Load Specifications
Load data in caliber .357 Mag. with .355 | 123gr | Norma FMJ TC bullet and 64 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, SNPE Vectan BA7 1/2 and Vihtavuori N350.
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% | 37,492 psi | 86% | 1483 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 35,404 psi | 81% | 1604 fps | 90.4% |
| Accurate Solo 1000 | <<locked>> | 80% | 39,349 psi | 90% | 1401 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 38,899 psi | 89% | 1457 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 38,348 psi | 88% | 1591 fps | 98.7% |
| ADI AP 70N² | <<locked>> | 68% | 36,956 psi | 85% | 1453 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 38,159 psi | 88% | 1270 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 36,318 psi | 83% | 1283 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 38,580 psi | 89% | 1358 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 38,508 psi | 89% | 1407 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 37,188 psi | 85% | 1421 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 37,275 psi | 86% | 1621 fps | 90.1% |
| Alliant BULLSEYE² | <<locked>> | 72% | 37,014 psi | 85% | 1512 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 38,827 psi | 89% | 1414 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 39,276 psi | 90% | 1542 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 35,215 psi | 81% | 1594 fps | 97.4% |
| Alliant RED DOT | <<locked>> | 80% | 36,521 psi | 84% | 1355 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 37,695 psi | 87% | 1526 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 39,059 psi | 90% | 1545 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 38,972 psi | 90% | 1398 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 39,146 psi | 90% | 1411 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 35,665 psi | 82% | 1381 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 38,174 psi | 88% | 1306 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 38,247 psi | 88% | 1568 fps | 99.9% |
| Hodgdon Longshot² | <<locked>> | 64% | 36,941 psi | 85% | 1545 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,476 psi | 38% | 1020 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 37,782 psi | 87% | 1463 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 35,404 psi | 81% | 1604 fps | 90.4% |
| Lovex S011² | <<locked>> | 68% | 38,072 psi | 88% | 1417 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 38,537 psi | 89% | 1490 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 39,044 psi | 90% | 1453 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 35,462 psi | 82% | 1414 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 36,811 psi | 85% | 1404 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 36,129 psi | 83% | 1371 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 35,853 psi | 82% | 1316 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 37,260 psi | 86% | 1522 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 38,189 psi | 88% | 1558 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 38,870 psi | 89% | 1437 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 15,113 psi | 35% | 1027 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 37,362 psi | 86% | 1516 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 36,666 psi | 84% | 1611 fps | 93.4% |
| Rottweil P 801² | <<locked>> | 68% | 39,160 psi | 90% | 1404 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 36,274 psi | 83% | 1627 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 35,404 psi | 81% | 1604 fps | 90.4% |
| SNPE Vectan A0 | <<locked>> | 84% | 36,100 psi | 83% | 1457 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 36,898 psi | 85% | 1414 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 35,897 psi | 83% | 1424 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 37,173 psi | 85% | 1296 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 38,740 psi | 89% | 1555 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 39,189 psi | 90% | 1470 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 36,260 psi | 83% | 1621 fps | 98.9% |
| Somchem MP200² | <<locked>> | 76% | 37,753 psi | 87% | 1519 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 36,463 psi | 84% | 1476 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 38,783 psi | 89% | 1617 fps | 96.7% |
| Vihtavuori 3N37 | <<locked>> | 84% | 38,363 psi | 88% | 1572 fps | 100% |
| Vihtavuori 3N38ᴾ | <<locked>> | 100% | 39,175 psi | 90% | 1634 fps | 95% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 33,373 psi | 77% | 1608 fps | 96.6% |
| Vihtavuori N320² | <<locked>> | 76% | 39,015 psi | 90% | 1411 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 30,342 psi | 70% | 1224 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 38,682 psi | 89% | 1470 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 36,811 psi | 85% | 1483 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 36,999 psi | 85% | 1545 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 35,897 psi | 83% | 1411 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 38,058 psi | 87% | 1463 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% | 22,684 psi | 52% | 1253 fps | 99.6% |
| Accurate No. 7*² | <<locked>> | 68% | 26,266 psi | 60% | 1437 fps | 85.1% |
| Accurate Solo 1000² | <<locked>> | 60% | 23,917 psi | 55% | 1184 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 20,639 psi | 47% | 1184 fps | 100% |
| ADI AP 100*² | <<locked>> | 68% | 16,752 psi | 39% | 1161 fps | 86.8% |
| ADI AP 70N² | <<locked>> | 60% | 29,080 psi | 67% | 1342 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,629 psi | 61% | 1119 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,019 psi | 57% | 1129 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 23,670 psi | 54% | 1152 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 25,512 psi | 59% | 1227 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 21,016 psi | 48% | 1184 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 92% | 30,284 psi | 70% | 1503 fps | 86.5% |
| Alliant BULLSEYE² | <<locked>> | 60% | 26,049 psi | 60% | 1342 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 23,830 psi | 55% | 1201 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 15,142 psi | 35% | 1096 fps | 98.1% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 19,740 psi | 45% | 1273 fps | 88.8% |
| Alliant RED DOT² | <<locked>> | 60% | 23,409 psi | 54% | 1165 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 29,776 psi | 68% | 1407 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 20,305 psi | 47% | 1234 fps | 99.9% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 23,076 psi | 53% | 1181 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,779 psi | 34% | 1030 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 24,598 psi | 57% | 1230 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,176 psi | 49% | 1063 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 28,689 psi | 66% | 1421 fps | 98.5% |
| Hodgdon Longshot² | <<locked>> | 60% | 31,995 psi | 74% | 1470 fps | 99.8% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,542 psi | 17% | 758 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 24,250 psi | 56% | 1260 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 26,266 psi | 60% | 1437 fps | 85.1% |
| Lovex S011² | <<locked>> | 60% | 30,284 psi | 70% | 1316 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 24,178 psi | 56% | 1283 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,189 psi | 44% | 1148 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 20,885 psi | 48% | 1194 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,394 psi | 51% | 1191 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 23,496 psi | 54% | 1191 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 26,498 psi | 61% | 1188 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 28,732 psi | 66% | 1398 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 33,098 psi | 76% | 1483 fps | 99.9% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 27,412 psi | 63% | 1286 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,194 psi | 17% | 758 fps | 98.7% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 18,797 psi | 43% | 1211 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 72% | 25,541 psi | 59% | 1407 fps | 87.3% |
| Rottweil P 801² | <<locked>> | 60% | 30,908 psi | 71% | 1302 fps | 100% |
| Rottweil P 806*² | 10.2 gr | 60% | 13,866 psi | 32% | 1155 fps | 88.8% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 26,266 psi | 60% | 1437 fps | 85.1% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,218 psi | 44% | 1171 fps | 99.6% |
| SNPE Vectan A1² | <<locked>> | 60% | 23,728 psi | 55% | 1224 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 22,916 psi | 53% | 1227 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,036 psi | 64% | 1175 fps | 100% |
| SNPE Vectan BA7 1/2*² | 7.5 gr | 60% | 16,549 psi | 38% | 1135 fps | 92.6% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 23,003 psi | 53% | 1234 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 21,161 psi | 49% | 1329 fps | 92.3% |
| Somchem MP200² | <<locked>> | 60% | 23,815 psi | 55% | 1299 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 21,335 psi | 49% | 1227 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 25,788 psi | 59% | 1391 fps | 90.9% |
| Vihtavuori 3N37² | <<locked>> | 60% | 18,478 psi | 42% | 1214 fps | 95.4% |
| Vihtavuori 3N38* | <<locked>> | 80% | 22,408 psi | 52% | 1332 fps | 85.9% |
| Vihtavuori N105* | <<locked>> | 80% | 18,492 psi | 43% | 1293 fps | 86.3% |
| Vihtavuori N320² | <<locked>> | 60% | 25,266 psi | 58% | 1227 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,589 psi | 29% | 912 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 23,554 psi | 54% | 1257 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 20,566 psi | 47% | 1217 fps | 100% |
| Vihtavuori N350*² | 7.3 gr | 60% | 16,244 psi | 37% | 1152 fps | 94% |
| Winchester 231² | <<locked>> | 60% | 31,923 psi | 73% | 1358 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 20,262 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 64 powders for .357 Mag. loaded with the .355 | 123gr | Norma FMJ TC. Vihtavuori 3N38 delivers the highest muzzle velocity at 1,634 fps; across all powders the maximum-charge window runs from 1,020 fps to 1,634 fps. ADI AP 100 gives the best case fill at 100 %, and 33 of the 64 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, Alliant BLUE DOT, Alliant Herco 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, SNPE Vectan BA7 1/2, Vihtavuori N350 rank at the top here: for .357 Mag. with the .355 | 123gr | Norma FMJ TC 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. ADI APS 350, Alliant Herco, Baschieri & Pellagri 102 Pistol 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.