Load Specifications
Load data in caliber .357 Mag. with .355 | 95gr | Speer TMJ bullet and 67 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, Vihtavuori N350 and ReloadSwiss RS 20.
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"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 76% | 36,013 psi | 83% | 1726 fps | 100% |
| Accurate No. 5² | <<locked>> | 64% | 38,043 psi | 87% | 1854 fps | 98% |
| Accurate No. 7* | <<locked>> | 80% | 38,247 psi | 88% | 1896 fps | 88.3% |
| Accurate Solo 1000 | <<locked>> | 80% | 38,000 psi | 87% | 1644 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 37,434 psi | 86% | 1706 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 36,405 psi | 84% | 1818 fps | 96.3% |
| ADI AP 70N² | <<locked>> | 68% | 35,201 psi | 81% | 1690 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 36,622 psi | 84% | 1490 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 38,624 psi | 89% | 1555 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 37,188 psi | 85% | 1594 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 37,086 psi | 85% | 1650 fps | 100% |
| Alliant BE-86 | <<locked>> | 84% | 38,899 psi | 89% | 1703 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 76% | 39,146 psi | 90% | 1818 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 36,564 psi | 84% | 1647 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 37,376 psi | 86% | 1785 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 84% | 37,521 psi | 86% | 1896 fps | 95.9% |
| Alliant RED DOT | <<locked>> | 84% | 38,609 psi | 89% | 1644 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 36,347 psi | 84% | 1778 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 36,666 psi | 84% | 1785 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 37,449 psi | 86% | 1637 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 37,449 psi | 86% | 1647 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 38,290 psi | 88% | 1660 fps | 100% |
| Hodgdon Clays² | <<locked>> | 76% | 37,260 psi | 86% | 1516 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 36,071 psi | 83% | 1795 fps | 98.8% |
| Hodgdon Longshot² | <<locked>> | 64% | 35,317 psi | 81% | 1778 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 15,722 psi | 36% | 1194 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 35,897 psi | 83% | 1699 fps | 100% |
| Lovex D036² | <<locked>> | 64% | 37,985 psi | 87% | 1850 fps | 98% |
| Lovex D037.1* | <<locked>> | 80% | 38,247 psi | 88% | 1896 fps | 88.3% |
| Lovex S011² | <<locked>> | 68% | 36,230 psi | 83% | 1654 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 37,173 psi | 85% | 1739 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 37,260 psi | 86% | 1696 fps | 100% |
| Maxam CSB 2 | <<locked>> | 84% | 37,159 psi | 85% | 1699 fps | 100% |
| Maxam CSB 3 | <<locked>> | 84% | 38,638 psi | 89% | 1690 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 37,971 psi | 87% | 1657 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 38,189 psi | 88% | 1594 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 35,447 psi | 81% | 1759 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 36,463 psi | 84% | 1791 fps | 99.6% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 36,898 psi | 85% | 1677 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 14,272 psi | 33% | 1191 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 35,795 psi | 82% | 1765 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 88% | 39,131 psi | 90% | 1906 fps | 91.4% |
| Rottweil P 801² | <<locked>> | 68% | 37,521 psi | 86% | 1644 fps | 100% |
| Rottweil P 806 | <<locked>> | 92% | 38,435 psi | 88% | 1919 fps | 99.6% |
| Shooters World Auto Pistol² | <<locked>> | 64% | 37,985 psi | 87% | 1850 fps | 98% |
| Shooters World Major Pistol* | <<locked>> | 80% | 38,247 psi | 88% | 1896 fps | 88.3% |
| SNPE Vectan A0 | <<locked>> | 88% | 38,043 psi | 87% | 1745 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 80% | 39,291 psi | 90% | 1703 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 80% | 38,203 psi | 88% | 1716 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 36,318 psi | 83% | 1526 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 37,246 psi | 86% | 1791 fps | 99.5% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 37,463 psi | 86% | 1713 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 80% | 38,377 psi | 88% | 1919 fps | 97.7% |
| Somchem MP200² | <<locked>> | 76% | 35,766 psi | 82% | 1759 fps | 100% |
| Somchem MS200 | <<locked>> | 84% | 38,914 psi | 89% | 1778 fps | 100% |
| Somchem S221*² | <<locked>> | 72% | 36,912 psi | 85% | 1841 fps | 93.5% |
| Vihtavuori 3N37 | <<locked>> | 84% | 36,579 psi | 84% | 1814 fps | 99.8% |
| Vihtavuori 3N38* | <<locked>> | 96% | 35,563 psi | 82% | 1827 fps | 90.6% |
| Vihtavuori N105*ᴾ | <<locked>> | 100% | 31,285 psi | 72% | 1814 fps | 92.6% |
| Vihtavuori N310² | <<locked>> | 64% | 37,173 psi | 85% | 1542 fps | 100% |
| Vihtavuori N320² | <<locked>> | 76% | 36,013 psi | 83% | 1634 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 34,316 psi | 79% | 1512 fps | 100% |
| Vihtavuori N330 | <<locked>> | 80% | 38,145 psi | 88% | 1732 fps | 100% |
| Vihtavuori N340 | <<locked>> | 84% | 38,189 psi | 88% | 1768 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 36,927 psi | 85% | 1814 fps | 99.9% |
| Winchester 231² | <<locked>> | 68% | 38,609 psi | 89% | 1709 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 36,201 psi | 83% | 1699 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 21,814 psi | 50% | 1447 fps | 97.9% |
| Accurate No. 5² | <<locked>> | 60% | 33,069 psi | 76% | 1762 fps | 96.6% |
| Accurate No. 7*² | <<locked>> | 76% | 32,909 psi | 76% | 1801 fps | 85.6% |
| Accurate Solo 1000² | <<locked>> | 60% | 23,119 psi | 53% | 1391 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 19,319 psi | 44% | 1368 fps | 100% |
| ADI AP 100*² | <<locked>> | 76% | 19,914 psi | 46% | 1447 fps | 86.4% |
| ADI AP 70N² | <<locked>> | 60% | 28,050 psi | 64% | 1568 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 25,512 psi | 59% | 1316 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 24,120 psi | 55% | 1325 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 22,756 psi | 52% | 1352 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 24,323 psi | 56% | 1434 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 19,914 psi | 46% | 1375 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 60% | 25,092 psi | 58% | 1562 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 22,321 psi | 51% | 1394 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 14,344 psi | 33% | 1250 fps | 94.9% |
| Alliant POWER PISTOL*² | <<locked>> | 64% | 21,074 psi | 48% | 1516 fps | 86.2% |
| Alliant RED DOT² | <<locked>> | 60% | 21,915 psi | 50% | 1355 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 28,413 psi | 65% | 1634 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 19,580 psi | 45% | 1424 fps | 98.5% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 21,727 psi | 50% | 1375 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 13,851 psi | 32% | 1191 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 23,351 psi | 54% | 1427 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,875 psi | 59% | 1335 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 27,644 psi | 64% | 1634 fps | 96.1% |
| Hodgdon Longshot² | <<locked>> | 60% | 30,632 psi | 70% | 1693 fps | 98.5% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,179 psi | 17% | 879 fps | 99.3% |
| Hodgdon Universal² | <<locked>> | 60% | 22,931 psi | 53% | 1463 fps | 100% |
| Lovex D036² | <<locked>> | 60% | 33,025 psi | 76% | 1762 fps | 96.5% |
| Lovex D037.1*² | <<locked>> | 76% | 32,909 psi | 76% | 1801 fps | 85.6% |
| Lovex S011² | <<locked>> | 60% | 29,080 psi | 67% | 1539 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 22,756 psi | 52% | 1480 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 18,057 psi | 42% | 1329 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 19,305 psi | 44% | 1378 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 21,263 psi | 49% | 1388 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 22,568 psi | 52% | 1394 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 25,744 psi | 59% | 1401 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 27,224 psi | 63% | 1608 fps | 99.7% |
| Ramshot True Blue² | <<locked>> | 60% | 31,618 psi | 73% | 1706 fps | 98.7% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 26,121 psi | 60% | 1503 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 6,802 psi | 16% | 869 fps | 95.8% |
| ReloadSwiss RS 20² | 8 gr | 60% | 17,753 psi | 41% | 1391 fps | 99.1% |
| ReloadSwiss RS 24* | <<locked>> | 80% | 30,937 psi | 71% | 1749 fps | 87.1% |
| Rottweil P 801² | <<locked>> | 60% | 29,341 psi | 67% | 1519 fps | 100% |
| Rottweil P 806*² | 12.7 gr | 64% | 14,678 psi | 34% | 1358 fps | 85.4% |
| Shooters World Auto Pistol² | <<locked>> | 60% | 33,025 psi | 76% | 1762 fps | 96.5% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 32,909 psi | 76% | 1801 fps | 85.6% |
| SNPE Vectan A0² | <<locked>> | 60% | 18,173 psi | 42% | 1345 fps | 97.8% |
| SNPE Vectan A1² | <<locked>> | 60% | 23,177 psi | 53% | 1434 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 22,307 psi | 51% | 1434 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 27,253 psi | 63% | 1385 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 15,389 psi | 35% | 1283 fps | 87.8% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 21,698 psi | 50% | 1430 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 19,638 psi | 45% | 1493 fps | 87.1% |
| Somchem MP200² | <<locked>> | 60% | 22,655 psi | 52% | 1496 fps | 99% |
| Somchem MS200² | <<locked>> | 60% | 20,595 psi | 47% | 1424 fps | 99.4% |
| Somchem S221*² | <<locked>> | 60% | 24,323 psi | 56% | 1572 fps | 86.3% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 17,593 psi | 40% | 1385 fps | 91.5% |
| Vihtavuori 3N38* | <<locked>> | 88% | 28,282 psi | 65% | 1680 fps | 86.5% |
| Vihtavuori N105* | <<locked>> | 88% | 22,104 psi | 51% | 1594 fps | 85.7% |
| Vihtavuori N310² | <<locked>> | 60% | 33,025 psi | 76% | 1483 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 23,438 psi | 54% | 1424 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 13,677 psi | 31% | 1122 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 21,596 psi | 50% | 1447 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 19,508 psi | 45% | 1404 fps | 98.7% |
| Vihtavuori N350*² | 8.7 gr | 60% | 16,099 psi | 37% | 1335 fps | 90.3% |
| Winchester 231² | <<locked>> | 60% | 30,385 psi | 70% | 1585 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 19,072 psi | 44% | 1371 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 67 powders for .357 Mag. loaded with the .355 | 95gr | Speer TMJ. Rottweil P 806 delivers the highest muzzle velocity at 1,919 fps; across all powders the maximum-charge window runs from 1,191 fps to 1,919 fps. ADI AP 100 gives the best case fill at 100 %, and 40 of the 67 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 33–90 %, leaving at least 10 % headroom. ADI AP 100, Alliant Herco, Baschieri & Pellagri 102 Pistol 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. Rottweil P 806, Vihtavuori N350, ReloadSwiss RS 20 rank at the top here: for .357 Mag. with the .355 | 95gr | Speer TMJ they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 7, Lovex D037.1, ReloadSwiss RS 24 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.