Load Specifications
Load data in caliber .357 Auto Mag. with .355 | 115gr | Sellier & Bellot TFMJ bullet and 49 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. 2² | <<locked>> | 64% | 31,430 psi | 85% | 1611 fps | 100% |
| Accurate No. 7*² | <<locked>> | 64% | 30,197 psi | 82% | 1736 fps | 91.1% |
| Accurate Solo 1000² | <<locked>> | 64% | 31,198 psi | 84% | 1490 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 68% | 31,111 psi | 84% | 1555 fps | 100% |
| ADI AP 100 | <<locked>> | 84% | 32,213 psi | 87% | 1722 fps | 98.9% |
| ADI APS 350² | <<locked>> | 64% | 31,763 psi | 86% | 1381 fps | 100% |
| ADI APS 450² | <<locked>> | 64% | 30,690 psi | 83% | 1401 fps | 100% |
| ADI AS 30² | <<locked>> | 64% | 30,240 psi | 82% | 1437 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 33,156 psi | 90% | 1535 fps | 100% |
| Alliant BE-86² | <<locked>> | 68% | 32,314 psi | 87% | 1555 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 84% | 31,604 psi | 85% | 1755 fps | 90.8% |
| Alliant Green Dot² | <<locked>> | 64% | 30,458 psi | 82% | 1496 fps | 100% |
| Alliant Herco | <<locked>> | 80% | 30,937 psi | 84% | 1624 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 31,430 psi | 85% | 1752 fps | 98.1% |
| Alliant RED DOT² | <<locked>> | 68% | 32,155 psi | 87% | 1493 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 68% | 31,618 psi | 85% | 1644 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 64% | 30,530 psi | 83% | 1483 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 32,750 psi | 89% | 1526 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 33,460 psi | 90% | 1542 fps | 100% |
| Hodgdon Clays² | <<locked>> | 64% | 32,387 psi | 88% | 1404 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 19,667 psi | 53% | 1237 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 32,793 psi | 89% | 1594 fps | 100% |
| Lovex D037.1*² | <<locked>> | 64% | 30,197 psi | 82% | 1736 fps | 91.1% |
| Lovex S020² | <<locked>> | 64% | 33,112 psi | 90% | 1624 fps | 100% |
| Maxam CSB 1² | <<locked>> | 72% | 32,198 psi | 87% | 1565 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 31,821 psi | 86% | 1555 fps | 100% |
| Maxam CSB 3² | <<locked>> | 68% | 32,387 psi | 88% | 1539 fps | 100% |
| Maxam CSB 4² | <<locked>> | 64% | 30,821 psi | 83% | 1493 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 18,449 psi | 50% | 1253 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 68% | 30,240 psi | 82% | 1611 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 72% | 33,083 psi | 89% | 1781 fps | 94.8% |
| Rottweil P 806² | <<locked>> | 72% | 29,776 psi | 81% | 1719 fps | 99.9% |
| Shooters World Major Pistol*² | <<locked>> | 64% | 30,197 psi | 82% | 1736 fps | 91.1% |
| SNPE Vectan A0² | <<locked>> | 72% | 32,489 psi | 88% | 1614 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 64% | 31,705 psi | 86% | 1542 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 64% | 30,893 psi | 84% | 1555 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 31,966 psi | 86% | 1673 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 64% | 30,284 psi | 82% | 1549 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 32,068 psi | 87% | 1765 fps | 99.3% |
| Somchem MP200² | <<locked>> | 64% | 32,445 psi | 88% | 1650 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 32,329 psi | 87% | 1624 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 68% | 30,298 psi | 82% | 1660 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 84% | 33,054 psi | 89% | 1768 fps | 95.5% |
| Vihtavuori N105 | <<locked>> | 88% | 33,156 psi | 90% | 1824 fps | 98.5% |
| Vihtavuori N32C Tin Star | <<locked>> | 92% | 30,879 psi | 83% | 1411 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 33,228 psi | 90% | 1598 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 32,532 psi | 88% | 1631 fps | 100% |
| Vihtavuori N350² | <<locked>> | 72% | 29,486 psi | 80% | 1640 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 68% | 30,487 psi | 82% | 1558 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. 2² | <<locked>> | 60% | 27,441 psi | 74% | 1539 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 25,831 psi | 70% | 1637 fps | 88.3% |
| Accurate Solo 1000² | <<locked>> | 60% | 27,891 psi | 75% | 1434 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 24,874 psi | 67% | 1444 fps | 100% |
| ADI AP 100*² | <<locked>> | 60% | 16,737 psi | 45% | 1335 fps | 90% |
| ADI APS 350² | <<locked>> | 60% | 28,776 psi | 78% | 1332 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 27,934 psi | 76% | 1355 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 27,456 psi | 74% | 1391 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 29,733 psi | 80% | 1480 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 25,628 psi | 69% | 1440 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 76% | 25,034 psi | 68% | 1601 fps | 86.4% |
| Alliant Green Dot² | <<locked>> | 60% | 27,253 psi | 74% | 1440 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 18,304 psi | 49% | 1348 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 24,410 psi | 66% | 1588 fps | 95.1% |
| Alliant RED DOT² | <<locked>> | 60% | 26,455 psi | 72% | 1394 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 25,266 psi | 68% | 1522 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 27,282 psi | 74% | 1430 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 17,796 psi | 48% | 1250 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 29,936 psi | 81% | 1490 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 29,327 psi | 79% | 1355 fps | 100% |
| Hodgdon TrailBoss² | 5.1 gr | 60% | 9,050 psi | 24% | 928 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 29,080 psi | 79% | 1529 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 25,831 psi | 70% | 1637 fps | 88.3% |
| Lovex S020² | <<locked>> | 60% | 29,182 psi | 79% | 1558 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 23,308 psi | 63% | 1404 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 25,556 psi | 69% | 1447 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 26,020 psi | 70% | 1434 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 28,065 psi | 76% | 1447 fps | 100% |
| ReloadSwiss RS 14² | 5.2 gr | 60% | 8,543 psi | 23% | 932 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 23,960 psi | 65% | 1493 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 22,307 psi | 60% | 1532 fps | 88.1% |
| Rottweil P 806² | <<locked>> | 60% | 19,174 psi | 52% | 1470 fps | 96.5% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 25,831 psi | 70% | 1637 fps | 88.3% |
| SNPE Vectan A0² | <<locked>> | 60% | 23,134 psi | 63% | 1437 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 28,268 psi | 76% | 1483 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 27,514 psi | 74% | 1496 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 20,044 psi | 54% | 1407 fps | 97.6% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 27,267 psi | 74% | 1493 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 27,876 psi | 75% | 1680 fps | 98.2% |
| Somchem MP200² | <<locked>> | 60% | 28,485 psi | 77% | 1581 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 25,889 psi | 70% | 1506 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 23,786 psi | 64% | 1522 fps | 99.5% |
| Vihtavuori 3N38*² | <<locked>> | 68% | 20,479 psi | 55% | 1473 fps | 87.5% |
| Vihtavuori N105*² | <<locked>> | 64% | 14,895 psi | 40% | 1348 fps | 85.1% |
| Vihtavuori N32C Tin Star² | 6.9 gr | 60% | 15,273 psi | 41% | 1112 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 29,283 psi | 79% | 1535 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 25,425 psi | 69% | 1499 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 20,581 psi | 56% | 1440 fps | 98.7% |
| Winchester AutoComp ² | <<locked>> | 60% | 24,381 psi | 66% | 1447 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 49 powders for .357 Auto Mag. loaded with the .355 | 115gr | Sellier & Bellot TFMJ. Vihtavuori N105 delivers the highest muzzle velocity at 1,824 fps; across all powders the maximum-charge window runs from 1,237 fps to 1,824 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 9 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (255 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. 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 N32C Tin Star, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for .357 Auto Mag. with the .355 | 115gr | Sellier & Bellot TFMJ 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. 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.