Load Specifications
Load data in caliber .357 Mag. with .358 | 125gr | Rim Rock SWC?FB bullet and 65 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% | 37,942 psi | 87% | 1480 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 36,434 psi | 84% | 1611 fps | 91.4% |
| Accurate Solo 1000² | <<locked>> | 76% | 36,274 psi | 83% | 1352 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 35,795 psi | 82% | 1411 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 38,682 psi | 89% | 1588 fps | 98.9% |
| ADI AP 70N² | <<locked>> | 68% | 37,434 psi | 86% | 1447 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 37,710 psi | 87% | 1257 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 36,767 psi | 85% | 1283 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 39,117 psi | 90% | 1355 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 39,015 psi | 90% | 1404 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 37,594 psi | 86% | 1417 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 38,247 psi | 88% | 1627 fps | 91% |
| Alliant BULLSEYE² | <<locked>> | 72% | 37,579 psi | 86% | 1509 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 39,363 psi | 90% | 1411 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 36,637 psi | 84% | 1496 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 36,376 psi | 84% | 1604 fps | 98% |
| Alliant RED DOT | <<locked>> | 80% | 37,101 psi | 85% | 1355 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 38,232 psi | 88% | 1522 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 36,289 psi | 83% | 1499 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 35,911 psi | 83% | 1352 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 36,970 psi | 85% | 1378 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 35,969 psi | 83% | 1375 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 76% | 35,752 psi | 82% | 1421 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 38,595 psi | 89% | 1299 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 38,595 psi | 89% | 1565 fps | 100% |
| Hodgdon Longshot² | <<locked>> | 64% | 37,318 psi | 86% | 1542 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,882 psi | 39% | 1024 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 38,319 psi | 88% | 1457 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 36,434 psi | 84% | 1611 fps | 91.4% |
| Lovex S011² | <<locked>> | 68% | 38,551 psi | 89% | 1414 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 35,447 psi | 81% | 1440 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 36,172 psi | 83% | 1411 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 36,927 psi | 85% | 1421 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 37,289 psi | 86% | 1398 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 36,651 psi | 84% | 1368 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 36,419 psi | 84% | 1312 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 37,710 psi | 87% | 1516 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 39,334 psi | 90% | 1562 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 35,114 psi | 81% | 1381 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 15,461 psi | 36% | 1027 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 38,725 psi | 89% | 1519 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 37,724 psi | 87% | 1617 fps | 94.1% |
| Rottweil P 801² | <<locked>> | 64% | 35,447 psi | 81% | 1348 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 37,405 psi | 86% | 1631 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 36,434 psi | 84% | 1611 fps | 91.4% |
| SNPE Vectan A0 | <<locked>> | 84% | 36,463 psi | 84% | 1453 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 37,289 psi | 86% | 1407 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 36,332 psi | 84% | 1417 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 37,608 psi | 86% | 1293 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 36,143 psi | 83% | 1509 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 35,534 psi | 82% | 1417 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 36,811 psi | 85% | 1617 fps | 99.2% |
| Somchem MP200² | <<locked>> | 76% | 38,159 psi | 88% | 1512 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 37,724 psi | 87% | 1480 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 34,969 psi | 80% | 1549 fps | 95.8% |
| Vihtavuori 3N37 | <<locked>> | 80% | 34,925 psi | 80% | 1516 fps | 100% |
| Vihtavuori 3N38* | <<locked>> | 96% | 36,477 psi | 84% | 1585 fps | 94.4% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 34,635 psi | 80% | 1617 fps | 97.3% |
| Vihtavuori N320² | <<locked>> | 72% | 35,824 psi | 82% | 1362 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 30,763 psi | 71% | 1224 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 39,233 psi | 90% | 1467 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 38,159 psi | 88% | 1490 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 37,434 psi | 86% | 1542 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 36,405 psi | 84% | 1407 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 39,189 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% | 23,148 psi | 53% | 1253 fps | 99.8% |
| Accurate No. 7*² | <<locked>> | 68% | 27,180 psi | 62% | 1450 fps | 86.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 24,395 psi | 56% | 1184 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 21,103 psi | 49% | 1184 fps | 100% |
| ADI AP 100*² | 7.6 gr | 64% | 15,476 psi | 36% | 1115 fps | 85.7% |
| ADI AP 70N² | <<locked>> | 60% | 29,588 psi | 68% | 1342 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,353 psi | 61% | 1106 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,483 psi | 59% | 1129 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 24,236 psi | 56% | 1152 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 26,078 psi | 60% | 1227 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 21,379 psi | 49% | 1184 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 88% | 27,818 psi | 64% | 1444 fps | 85.3% |
| Alliant BULLSEYE² | <<locked>> | 60% | 26,571 psi | 61% | 1342 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 23,641 psi | 54% | 1188 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 15,476 psi | 36% | 1099 fps | 98.5% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 20,102 psi | 46% | 1276 fps | 89.5% |
| Alliant RED DOT² | <<locked>> | 60% | 23,235 psi | 53% | 1155 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 30,255 psi | 70% | 1407 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 20,769 psi | 48% | 1234 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 23,583 psi | 54% | 1181 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,707 psi | 34% | 1024 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 25,483 psi | 59% | 1234 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 22,902 psi | 53% | 1227 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 20,987 psi | 48% | 1053 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 29,689 psi | 68% | 1427 fps | 98.9% |
| Hodgdon Longshot² | <<locked>> | 60% | 33,025 psi | 76% | 1480 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,847 psi | 18% | 764 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 24,729 psi | 57% | 1260 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 27,180 psi | 62% | 1450 fps | 86.2% |
| Lovex S011² | <<locked>> | 60% | 30,806 psi | 71% | 1316 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 24,685 psi | 57% | 1283 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,667 psi | 45% | 1152 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 21,451 psi | 49% | 1194 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,249 psi | 51% | 1178 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 24,047 psi | 55% | 1188 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,050 psi | 62% | 1188 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 29,805 psi | 69% | 1404 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 34,156 psi | 79% | 1490 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 28,021 psi | 64% | 1286 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,194 psi | 17% | 751 fps | 98.9% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 19,261 psi | 44% | 1211 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 68% | 23,308 psi | 54% | 1348 fps | 86% |
| Rottweil P 801² | <<locked>> | 60% | 31,415 psi | 72% | 1299 fps | 100% |
| Rottweil P 806*² | 10.3 gr | 60% | 14,214 psi | 33% | 1158 fps | 89.6% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 27,180 psi | 62% | 1450 fps | 86.2% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,638 psi | 45% | 1171 fps | 99.8% |
| SNPE Vectan A1² | <<locked>> | 60% | 24,149 psi | 56% | 1220 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 23,337 psi | 54% | 1224 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,485 psi | 65% | 1175 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 16,853 psi | 39% | 1138 fps | 93.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 23,453 psi | 54% | 1234 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 21,625 psi | 50% | 1332 fps | 93% |
| Somchem MP200² | <<locked>> | 60% | 24,250 psi | 56% | 1299 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 21,785 psi | 50% | 1227 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 26,121 psi | 60% | 1391 fps | 91.6% |
| Vihtavuori 3N37² | <<locked>> | 60% | 19,319 psi | 44% | 1227 fps | 96.3% |
| Vihtavuori 3N38* | <<locked>> | 80% | 23,192 psi | 53% | 1345 fps | 87% |
| Vihtavuori N105* | <<locked>> | 80% | 18,811 psi | 43% | 1293 fps | 87.2% |
| Vihtavuori N320² | <<locked>> | 60% | 25,831 psi | 59% | 1227 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,981 psi | 30% | 915 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 24,062 psi | 55% | 1257 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 21,016 psi | 48% | 1220 fps | 100% |
| Vihtavuori N350*² | 7.4 gr | 60% | 16,607 psi | 38% | 1155 fps | 94.6% |
| Winchester 231² | <<locked>> | 60% | 32,372 psi | 74% | 1355 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 20,653 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 17 powders for .357 Mag. loaded with the .358 | 125gr | Rim Rock SWC?FB. Rottweil P 806 delivers the highest muzzle velocity at 1,631 fps; across all powders the maximum-charge window runs from 1,024 fps to 1,631 fps. ADI AP 100 gives the best case fill at 100 %, and 17 of the 17 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, 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 .358 | 125gr | Rim Rock SWC?FB 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.