.8% |
| SNPE Vectan A1² | <<locked>> | 60% | 24,903 psi | 57% | 1247 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 24,062 psi | 55% | 1250 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,834 psi | 66% | 1191 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 16,955 psi | 39% | 1152 fps | 93.5% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 23,714 psi | 55% | 1250 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 22,147 psi | 51% | 1355 fps | 93.4% |
| Somchem MP200² | <<locked>> | 60% | 24,337 psi | 56% | 1312 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 22,568 psi | 52% | 1257 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 26,876 psi | 62% | 1417 fps | 92.2% |
| Vihtavuori 3N37² | <<locked>> | 60% | 19,435 psi | 45% | 1237 fps | 96.4% |
| Vihtavuori 3N38*² | <<locked>> | 76% | 21,103 psi | 49% | 1306 fps | 85.3% |
| Vihtavuori N105*² | <<locked>> | 76% | 17,085 psi | 39% | 1253 fps | 85.2% |
| Vihtavuori N320² | <<locked>> | 60% | 26,237 psi | 60% | 1243 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 13,402 psi | 31% | 935 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 25,005 psi | 57% | 1286 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 21,799 psi | 50% | 1247 fps | 100% |
| Vihtavuori N350*² | 7.6 gr | 60% | 16,781 psi | 39% | 1168 fps | 94.9% |
| Winchester 231² | <<locked>> | 60% | 32,445 psi | 75% | 1371 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 20,813 psi | 48% | 1204 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 63 powders for .357 Mag. loaded with the .355 | 124gr | Sierra Sig V-Crown. Rottweil P 806 delivers the highest muzzle velocity at 1,660 fps; across all powders the maximum-charge window runs from 1,037 fps to 1,660 fps. Alliant BLUE DOT gives the best case fill at 100 %, and 30 of the 63 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. Alliant BLUE DOT, Hodgdon TrailBoss, ReloadSwiss RS 14 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, Vihtavuori N350, ADI AP 100 rank at the top here: for .357 Mag. with the .355 | 124gr | 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. Alliant Herco, Baschieri & Pellagri 102 Pistol, Hodgdon Clays 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.