Load Specifications
Load data in caliber .357 Mag. with .355 | 124gr | Prvi Partizan FMJ 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% | 38,392 psi | 88% | 1493 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 36,550 psi | 84% | 1621 fps | 91.4% |
| Accurate Solo 1000² | <<locked>> | 76% | 36,724 psi | 84% | 1368 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 36,216 psi | 83% | 1424 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 38,841 psi | 89% | 1598 fps | 98.9% |
| ADI AP 70N² | <<locked>> | 68% | 37,855 psi | 87% | 1460 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 38,261 psi | 88% | 1270 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 36,361 psi | 84% | 1283 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 38,682 psi | 89% | 1358 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 38,595 psi | 89% | 1407 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 37,101 psi | 85% | 1421 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 38,319 psi | 88% | 1637 fps | 91% |
| Alliant BULLSEYE² | <<locked>> | 72% | 37,130 psi | 85% | 1512 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 38,928 psi | 89% | 1414 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 36,869 psi | 85% | 1509 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 36,593 psi | 84% | 1617 fps | 98% |
| Alliant RED DOT | <<locked>> | 80% | 37,579 psi | 86% | 1368 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 38,595 psi | 89% | 1535 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 39,073 psi | 90% | 1545 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 35,462 psi | 82% | 1355 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 36,550 psi | 84% | 1381 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 36,201 psi | 83% | 1385 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 76% | 36,056 psi | 83% | 1434 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 39,059 psi | 90% | 1312 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 38,769 psi | 89% | 1575 fps | 100% |
| Hodgdon Longshot² | <<locked>> | 64% | 37,579 psi | 86% | 1552 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,708 psi | 38% | 1024 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 37,855 psi | 87% | 1460 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 36,550 psi | 84% | 1621 fps | 91.4% |
| Lovex S011² | <<locked>> | 68% | 39,030 psi | 90% | 1427 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 34,983 psi | 80% | 1444 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 36,535 psi | 84% | 1421 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 36,434 psi | 84% | 1424 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 37,724 psi | 87% | 1411 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 36,245 psi | 83% | 1371 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 36,970 psi | 85% | 1325 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 37,942 psi | 87% | 1529 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 38,769 psi | 89% | 1562 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 39,001 psi | 90% | 1434 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 15,316 psi | 35% | 1030 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 38,189 psi | 88% | 1522 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 37,898 psi | 87% | 1631 fps | 94.2% |
| Rottweil P 801² | <<locked>> | 68% | 39,175 psi | 90% | 1401 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 37,420 psi | 86% | 1640 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 36,550 psi | 84% | 1621 fps | 91.4% |
| SNPE Vectan A0 | <<locked>> | 84% | 36,796 psi | 85% | 1467 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 37,623 psi | 86% | 1421 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 36,637 psi | 84% | 1430 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 38,087 psi | 88% | 1306 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 35,636 psi | 82% | 1512 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 39,175 psi | 90% | 1470 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 36,970 psi | 85% | 1627 fps | 99.2% |
| Somchem MP200² | <<locked>> | 76% | 38,450 psi | 88% | 1526 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 37,275 psi | 86% | 1483 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 35,099 psi | 81% | 1558 fps | 95.8% |
| Vihtavuori 3N37 | <<locked>> | 80% | 35,186 psi | 81% | 1526 fps | 100% |
| Vihtavuori 3N38* | <<locked>> | 96% | 36,651 psi | 84% | 1594 fps | 94.4% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 34,751 psi | 80% | 1627 fps | 97.3% |
| Vihtavuori N320² | <<locked>> | 76% | 39,160 psi | 90% | 1407 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 31,111 psi | 72% | 1234 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 38,696 psi | 89% | 1467 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 37,681 psi | 87% | 1490 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 37,724 psi | 87% | 1555 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 36,796 psi | 85% | 1421 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 38,711 psi | 89% | 1470 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% | 23,525 psi | 54% | 1266 fps | 99.8% |
| Accurate No. 7*² | <<locked>> | 68% | 27,253 psi | 63% | 1457 fps | 86.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 24,134 psi | 55% | 1188 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 20,885 psi | 48% | 1188 fps | 100% |
| ADI AP 100*² | 7.6 gr | 64% | 15,273 psi | 35% | 1115 fps | 85.4% |
| ADI AP 70N² | <<locked>> | 60% | 29,979 psi | 69% | 1352 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,905 psi | 62% | 1122 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,237 psi | 58% | 1132 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 24,004 psi | 55% | 1155 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 25,773 psi | 59% | 1230 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 21,683 psi | 50% | 1194 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 88% | 27,905 psi | 64% | 1453 fps | 85.3% |
| Alliant BULLSEYE² | <<locked>> | 60% | 26,977 psi | 62% | 1355 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 24,062 psi | 55% | 1204 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 15,302 psi | 35% | 1099 fps | 98.3% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 19,870 psi | 46% | 1276 fps | 89.2% |
| Alliant RED DOT² | <<locked>> | 60% | 23,714 psi | 55% | 1168 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 30,589 psi | 70% | 1421 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 21,074 psi | 48% | 1247 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 23,308 psi | 54% | 1184 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,968 psi | 34% | 1033 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 25,135 psi | 58% | 1237 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 23,206 psi | 53% | 1240 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,437 psi | 49% | 1066 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 29,254 psi | 67% | 1430 fps | 98.8% |
| Hodgdon Longshot² | <<locked>> | 60% | 32,590 psi | 75% | 1480 fps | 99.9% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,774 psi | 18% | 764 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 25,121 psi | 58% | 1273 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 27,253 psi | 63% | 1457 fps | 86.2% |
| Lovex S011² | <<locked>> | 60% | 30,414 psi | 70% | 1319 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 24,352 psi | 56% | 1283 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,435 psi | 45% | 1152 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 21,219 psi | 49% | 1198 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,669 psi | 52% | 1194 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 24,497 psi | 56% | 1204 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 26,760 psi | 62% | 1191 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 29,414 psi | 68% | 1404 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 33,678 psi | 77% | 1493 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 27,688 psi | 64% | 1286 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,382 psi | 17% | 764 fps | 99% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 19,000 psi | 44% | 1211 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 68% | 23,003 psi | 53% | 1348 fps | 85.6% |
| Rottweil P 801² | <<locked>> | 60% | 31,850 psi | 73% | 1309 fps | 100% |
| Rottweil P 806*² | 10.4 gr | 60% | 14,286 psi | 33% | 1165 fps | 89.6% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 27,253 psi | 63% | 1457 fps | 86.2% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,392 psi | 45% | 1175 fps | 99.7% |
| SNPE Vectan A1² | <<locked>> | 60% | 24,482 psi | 56% | 1234 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 23,641 psi | 54% | 1237 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,210 psi | 65% | 1178 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 16,650 psi | 38% | 1138 fps | 93% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 23,177 psi | 53% | 1237 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 21,843 psi | 50% | 1342 fps | 93.1% |
| Somchem MP200² | <<locked>> | 60% | 23,960 psi | 55% | 1299 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 22,104 psi | 51% | 1240 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 26,281 psi | 60% | 1401 fps | 91.6% |
| Vihtavuori 3N37² | <<locked>> | 60% | 19,072 psi | 44% | 1227 fps | 96.1% |
| Vihtavuori 3N38* | <<locked>> | 80% | 23,395 psi | 54% | 1355 fps | 87.1% |
| Vihtavuori N105* | <<locked>> | 80% | 18,956 psi | 44% | 1306 fps | 87.2% |
| Vihtavuori N320² | <<locked>> | 60% | 25,556 psi | 59% | 1230 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,850 psi | 30% | 919 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 24,424 psi | 56% | 1270 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 21,335 psi | 49% | 1230 fps | 100% |
| Vihtavuori N350*² | 7.4 gr | 60% | 16,418 psi | 38% | 1155 fps | 94.4% |
| Winchester 231² | <<locked>> | 60% | 31,995 psi | 74% | 1358 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 20,407 psi | 47% | 1191 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 18 powders for .357 Mag. loaded with the .355 | 124gr | Prvi Partizan FMJ. Rottweil P 806 delivers the highest muzzle velocity at 1,640 fps; across all powders the maximum-charge window runs from 1,024 fps to 1,640 fps. ADI AP 100 gives the best case fill at 100 %, and 18 of the 18 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, 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 | Prvi Partizan FMJ 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.