Load Specifications
Load data in caliber .357 Auto Mag. with .357 | 110gr | Speer HPSB GD bullet and 47 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% | 31,836 psi | 86% | 1670 fps | 100% |
| Accurate No. 7*² | <<locked>> | 64% | 30,864 psi | 83% | 1795 fps | 91.1% |
| Accurate Solo 1000² | <<locked>> | 64% | 30,908 psi | 84% | 1532 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 68% | 31,082 psi | 84% | 1601 fps | 100% |
| ADI AP 100 | <<locked>> | 84% | 32,619 psi | 88% | 1775 fps | 98.8% |
| ADI APS 350² | <<locked>> | 64% | 31,778 psi | 86% | 1427 fps | 100% |
| ADI APS 450² | <<locked>> | 64% | 31,038 psi | 84% | 1450 fps | 100% |
| ADI AS 30² | <<locked>> | 64% | 30,676 psi | 83% | 1493 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 33,286 psi | 90% | 1588 fps | 100% |
| Alliant BE-86² | <<locked>> | 68% | 32,314 psi | 87% | 1601 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 84% | 31,850 psi | 86% | 1804 fps | 90.5% |
| Alliant Green Dot² | <<locked>> | 64% | 30,719 psi | 83% | 1549 fps | 100% |
| Alliant Herco | <<locked>> | 80% | 30,821 psi | 83% | 1673 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 32,053 psi | 87% | 1814 fps | 98.1% |
| Alliant RED DOT² | <<locked>> | 68% | 32,561 psi | 88% | 1545 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 68% | 31,879 psi | 86% | 1699 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 64% | 30,574 psi | 83% | 1532 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 33,170 psi | 90% | 1578 fps | 100% |
| Hodgdon Clays² | <<locked>> | 72% | 31,328 psi | 85% | 1453 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 19,972 psi | 54% | 1283 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 32,706 psi | 88% | 1640 fps | 100% |
| Lovex D037.1*² | <<locked>> | 64% | 30,864 psi | 83% | 1795 fps | 91.1% |
| Lovex S020² | <<locked>> | 64% | 33,344 psi | 90% | 1677 fps | 100% |
| Maxam CSB 1² | <<locked>> | 72% | 31,995 psi | 87% | 1611 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 32,256 psi | 87% | 1611 fps | 100% |
| Maxam CSB 3² | <<locked>> | 68% | 32,416 psi | 88% | 1591 fps | 100% |
| Maxam CSB 4² | <<locked>> | 64% | 31,038 psi | 84% | 1545 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 18,347 psi | 50% | 1286 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 68% | 30,443 psi | 82% | 1663 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 68% | 29,341 psi | 79% | 1749 fps | 92.6% |
| Rottweil P 806² | <<locked>> | 72% | 30,371 psi | 82% | 1775 fps | 99.9% |
| Shooters World Major Pistol*² | <<locked>> | 64% | 30,864 psi | 83% | 1795 fps | 91.1% |
| SNPE Vectan A0² | <<locked>> | 72% | 32,605 psi | 88% | 1663 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 64% | 31,879 psi | 86% | 1591 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 64% | 31,082 psi | 84% | 1604 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 31,995 psi | 87% | 1719 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 64% | 30,676 psi | 83% | 1604 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 32,140 psi | 87% | 1818 fps | 99.1% |
| Somchem MP200² | <<locked>> | 64% | 32,518 psi | 88% | 1703 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 32,532 psi | 88% | 1677 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 68% | 30,908 psi | 84% | 1719 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 84% | 33,431 psi | 90% | 1824 fps | 95.4% |
| Vihtavuori N105 | <<locked>> | 84% | 29,733 psi | 80% | 1801 fps | 97.1% |
| Vihtavuori N32C Tin Star | <<locked>> | 92% | 31,198 psi | 84% | 1460 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 32,677 psi | 88% | 1680 fps | 100% |
| Vihtavuori N350² | <<locked>> | 72% | 29,776 psi | 81% | 1696 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 68% | 30,487 psi | 82% | 1604 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% | 27,978 psi | 76% | 1598 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 26,281 psi | 71% | 1686 fps | 88.1% |
| Accurate Solo 1000² | <<locked>> | 60% | 27,760 psi | 75% | 1480 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 24,613 psi | 67% | 1483 fps | 100% |
| ADI AP 100*² | <<locked>> | 60% | 16,708 psi | 45% | 1368 fps | 89.5% |
| ADI APS 350² | <<locked>> | 60% | 28,950 psi | 78% | 1381 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 27,920 psi | 75% | 1398 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 27,485 psi | 74% | 1437 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 30,052 psi | 81% | 1535 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 25,541 psi | 69% | 1483 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 76% | 25,541 psi | 69% | 1654 fps | 86.3% |
| Alliant Green Dot² | <<locked>> | 60% | 27,615 psi | 75% | 1493 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 18,420 psi | 50% | 1391 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 24,860 psi | 67% | 1647 fps | 95% |
| Alliant RED DOT² | <<locked>> | 60% | 26,556 psi | 72% | 1440 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 25,324 psi | 68% | 1568 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 26,992 psi | 73% | 1470 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 18,014 psi | 49% | 1293 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 23,438 psi | 63% | 1312 fps | 100% |
| Hodgdon TrailBoss² | 5.4 gr | 60% | 9,152 psi | 25% | 961 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 29,617 psi | 80% | 1588 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 26,281 psi | 71% | 1686 fps | 88.1% |
| Lovex S020² | <<locked>> | 60% | 29,559 psi | 80% | 1614 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 23,554 psi | 64% | 1453 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 25,773 psi | 70% | 1496 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 26,324 psi | 71% | 1483 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 27,876 psi | 75% | 1490 fps | 100% |
| ReloadSwiss RS 14² | 5.5 gr | 60% | 8,630 psi | 23% | 965 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 23,960 psi | 65% | 1539 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 22,408 psi | 61% | 1575 fps | 87.7% |
| Rottweil P 806² | <<locked>> | 60% | 19,740 psi | 53% | 1519 fps | 96.5% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 26,281 psi | 71% | 1686 fps | 88.1% |
| SNPE Vectan A0² | <<locked>> | 60% | 23,192 psi | 63% | 1480 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 28,616 psi | 77% | 1539 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 27,847 psi | 75% | 1549 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 20,218 psi | 55% | 1453 fps | 97.4% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 27,325 psi | 74% | 1542 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 28,137 psi | 76% | 1729 fps | 98% |
| Somchem MP200² | <<locked>> | 60% | 28,718 psi | 78% | 1631 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 25,933 psi | 70% | 1552 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 23,859 psi | 65% | 1568 fps | 99.4% |
| Vihtavuori 3N38*² | <<locked>> | 68% | 20,943 psi | 57% | 1526 fps | 87.5% |
| Vihtavuori N105*² | <<locked>> | 68% | 17,579 psi | 48% | 1480 fps | 88.1% |
| Vihtavuori N32C Tin Star² | 7.3 gr | 60% | 15,447 psi | 42% | 1152 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 25,860 psi | 70% | 1552 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 20,842 psi | 56% | 1490 fps | 98.6% |
| Winchester AutoComp ² | <<locked>> | 60% | 24,279 psi | 66% | 1486 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 47 powders for .357 Auto Mag. loaded with the .357 | 110gr | Speer HPSB GD. Vihtavuori 3N38 delivers the highest muzzle velocity at 1,824 fps; across all powders the maximum-charge window runs from 1,283 fps to 1,824 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 9 of the 47 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 .357 | 110gr | Speer HPSB GD 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.