Load Specifications
Load data in caliber .357 Auto Mag. with .355 | 147gr | CamPro FP bullet and 38 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N32C Tin Star, ReloadSwiss RS 14 and Hodgdon TrailBoss.
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: 6.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 9*² | <<locked>> | 68% | 30,951 psi | 84% | 1549 fps | 90.4% |
| Accurate Solo 1000² | <<locked>> | 64% | 33,460 psi | 90% | 1319 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 64% | 30,806 psi | 83% | 1339 fps | 100% |
| Accurate TCM*² | <<locked>> | 68% | 30,951 psi | 84% | 1542 fps | 91.6% |
| ADI AP 100 | <<locked>> | 80% | 33,112 psi | 90% | 1526 fps | 100% |
| ADI APS 450² | <<locked>> | 64% | 32,706 psi | 88% | 1240 fps | 100% |
| ADI AS 30² | <<locked>> | 64% | 32,764 psi | 89% | 1280 fps | 100% |
| Alliant BE-86² | <<locked>> | 64% | 31,560 psi | 85% | 1335 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 80% | 32,460 psi | 88% | 1568 fps | 95% |
| Alliant Herco² | <<locked>> | 76% | 31,415 psi | 85% | 1417 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 64% | 31,633 psi | 86% | 1542 fps | 99.8% |
| Alliant RED DOT² | <<locked>> | 64% | 31,720 psi | 86% | 1280 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 64% | 31,459 psi | 85% | 1424 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 64% | 33,301 psi | 90% | 1319 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 80% | 33,214 psi | 90% | 1329 fps | 100% |
| Hodgdon Clays² | <<locked>> | 72% | 33,199 psi | 90% | 1243 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 21,857 psi | 59% | 1106 fps | 100% |
| Lovex D037.2*² | <<locked>> | 68% | 31,792 psi | 86% | 1562 fps | 90.8% |
| Maxam CSB 1² | <<locked>> | 68% | 32,140 psi | 87% | 1352 fps | 100% |
| Maxam CSB 2² | <<locked>> | 64% | 31,836 psi | 86% | 1339 fps | 100% |
| Maxam CSB 3² | <<locked>> | 64% | 31,705 psi | 86% | 1322 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 20,334 psi | 55% | 1115 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 64% | 30,472 psi | 82% | 1398 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 68% | 33,460 psi | 90% | 1578 fps | 97.8% |
| Rottweil P 806² | <<locked>> | 68% | 30,748 psi | 83% | 1522 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 68% | 31,792 psi | 86% | 1562 fps | 90.8% |
| SNPE Vectan A0² | <<locked>> | 68% | 32,343 psi | 87% | 1398 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 26,934 psi | 73% | 1490 fps | 88.5% |
| SNPE Vectan BA7 1/2² | <<locked>> | 72% | 32,039 psi | 87% | 1460 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 64% | 33,446 psi | 90% | 1381 fps | 100% |
| Somchem MS200² | <<locked>> | 64% | 31,981 psi | 86% | 1401 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 64% | 30,298 psi | 82% | 1447 fps | 100% |
| Vihtavuori 3N38² | <<locked>> | 76% | 30,342 psi | 82% | 1512 fps | 97.4% |
| Vihtavuori N105 | <<locked>> | 80% | 31,125 psi | 84% | 1565 fps | 99.7% |
| Vihtavuori N32C Tin Star | <<locked>> | 88% | 31,024 psi | 84% | 1220 fps | 100% |
| Vihtavuori N340² | <<locked>> | 64% | 32,445 psi | 88% | 1411 fps | 100% |
| Vihtavuori N350² | <<locked>> | 68% | 29,849 psi | 81% | 1434 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 64% | 30,081 psi | 81% | 1345 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 6.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 9*² | <<locked>> | 64% | 26,847 psi | 73% | 1467 fps | 87.8% |
| Accurate Solo 1000² | <<locked>> | 60% | 30,400 psi | 82% | 1276 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 27,398 psi | 74% | 1286 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 23,148 psi | 63% | 1378 fps | 86.3% |
| ADI AP 100² | <<locked>> | 60% | 18,753 psi | 51% | 1230 fps | 95.7% |
| ADI APS 450² | <<locked>> | 60% | 29,747 psi | 80% | 1198 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 29,660 psi | 80% | 1234 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 28,485 psi | 77% | 1293 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 64% | 20,117 psi | 54% | 1299 fps | 86.8% |
| Alliant Herco² | <<locked>> | 60% | 20,450 psi | 55% | 1220 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 27,717 psi | 75% | 1467 fps | 99% |
| Alliant RED DOT² | <<locked>> | 60% | 28,645 psi | 77% | 1234 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 28,224 psi | 76% | 1371 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 29,704 psi | 80% | 1270 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 19,682 psi | 53% | 1115 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,309 psi | 68% | 1129 fps | 100% |
| Hodgdon TrailBoss² | 4.9 gr | 60% | 10,051 psi | 27% | 830 fps | 100% |
| Lovex D037.2*² | <<locked>> | 60% | 23,569 psi | 64% | 1391 fps | 85.2% |
| Maxam CSB 1² | <<locked>> | 60% | 25,657 psi | 69% | 1253 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 28,979 psi | 78% | 1299 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 28,834 psi | 78% | 1280 fps | 100% |
| ReloadSwiss RS 14² | 5 gr | 60% | 9,558 psi | 26% | 840 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 27,253 psi | 74% | 1348 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 25,396 psi | 69% | 1424 fps | 94.4% |
| Rottweil P 806² | <<locked>> | 60% | 23,293 psi | 63% | 1385 fps | 99.9% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 23,569 psi | 64% | 1391 fps | 85.2% |
| SNPE Vectan A0² | <<locked>> | 60% | 25,657 psi | 69% | 1289 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 96% | 24,192 psi | 65% | 1430 fps | 86.4% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 22,742 psi | 61% | 1293 fps | 99.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 30,081 psi | 81% | 1335 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 28,703 psi | 78% | 1348 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 26,905 psi | 73% | 1388 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 18,304 psi | 49% | 1243 fps | 90% |
| Vihtavuori N105*² | <<locked>> | 60% | 15,751 psi | 43% | 1217 fps | 91.4% |
| Vihtavuori N32C Tin Star² | 6.6 gr | 60% | 16,824 psi | 45% | 988 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 28,500 psi | 77% | 1352 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 23,221 psi | 63% | 1316 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 26,760 psi | 72% | 1293 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 38 powders for .357 Auto Mag. loaded with the .355 | 147gr | CamPro FP. ReloadSwiss RS 24 delivers the highest muzzle velocity at 1,578 fps; across all powders the maximum-charge window runs from 1,106 fps to 1,578 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 8 of the 38 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (255 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, SNPE Vectan BA6 1/2 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 N32C Tin Star, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for .357 Auto Mag. with the .355 | 147gr | CamPro FP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 9, Accurate TCM, Lovex D037.2 burn incompletely and react more sensitively to barrel length and temperature. Baschieri & Pellagri 102 Pistol, Hodgdon TrailBoss, ReloadSwiss RS 14 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.