Load Specifications
Load data in caliber .357 Auto Mag. with .355 | 95gr | Sierra Tournament Master bullet and 51 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N105, 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% | 30,777 psi | 83% | 1801 fps | 100% |
| Accurate No. 7*² | <<locked>> | 64% | 29,965 psi | 81% | 1906 fps | 88.5% |
| Accurate Solo 1000² | <<locked>> | 64% | 30,414 psi | 82% | 1670 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 68% | 30,313 psi | 82% | 1739 fps | 100% |
| ADI AP 100 | <<locked>> | 84% | 32,053 psi | 87% | 1913 fps | 97.7% |
| ADI APS 350² | <<locked>> | 64% | 31,575 psi | 85% | 1565 fps | 100% |
| ADI APS 450² | <<locked>> | 68% | 33,402 psi | 90% | 1634 fps | 100% |
| ADI AS 30² | <<locked>> | 68% | 33,054 psi | 89% | 1680 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 32,532 psi | 88% | 1729 fps | 100% |
| Alliant BE-86² | <<locked>> | 68% | 31,763 psi | 86% | 1742 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 84% | 31,053 psi | 84% | 1923 fps | 88.1% |
| Alliant Green Dot² | <<locked>> | 68% | 33,098 psi | 89% | 1739 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 33,199 psi | 90% | 1867 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 31,053 psi | 84% | 1936 fps | 96.5% |
| Alliant RED DOT² | <<locked>> | 68% | 31,749 psi | 86% | 1680 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 68% | 30,690 psi | 83% | 1831 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 33,127 psi | 90% | 1722 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 32,372 psi | 88% | 1713 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 33,344 psi | 90% | 1729 fps | 100% |
| Hodgdon Clays² | <<locked>> | 72% | 30,603 psi | 83% | 1581 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 19,348 psi | 52% | 1391 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 32,358 psi | 87% | 1791 fps | 100% |
| Lovex D037.1*² | <<locked>> | 64% | 29,965 psi | 81% | 1906 fps | 88.5% |
| Lovex S020² | <<locked>> | 64% | 33,011 psi | 89% | 1827 fps | 100% |
| Maxam CSB 1² | <<locked>> | 72% | 31,502 psi | 85% | 1752 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 31,372 psi | 85% | 1745 fps | 100% |
| Maxam CSB 3² | <<locked>> | 68% | 31,865 psi | 86% | 1732 fps | 100% |
| Maxam CSB 4² | <<locked>> | 64% | 30,429 psi | 82% | 1680 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 33,359 psi | 90% | 1670 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 18,028 psi | 49% | 1401 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 33,185 psi | 90% | 1867 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 72% | 32,634 psi | 88% | 1965 fps | 92.6% |
| Rottweil P 806² | <<locked>> | 72% | 29,095 psi | 79% | 1883 fps | 99.2% |
| Shooters World Major Pistol*² | <<locked>> | 64% | 29,965 psi | 81% | 1906 fps | 88.5% |
| SNPE Vectan A0² | <<locked>> | 72% | 31,633 psi | 86% | 1801 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 64% | 31,241 psi | 84% | 1729 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 64% | 30,414 psi | 82% | 1742 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 31,314 psi | 85% | 1854 fps | 99.8% |
| SNPE Vectan BA9 1/2² | <<locked>> | 64% | 29,878 psi | 81% | 1736 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 31,241 psi | 84% | 1942 fps | 97.9% |
| Somchem MP200² | <<locked>> | 64% | 31,894 psi | 86% | 1844 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 31,807 psi | 86% | 1814 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 68% | 30,023 psi | 81% | 1847 fps | 99.9% |
| Vihtavuori 3N38* | <<locked>> | 84% | 32,764 psi | 89% | 1952 fps | 93.5% |
| Vihtavuori N105 | <<locked>> | 88% | 32,372 psi | 88% | 1998 fps | 96.7% |
| Vihtavuori N320² | <<locked>> | 64% | 32,822 psi | 89% | 1726 fps | 100% |
| Vihtavuori N32C Tin Star | <<locked>> | 96% | 32,605 psi | 88% | 1621 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 32,358 psi | 87% | 1788 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 31,676 psi | 86% | 1814 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 32,982 psi | 89% | 1906 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 68% | 29,849 psi | 81% | 1739 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% | 27,354 psi | 74% | 1729 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 25,483 psi | 69% | 1791 fps | 85.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 27,586 psi | 75% | 1617 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 24,076 psi | 65% | 1611 fps | 100% |
| ADI AP 100*² | <<locked>> | 60% | 16,172 psi | 44% | 1460 fps | 86.5% |
| ADI APS 350² | <<locked>> | 60% | 28,500 psi | 77% | 1509 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 27,601 psi | 75% | 1526 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 27,122 psi | 73% | 1568 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 29,588 psi | 80% | 1670 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 25,222 psi | 68% | 1614 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 80% | 27,586 psi | 75% | 1837 fps | 85.7% |
| Alliant Green Dot² | <<locked>> | 60% | 26,919 psi | 73% | 1621 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 17,840 psi | 48% | 1493 fps | 99.4% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 23,888 psi | 65% | 1749 fps | 92.5% |
| Alliant RED DOT² | <<locked>> | 60% | 26,310 psi | 71% | 1575 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 24,410 psi | 66% | 1690 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 26,455 psi | 72% | 1601 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 17,318 psi | 47% | 1394 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 29,501 psi | 80% | 1667 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 23,003 psi | 62% | 1430 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,891 psi | 24% | 1043 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 28,689 psi | 78% | 1719 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 25,483 psi | 69% | 1791 fps | 85.2% |
| Lovex S020² | <<locked>> | 60% | 28,660 psi | 77% | 1742 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 22,640 psi | 61% | 1568 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 25,048 psi | 68% | 1621 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 25,904 psi | 70% | 1617 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 27,572 psi | 75% | 1627 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 30,255 psi | 82% | 1614 fps | 100% |
| ReloadSwiss RS 14² | 6 gr | 60% | 8,369 psi | 23% | 1040 fps | 99.7% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 23,250 psi | 63% | 1660 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 64% | 25,034 psi | 68% | 1772 fps | 87.6% |
| Rottweil P 806*² | <<locked>> | 60% | 19,029 psi | 51% | 1611 fps | 94.1% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 25,483 psi | 69% | 1791 fps | 85.2% |
| SNPE Vectan A0² | <<locked>> | 60% | 22,800 psi | 62% | 1608 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 27,862 psi | 75% | 1663 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 27,108 psi | 73% | 1673 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 19,696 psi | 53% | 1558 fps | 95.7% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 26,861 psi | 73% | 1673 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 27,224 psi | 74% | 1847 fps | 96.3% |
| Somchem MP200² | <<locked>> | 60% | 28,065 psi | 76% | 1765 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 25,425 psi | 69% | 1683 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 23,279 psi | 63% | 1683 fps | 98.3% |
| Vihtavuori 3N38*² | <<locked>> | 72% | 22,814 psi | 62% | 1703 fps | 86.9% |
| Vihtavuori N105*² | 16.4 gr | 72% | 19,290 psi | 52% | 1650 fps | 87.5% |
| Vihtavuori N320² | <<locked>> | 60% | 29,225 psi | 79% | 1663 fps | 100% |
| Vihtavuori N32C Tin Star² | 8 gr | 60% | 15,127 psi | 41% | 1253 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 28,964 psi | 78% | 1726 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 25,150 psi | 68% | 1680 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 19,972 psi | 54% | 1588 fps | 97% |
| Winchester AutoComp ² | <<locked>> | 60% | 23,888 psi | 65% | 1614 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 51 powders for .357 Auto Mag. loaded with the .355 | 95gr | Sierra Tournament Master. Vihtavuori N105 delivers the highest muzzle velocity at 1,998 fps; across all powders the maximum-charge window runs from 1,391 fps to 1,998 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 9 of the 51 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (255 MPa), the top charges use 49–90 %, 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 N105, Vihtavuori N32C Tin Star, ReloadSwiss RS 14 rank at the top here: for .357 Auto Mag. with the .355 | 95gr | Sierra Tournament Master 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.