Load Specifications
Load data in caliber .357 Auto Mag. with .355 | 92.6gr | Sellier & Bellot FMJ bullet and 53 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AP 100, Vihtavuori N32C Tin Star and ReloadSwiss RS 14.
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% | 29,457 psi | 80% | 1785 fps | 100% |
| Accurate No. 7*² | <<locked>> | 68% | 32,576 psi | 88% | 1978 fps | 89.3% |
| Accurate Solo 1000² | <<locked>> | 68% | 32,532 psi | 88% | 1719 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 32,430 psi | 88% | 1791 fps | 100% |
| ADI AP 100 | <<locked>> | 84% | 30,560 psi | 83% | 1886 fps | 96.6% |
| ADI APS 350² | <<locked>> | 64% | 31,067 psi | 84% | 1562 fps | 100% |
| ADI APS 450² | <<locked>> | 68% | 32,619 psi | 88% | 1627 fps | 100% |
| ADI AS 30² | <<locked>> | 68% | 32,039 psi | 87% | 1673 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 31,546 psi | 85% | 1722 fps | 100% |
| Alliant BE-86² | <<locked>> | 68% | 30,298 psi | 82% | 1729 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 88% | 32,561 psi | 88% | 1969 fps | 88.2% |
| Alliant BULLSEYE² | <<locked>> | 64% | 33,112 psi | 90% | 1890 fps | 100% |
| Alliant Green Dot² | <<locked>> | 68% | 32,169 psi | 87% | 1736 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 31,952 psi | 86% | 1857 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 72% | 33,156 psi | 90% | 1998 fps | 96.8% |
| Alliant RED DOT² | <<locked>> | 68% | 31,140 psi | 84% | 1680 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 32,677 psi | 88% | 1886 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 32,314 psi | 87% | 1719 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 31,038 psi | 84% | 1703 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 32,010 psi | 87% | 1722 fps | 100% |
| Hodgdon Clays² | <<locked>> | 76% | 32,779 psi | 89% | 1627 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 18,521 psi | 50% | 1381 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 30,980 psi | 84% | 1778 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 32,576 psi | 88% | 1978 fps | 89.3% |
| Lovex S020² | <<locked>> | 64% | 31,183 psi | 84% | 1808 fps | 100% |
| Maxam CSB 1² | <<locked>> | 72% | 30,255 psi | 82% | 1742 fps | 100% |
| Maxam CSB 2² | <<locked>> | 72% | 33,373 psi | 90% | 1795 fps | 100% |
| Maxam CSB 3² | <<locked>> | 68% | 30,487 psi | 82% | 1719 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 32,503 psi | 88% | 1729 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 32,300 psi | 87% | 1663 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 17,216 psi | 47% | 1391 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 31,894 psi | 86% | 1857 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 72% | 30,879 psi | 83% | 1936 fps | 90.9% |
| Rottweil P 806² | <<locked>> | 76% | 31,053 psi | 84% | 1949 fps | 99.5% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 32,576 psi | 88% | 1978 fps | 89.3% |
| SNPE Vectan A0² | <<locked>> | 72% | 30,574 psi | 83% | 1791 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 64% | 30,197 psi | 82% | 1722 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 33,011 psi | 89% | 1798 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 64% | 33,127 psi | 90% | 1637 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 80% | 33,112 psi | 90% | 1900 fps | 99.8% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 32,387 psi | 88% | 1795 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 29,341 psi | 79% | 1913 fps | 96.8% |
| Somchem MP200² | <<locked>> | 64% | 30,371 psi | 82% | 1827 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 30,632 psi | 83% | 1804 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 72% | 32,140 psi | 87% | 1906 fps | 99.9% |
| Vihtavuori 3N38* | <<locked>> | 84% | 30,980 psi | 84% | 1923 fps | 91.9% |
| Vihtavuori N105 | <<locked>> | 88% | 30,226 psi | 82% | 1965 fps | 95.2% |
| Vihtavuori N320² | <<locked>> | 64% | 31,778 psi | 86% | 1722 fps | 100% |
| Vihtavuori N32C Tin Star | <<locked>> | 96% | 31,560 psi | 85% | 1617 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 30,937 psi | 84% | 1775 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 30,530 psi | 83% | 1808 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 31,154 psi | 84% | 1880 fps | 99.9% |
| Winchester AutoComp ² | <<locked>> | 72% | 31,879 psi | 86% | 1788 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% | 25,976 psi | 70% | 1709 fps | 100% |
| Accurate No. 7*² | <<locked>> | 64% | 27,949 psi | 76% | 1870 fps | 86.4% |
| Accurate Solo 1000² | <<locked>> | 60% | 26,527 psi | 72% | 1604 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 23,090 psi | 62% | 1598 fps | 100% |
| ADI AP 100*² | 11.5 gr | 60% | 15,592 psi | 42% | 1447 fps | 85.1% |
| ADI APS 350² | <<locked>> | 60% | 27,862 psi | 75% | 1503 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 27,137 psi | 73% | 1529 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 26,469 psi | 72% | 1565 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 28,543 psi | 77% | 1663 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 24,091 psi | 65% | 1604 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 84% | 29,182 psi | 79% | 1886 fps | 86% |
| Alliant BULLSEYE² | <<locked>> | 60% | 29,631 psi | 80% | 1818 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 26,310 psi | 71% | 1621 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 17,129 psi | 46% | 1480 fps | 98.9% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 22,931 psi | 62% | 1732 fps | 91.2% |
| Alliant RED DOT² | <<locked>> | 60% | 25,570 psi | 69% | 1572 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 23,496 psi | 64% | 1680 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 25,483 psi | 69% | 1591 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 16,534 psi | 45% | 1385 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 28,065 psi | 76% | 1654 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 22,408 psi | 61% | 1424 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,528 psi | 23% | 1033 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 27,717 psi | 75% | 1713 fps | 100% |
| Lovex D037.1*² | <<locked>> | 64% | 27,949 psi | 76% | 1870 fps | 86.4% |
| Lovex S020² | <<locked>> | 60% | 27,760 psi | 75% | 1739 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 21,698 psi | 59% | 1558 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 23,975 psi | 65% | 1611 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 24,860 psi | 67% | 1604 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 26,527 psi | 72% | 1617 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 29,138 psi | 79% | 1608 fps | 100% |
| ReloadSwiss RS 14² | 5.7 gr | 60% | 8,006 psi | 22% | 1027 fps | 99.2% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 21,959 psi | 59% | 1640 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 64% | 23,685 psi | 64% | 1742 fps | 85.7% |
| Rottweil P 806*² | <<locked>> | 60% | 17,521 psi | 47% | 1578 fps | 92.1% |
| Shooters World Major Pistol*² | <<locked>> | 64% | 27,949 psi | 76% | 1870 fps | 86.4% |
| SNPE Vectan A0² | <<locked>> | 60% | 22,031 psi | 60% | 1598 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 26,818 psi | 73% | 1657 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 25,976 psi | 70% | 1663 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 30,052 psi | 81% | 1581 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 18,869 psi | 51% | 1542 fps | 94.5% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 25,556 psi | 69% | 1660 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 25,744 psi | 70% | 1821 fps | 94.9% |
| Somchem MP200² | <<locked>> | 60% | 26,934 psi | 73% | 1752 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 24,584 psi | 66% | 1673 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 21,973 psi | 59% | 1660 fps | 97.4% |
| Vihtavuori 3N38*² | <<locked>> | 76% | 24,352 psi | 66% | 1755 fps | 87.4% |
| Vihtavuori N105*² | <<locked>> | 76% | 20,494 psi | 55% | 1706 fps | 88.1% |
| Vihtavuori N320² | <<locked>> | 60% | 28,123 psi | 76% | 1654 fps | 100% |
| Vihtavuori N32C Tin Star² | 7.6 gr | 60% | 14,460 psi | 39% | 1247 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 27,514 psi | 74% | 1709 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 23,931 psi | 65% | 1663 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 18,942 psi | 51% | 1568 fps | 95.9% |
| Winchester AutoComp ² | <<locked>> | 60% | 22,858 psi | 62% | 1601 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 53 powders for .357 Auto Mag. loaded with the .355 | 92.6gr | Sellier & Bellot FMJ. Alliant POWER PISTOL delivers the highest muzzle velocity at 1,998 fps; across all powders the maximum-charge window runs from 1,381 fps to 1,998 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 10 of the 53 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (255 MPa), the top charges use 47–90 %, 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. ADI AP 100, Vihtavuori N32C Tin Star, ReloadSwiss RS 14 rank at the top here: for .357 Auto Mag. with the .355 | 92.6gr | Sellier & Bellot FMJ 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 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.