Load Specifications
Load data in caliber .357 Mag. with .355 | 125gr | Prvi Partizan FPJ bullet and 65 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N105, 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>> | 72% | 34,751 psi | 80% | 1447 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 37,391 psi | 86% | 1637 fps | 92.2% |
| Accurate Solo 1000² | <<locked>> | 76% | 36,985 psi | 85% | 1371 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 36,405 psi | 84% | 1427 fps | 100% |
| Accurate TCM* | <<locked>> | 84% | 37,130 psi | 85% | 1614 fps | 87.6% |
| ADI AP 100 | <<locked>> | 96% | 36,318 psi | 83% | 1565 fps | 98.6% |
| ADI AP 70N² | <<locked>> | 68% | 38,856 psi | 89% | 1473 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 38,609 psi | 89% | 1276 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 37,434 psi | 86% | 1299 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 36,318 psi | 83% | 1332 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 36,289 psi | 83% | 1378 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 38,609 psi | 89% | 1437 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 39,059 psi | 90% | 1650 fps | 91.7% |
| Alliant BULLSEYE² | <<locked>> | 72% | 38,130 psi | 88% | 1526 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 36,637 psi | 84% | 1388 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 38,218 psi | 88% | 1526 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 37,144 psi | 85% | 1627 fps | 98.4% |
| Alliant RED DOT | <<locked>> | 80% | 37,971 psi | 87% | 1375 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 35,433 psi | 81% | 1493 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 36,767 psi | 85% | 1516 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 36,521 psi | 84% | 1371 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 37,927 psi | 87% | 1398 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 37,289 psi | 86% | 1398 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 76% | 36,840 psi | 85% | 1444 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 39,189 psi | 90% | 1316 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 34,969 psi | 80% | 1522 fps | 99.9% |
| Hodgdon Longshot² | <<locked>> | 64% | 38,740 psi | 89% | 1572 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 17,129 psi | 39% | 1033 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 38,856 psi | 89% | 1473 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 37,391 psi | 86% | 1637 fps | 92.2% |
| Lovex S011² | <<locked>> | 68% | 39,175 psi | 90% | 1430 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 36,840 psi | 85% | 1467 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 37,449 psi | 86% | 1434 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 37,536 psi | 86% | 1434 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 37,898 psi | 87% | 1414 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 37,362 psi | 86% | 1385 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 37,289 psi | 86% | 1332 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 64% | 34,214 psi | 79% | 1480 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 35,839 psi | 82% | 1398 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 15,708 psi | 36% | 1037 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 35,795 psi | 82% | 1493 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 80% | 34,737 psi | 80% | 1581 fps | 93.3% |
| Rottweil P 801² | <<locked>> | 64% | 36,114 psi | 83% | 1365 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 38,972 psi | 90% | 1660 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 37,391 psi | 86% | 1637 fps | 92.2% |
| SNPE Vectan A0 | <<locked>> | 84% | 37,579 psi | 86% | 1476 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 38,348 psi | 88% | 1430 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 37,376 psi | 86% | 1440 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 38,290 psi | 88% | 1309 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 36,782 psi | 85% | 1529 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 36,796 psi | 85% | 1440 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 38,348 psi | 88% | 1650 fps | 99.5% |
| Somchem MP200² | <<locked>> | 76% | 39,218 psi | 90% | 1535 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 38,116 psi | 88% | 1496 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 36,085 psi | 83% | 1578 fps | 96.4% |
| Vihtavuori 3N37 | <<locked>> | 80% | 36,477 psi | 84% | 1545 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 96% | 37,594 psi | 86% | 1614 fps | 95.2% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 36,680 psi | 84% | 1657 fps | 98.1% |
| Vihtavuori N320² | <<locked>> | 72% | 36,666 psi | 84% | 1381 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 32,053 psi | 74% | 1247 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 36,245 psi | 83% | 1440 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 38,508 psi | 89% | 1503 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 39,059 psi | 90% | 1572 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 37,695 psi | 87% | 1430 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 36,318 psi | 83% | 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% | 23,888 psi | 55% | 1276 fps | 99.9% |
| Accurate No. 7*² | <<locked>> | 68% | 28,152 psi | 65% | 1476 fps | 87.3% |
| Accurate Solo 1000² | <<locked>> | 60% | 24,656 psi | 57% | 1198 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 21,335 psi | 49% | 1198 fps | 100% |
| Accurate TCM* | <<locked>> | 80% | 32,677 psi | 75% | 1542 fps | 85.3% |
| ADI AP 100*² | 7.9 gr | 64% | 15,896 psi | 37% | 1135 fps | 86.6% |
| ADI AP 70N² | <<locked>> | 60% | 30,327 psi | 70% | 1358 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,716 psi | 61% | 1122 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,759 psi | 59% | 1142 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 24,598 psi | 57% | 1165 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 26,266 psi | 60% | 1237 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 22,017 psi | 51% | 1201 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 88% | 28,790 psi | 66% | 1473 fps | 86.4% |
| Alliant BULLSEYE² | <<locked>> | 60% | 27,383 psi | 63% | 1365 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 24,584 psi | 56% | 1211 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 15,650 psi | 36% | 1109 fps | 98.7% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 20,552 psi | 47% | 1296 fps | 90.3% |
| Alliant RED DOT² | <<locked>> | 60% | 23,612 psi | 54% | 1168 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 30,908 psi | 71% | 1427 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 21,524 psi | 49% | 1257 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 23,786 psi | 55% | 1191 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 15,331 psi | 35% | 1043 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 25,759 psi | 59% | 1247 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 23,554 psi | 54% | 1247 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,321 psi | 49% | 1066 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 30,487 psi | 70% | 1450 fps | 99.3% |
| Hodgdon Longshot² | <<locked>> | 60% | 33,808 psi | 78% | 1499 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,905 psi | 18% | 771 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 25,556 psi | 59% | 1283 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 28,152 psi | 65% | 1476 fps | 87.3% |
| Lovex S011² | <<locked>> | 60% | 31,575 psi | 73% | 1335 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 25,425 psi | 58% | 1302 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 20,436 psi | 47% | 1171 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 21,741 psi | 50% | 1204 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 23,148 psi | 53% | 1201 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 25,005 psi | 57% | 1214 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,369 psi | 63% | 1201 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 30,168 psi | 69% | 1417 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 28,935 psi | 67% | 1302 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,513 psi | 17% | 771 fps | 99.3% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 19,972 psi | 46% | 1234 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 68% | 23,989 psi | 55% | 1375 fps | 86.9% |
| Rottweil P 801² | <<locked>> | 60% | 32,213 psi | 74% | 1316 fps | 100% |
| Rottweil P 806*² | <<locked>> | 60% | 14,837 psi | 34% | 1181 fps | 90.6% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 28,152 psi | 65% | 1476 fps | 87.3% |
| SNPE Vectan A0² | <<locked>> | 60% | 20,276 psi | 47% | 1194 fps | 99.9% |
| SNPE Vectan A1² | <<locked>> | 60% | 24,758 psi | 57% | 1240 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 23,902 psi | 55% | 1243 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,645 psi | 66% | 1184 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 17,303 psi | 40% | 1155 fps | 94% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 23,569 psi | 54% | 1243 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 22,582 psi | 52% | 1358 fps | 93.9% |
| Somchem MP200² | <<locked>> | 60% | 24,831 psi | 57% | 1316 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 22,466 psi | 52% | 1250 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 27,296 psi | 63% | 1424 fps | 92.6% |
| Vihtavuori 3N37² | <<locked>> | 60% | 19,783 psi | 45% | 1243 fps | 96.8% |
| Vihtavuori 3N38*² | <<locked>> | 76% | 21,509 psi | 49% | 1312 fps | 85.9% |
| Vihtavuori N105*² | 10.6 gr | 76% | 17,405 psi | 40% | 1260 fps | 85.9% |
| Vihtavuori N320² | <<locked>> | 60% | 26,092 psi | 60% | 1237 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 13,373 psi | 31% | 928 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 24,889 psi | 57% | 1280 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 21,727 psi | 50% | 1240 fps | 100% |
| Vihtavuori N350² | 7.7 gr | 60% | 17,172 psi | 39% | 1175 fps | 95.3% |
| Winchester 231² | <<locked>> | 60% | 32,996 psi | 76% | 1371 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 21,205 psi | 49% | 1207 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 15 powders for .357 Mag. loaded with the .355 | 125gr | Prvi Partizan FPJ. Rottweil P 806 delivers the highest muzzle velocity at 1,660 fps; across all powders the maximum-charge window runs from 1,033 fps to 1,660 fps. Alliant BLUE DOT gives the best case fill at 100 %, and 15 of the 15 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. Vihtavuori N105, Vihtavuori N350, ADI AP 100 rank at the top here: for .357 Mag. with the .355 | 125gr | Prvi Partizan FPJ they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant BLUE DOT 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.