Load Specifications
Load data in caliber .357 Mag. with .356 | 125gr | Rim Rock RN bullet and 68 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, ReloadSwiss RS 20 and SNPE Vectan BA7 1/2.
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% | 36,840 psi | 85% | 1444 fps | 100% |
| Accurate No. 5² | <<locked>> | 64% | 38,058 psi | 87% | 1558 fps | 99.3% |
| Accurate No. 7* | <<locked>> | 80% | 38,218 psi | 88% | 1614 fps | 91.3% |
| Accurate Solo 1000 | <<locked>> | 80% | 38,348 psi | 88% | 1358 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 37,275 psi | 86% | 1411 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 36,593 psi | 84% | 1535 fps | 98.1% |
| ADI AP 70N² | <<locked>> | 68% | 35,273 psi | 81% | 1401 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 36,622 psi | 84% | 1224 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 38,885 psi | 89% | 1286 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 37,304 psi | 86% | 1316 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 37,434 psi | 86% | 1365 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 35,331 psi | 81% | 1375 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 35,650 psi | 82% | 1562 fps | 88.9% |
| Alliant BULLSEYE² | <<locked>> | 72% | 35,331 psi | 81% | 1460 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 36,912 psi | 85% | 1362 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 37,913 psi | 87% | 1493 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 84% | 37,768 psi | 87% | 1604 fps | 97.9% |
| Alliant RED DOT | <<locked>> | 84% | 38,972 psi | 90% | 1358 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 36,172 psi | 83% | 1476 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 37,768 psi | 87% | 1499 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 38,189 psi | 88% | 1362 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 38,276 psi | 88% | 1375 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 38,247 psi | 88% | 1381 fps | 100% |
| Hodgdon CFE Pistol | <<locked>> | 80% | 38,189 psi | 88% | 1434 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 37,130 psi | 85% | 1263 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 36,448 psi | 84% | 1512 fps | 99.8% |
| Hodgdon Longshot² | <<locked>> | 64% | 35,694 psi | 82% | 1496 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 15,853 psi | 36% | 988 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 36,143 psi | 83% | 1414 fps | 100% |
| Lovex D036² | <<locked>> | 64% | 38,043 psi | 87% | 1558 fps | 99.3% |
| Lovex D037.1* | <<locked>> | 80% | 38,218 psi | 88% | 1614 fps | 91.3% |
| Lovex S011² | <<locked>> | 68% | 37,159 psi | 85% | 1378 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 37,985 psi | 87% | 1453 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 37,652 psi | 87% | 1407 fps | 100% |
| Maxam CSB 2 | <<locked>> | 84% | 38,247 psi | 88% | 1417 fps | 100% |
| Maxam CSB 3 | <<locked>> | 84% | 38,653 psi | 89% | 1394 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 37,739 psi | 87% | 1362 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 38,290 psi | 88% | 1316 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 35,665 psi | 82% | 1470 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 36,970 psi | 85% | 1509 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 36,956 psi | 85% | 1388 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 14,489 psi | 33% | 991 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 36,114 psi | 83% | 1470 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 35,288 psi | 81% | 1558 fps | 92.5% |
| Rottweil P 801² | <<locked>> | 68% | 37,405 psi | 86% | 1355 fps | 100% |
| Rottweil P 806 | <<locked>> | 92% | 38,479 psi | 88% | 1631 fps | 100% |
| Shooters World Auto Pistol² | <<locked>> | 64% | 38,043 psi | 87% | 1558 fps | 99.3% |
| Shooters World Major Pistol* | <<locked>> | 80% | 38,218 psi | 88% | 1614 fps | 91.3% |
| SNPE Vectan A0 | <<locked>> | 88% | 38,305 psi | 88% | 1453 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 35,737 psi | 82% | 1371 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 80% | 38,957 psi | 90% | 1430 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 36,956 psi | 85% | 1263 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 37,724 psi | 87% | 1509 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 37,840 psi | 87% | 1424 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 80% | 39,059 psi | 90% | 1627 fps | 99.2% |
| Somchem MP200² | <<locked>> | 76% | 35,839 psi | 82% | 1463 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 35,998 psi | 83% | 1440 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 37,449 psi | 86% | 1565 fps | 96% |
| Vihtavuori 3N37 | <<locked>> | 84% | 37,144 psi | 85% | 1526 fps | 100% |
| Vihtavuori 3N38*ᴾ | <<locked>> | 100% | 37,275 psi | 86% | 1575 fps | 94% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 31,981 psi | 74% | 1555 fps | 95.8% |
| Vihtavuori N320² | <<locked>> | 76% | 37,956 psi | 87% | 1368 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 29,443 psi | 68% | 1191 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 37,028 psi | 85% | 1424 fps | 100% |
| Vihtavuori N340 | <<locked>> | 84% | 39,262 psi | 90% | 1480 fps | 100% |
| Vihtavuori N350 | <<locked>> | 92% | 39,044 psi | 90% | 1542 fps | 100% |
| Winchester 231² | <<locked>> | 68% | 38,798 psi | 89% | 1417 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 36,419 psi | 84% | 1417 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% | 22,234 psi | 51% | 1217 fps | 99.4% |
| Accurate No. 5² | <<locked>> | 60% | 33,446 psi | 77% | 1490 fps | 98.4% |
| Accurate No. 7*² | <<locked>> | 72% | 29,153 psi | 67% | 1467 fps | 86.6% |
| Accurate Solo 1000² | <<locked>> | 60% | 23,801 psi | 55% | 1158 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 19,972 psi | 46% | 1148 fps | 100% |
| ADI AP 100*² | <<locked>> | 68% | 16,186 psi | 37% | 1125 fps | 85.9% |
| ADI AP 70N² | <<locked>> | 60% | 27,963 psi | 64% | 1299 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 25,440 psi | 58% | 1076 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 24,134 psi | 55% | 1093 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 23,424 psi | 54% | 1122 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 24,743 psi | 57% | 1191 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 20,653 psi | 47% | 1155 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 31,647 psi | 73% | 1496 fps | 86.8% |
| Alliant BULLSEYE² | <<locked>> | 60% | 25,556 psi | 59% | 1306 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 22,989 psi | 53% | 1161 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 14,286 psi | 33% | 1050 fps | 97.3% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 18,637 psi | 43% | 1220 fps | 87.4% |
| Alliant RED DOT² | <<locked>> | 60% | 22,278 psi | 51% | 1122 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 28,790 psi | 66% | 1365 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 19,769 psi | 45% | 1198 fps | 99.7% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 22,379 psi | 51% | 1145 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,214 psi | 33% | 1001 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 23,641 psi | 54% | 1191 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 22,089 psi | 51% | 1198 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 20,189 psi | 46% | 1024 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 27,978 psi | 64% | 1381 fps | 98.1% |
| Hodgdon Longshot² | <<locked>> | 60% | 30,545 psi | 70% | 1421 fps | 99.6% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,382 psi | 17% | 738 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 23,641 psi | 54% | 1227 fps | 100% |
| Lovex D036² | <<locked>> | 60% | 33,388 psi | 77% | 1490 fps | 98.4% |
| Lovex D037.1*² | <<locked>> | 72% | 29,153 psi | 67% | 1467 fps | 86.6% |
| Lovex S011² | <<locked>> | 60% | 29,051 psi | 67% | 1273 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 23,090 psi | 53% | 1240 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 18,521 psi | 43% | 1112 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 20,146 psi | 46% | 1158 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 21,669 psi | 50% | 1155 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 23,380 psi | 54% | 1165 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 26,295 psi | 60% | 1161 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 27,572 psi | 63% | 1348 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 31,720 psi | 73% | 1434 fps | 99.7% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 26,092 psi | 60% | 1243 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,034 psi | 16% | 738 fps | 98.4% |
| ReloadSwiss RS 20² | 6.4 gr | 60% | 18,289 psi | 42% | 1178 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 72% | 24,555 psi | 56% | 1358 fps | 86.2% |
| Rottweil P 801² | <<locked>> | 60% | 29,675 psi | 68% | 1260 fps | 100% |
| Rottweil P 806*² | 9.5 gr | 60% | 12,923 psi | 30% | 1109 fps | 87.2% |
| Shooters World Auto Pistol² | <<locked>> | 60% | 33,388 psi | 77% | 1490 fps | 98.4% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 29,153 psi | 67% | 1467 fps | 86.6% |
| SNPE Vectan A0² | <<locked>> | 60% | 18,753 psi | 43% | 1135 fps | 99.4% |
| SNPE Vectan A1² | <<locked>> | 60% | 23,453 psi | 54% | 1194 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 22,582 psi | 52% | 1198 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 27,253 psi | 63% | 1138 fps | 100% |
| SNPE Vectan BA7 1/2*² | 7 gr | 60% | 15,940 psi | 37% | 1096 fps | 91.7% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 21,843 psi | 50% | 1188 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 20,102 psi | 46% | 1280 fps | 91.2% |
| Somchem MP200² | <<locked>> | 60% | 22,974 psi | 53% | 1257 fps | 99.9% |
| Somchem MS200² | <<locked>> | 60% | 20,856 psi | 48% | 1191 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 24,743 psi | 57% | 1342 fps | 89.9% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 17,811 psi | 41% | 1175 fps | 94.7% |
| Vihtavuori 3N38* | <<locked>> | 84% | 23,989 psi | 55% | 1342 fps | 86.8% |
| Vihtavuori N105* | <<locked>> | 84% | 19,783 psi | 45% | 1306 fps | 87.4% |
| Vihtavuori N320² | <<locked>> | 60% | 24,482 psi | 56% | 1191 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,183 psi | 28% | 886 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 22,989 psi | 53% | 1227 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 20,117 psi | 46% | 1184 fps | 99.9% |
| Vihtavuori N350*² | <<locked>> | 60% | 15,505 psi | 36% | 1109 fps | 93% |
| Winchester 231² | <<locked>> | 60% | 31,009 psi | 71% | 1319 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 19,421 psi | 45% | 1152 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 25 powders for .357 Mag. loaded with the .356 | 125gr | Rim Rock RN. Rottweil P 806 delivers the highest muzzle velocity at 1,631 fps; across all powders the maximum-charge window runs from 988 fps to 1,631 fps. ADI AP 100 gives the best case fill at 100 %, and 25 of the 25 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 33–90 %, 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. Rottweil P 806, ReloadSwiss RS 20, SNPE Vectan BA7 1/2 rank at the top here: for .357 Mag. with the .356 | 125gr | Rim Rock RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ReloadSwiss RS 24, Vihtavuori 3N38 burn incompletely and react more sensitively to barrel length and temperature. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N32C Tin Star 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.