Load Specifications
Load data in caliber .357 Mag. with .355 | 90gr | Speer Hollow Point Gold Dot bullet and 64 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, SNPE Vectan BA7 1/2 and Alliant UNIQUE.
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% | 34,577 psi | 79% | 1752 fps | 100% |
| Accurate No. 5² | <<locked>> | 64% | 37,057 psi | 85% | 1886 fps | 97.3% |
| Accurate Solo 1000 | <<locked>> | 80% | 36,840 psi | 85% | 1677 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 35,969 psi | 83% | 1736 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 35,360 psi | 81% | 1847 fps | 95.2% |
| ADI AP 70N² | <<locked>> | 72% | 38,058 psi | 87% | 1788 fps | 100% |
| ADI APS 350 | <<locked>> | 80% | 38,914 psi | 89% | 1568 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 37,637 psi | 87% | 1591 fps | 100% |
| ADI AS 30 | <<locked>> | 84% | 39,117 psi | 90% | 1673 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 35,868 psi | 82% | 1683 fps | 100% |
| Alliant BE-86 | <<locked>> | 84% | 38,130 psi | 88% | 1745 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 76% | 37,695 psi | 87% | 1850 fps | 100% |
| Alliant Green Dot | <<locked>> | 84% | 39,015 psi | 90% | 1736 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 36,506 psi | 84% | 1818 fps | 100% |
| Alliant POWER PISTOL* | <<locked>> | 84% | 36,463 psi | 84% | 1926 fps | 94.9% |
| Alliant RED DOT | <<locked>> | 84% | 37,391 psi | 86% | 1677 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 72% | 39,218 psi | 90% | 1877 fps | 100% |
| Alliant UNIQUE | <<locked>> | 88% | 39,305 psi | 90% | 1883 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 36,129 psi | 83% | 1670 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 36,637 psi | 84% | 1686 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 37,391 psi | 86% | 1699 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 36,666 psi | 84% | 1575 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 35,056 psi | 81% | 1827 fps | 98.1% |
| Hodgdon Longshot² | <<locked>> | 68% | 38,769 psi | 89% | 1883 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 15,127 psi | 35% | 1217 fps | 100% |
| Hodgdon Universal | <<locked>> | 80% | 38,058 psi | 87% | 1788 fps | 100% |
| Lovex D036² | <<locked>> | 64% | 37,043 psi | 85% | 1886 fps | 97.2% |
| Lovex S011² | <<locked>> | 68% | 35,723 psi | 82% | 1696 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 35,578 psi | 82% | 1768 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 36,521 psi | 84% | 1739 fps | 100% |
| Maxam CSB 2 | <<locked>> | 84% | 36,361 psi | 84% | 1742 fps | 100% |
| Maxam CSB 3 | <<locked>> | 84% | 38,000 psi | 87% | 1736 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 36,709 psi | 84% | 1686 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 36,999 psi | 85% | 1631 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 72% | 39,218 psi | 90% | 1870 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 35,491 psi | 82% | 1824 fps | 99.2% |
| ReloadSwiss RS 12² | <<locked>> | 76% | 39,131 psi | 90% | 1762 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 14,040 psi | 32% | 1220 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 88% | 38,406 psi | 88% | 1854 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 88% | 37,869 psi | 87% | 1929 fps | 89.9% |
| Rottweil P 801² | <<locked>> | 68% | 36,172 psi | 83% | 1677 fps | 100% |
| Rottweil P 806 | <<locked>> | 92% | 36,666 psi | 84% | 1939 fps | 99% |
| Shooters World Auto Pistol² | <<locked>> | 64% | 37,043 psi | 85% | 1886 fps | 97.2% |
| SNPE Vectan A0 | <<locked>> | 88% | 37,289 psi | 86% | 1788 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 80% | 38,624 psi | 89% | 1749 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 80% | 37,521 psi | 86% | 1755 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 76% | 39,146 psi | 90% | 1611 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 36,332 psi | 84% | 1824 fps | 99% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 36,085 psi | 83% | 1745 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 80% | 37,057 psi | 85% | 1949 fps | 96.7% |
| Somchem MP200 | <<locked>> | 80% | 38,305 psi | 88% | 1850 fps | 100% |
| Somchem MS200 | <<locked>> | 84% | 37,449 psi | 86% | 1808 fps | 100% |
| Somchem S221*² | <<locked>> | 72% | 35,824 psi | 82% | 1867 fps | 92.2% |
| Vihtavuori 3N37 | <<locked>> | 88% | 38,928 psi | 89% | 1900 fps | 99.8% |
| Vihtavuori 3N38*ᴾ | <<locked>> | 100% | 38,754 psi | 89% | 1929 fps | 91.1% |
| Vihtavuori N105*ᴾ | <<locked>> | 100% | 29,994 psi | 69% | 1831 fps | 90.9% |
| Vihtavuori N310² | <<locked>> | 64% | 36,042 psi | 83% | 1575 fps | 100% |
| Vihtavuori N320² | <<locked>> | 76% | 35,476 psi | 82% | 1677 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 33,127 psi | 76% | 1542 fps | 100% |
| Vihtavuori N330 | <<locked>> | 80% | 37,304 psi | 86% | 1775 fps | 100% |
| Vihtavuori N340 | <<locked>> | 84% | 37,347 psi | 86% | 1811 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 35,853 psi | 82% | 1844 fps | 99.5% |
| Winchester 231² | <<locked>> | 68% | 37,898 psi | 87% | 1752 fps | 100% |
| Winchester AutoComp | <<locked>> | 88% | 39,334 psi | 90% | 1798 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% | 20,929 psi | 48% | 1467 fps | 96.9% |
| Accurate No. 5² | <<locked>> | 60% | 32,213 psi | 74% | 1791 fps | 95.5% |
| Accurate Solo 1000² | <<locked>> | 60% | 22,379 psi | 51% | 1421 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 19,014 psi | 44% | 1401 fps | 100% |
| ADI AP 100* | <<locked>> | 80% | 21,393 psi | 49% | 1529 fps | 86.8% |
| ADI AP 70N² | <<locked>> | 60% | 26,963 psi | 62% | 1598 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 24,845 psi | 57% | 1345 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 23,453 psi | 54% | 1358 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 22,626 psi | 52% | 1391 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 24,033 psi | 55% | 1473 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 19,537 psi | 45% | 1404 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 60% | 24,149 psi | 56% | 1585 fps | 99.8% |
| Alliant Green Dot² | <<locked>> | 60% | 22,075 psi | 51% | 1434 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 13,764 psi | 32% | 1266 fps | 93.5% |
| Alliant POWER PISTOL*² | <<locked>> | 68% | 23,119 psi | 53% | 1617 fps | 87% |
| Alliant RED DOT² | <<locked>> | 60% | 21,756 psi | 50% | 1398 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 27,340 psi | 63% | 1657 fps | 100% |
| Alliant UNIQUE² | 7.7 gr | 60% | 18,811 psi | 43% | 1444 fps | 97.6% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 21,437 psi | 49% | 1411 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 13,256 psi | 30% | 1211 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 22,858 psi | 53% | 1460 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 19,609 psi | 45% | 1273 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 26,469 psi | 61% | 1650 fps | 94.8% |
| Hodgdon Longshot² | <<locked>> | 60% | 29,298 psi | 67% | 1713 fps | 97.6% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,918 psi | 16% | 892 fps | 98.6% |
| Hodgdon Universal² | <<locked>> | 60% | 22,568 psi | 52% | 1503 fps | 100% |
| Lovex D036² | <<locked>> | 60% | 32,169 psi | 74% | 1795 fps | 95.5% |
| Lovex S011² | <<locked>> | 60% | 28,079 psi | 65% | 1572 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 21,770 psi | 50% | 1499 fps | 99.8% |
| Maxam CSB 1² | <<locked>> | 60% | 17,796 psi | 41% | 1362 fps | 99.9% |
| Maxam CSB 2² | <<locked>> | 60% | 18,956 psi | 44% | 1414 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 20,465 psi | 47% | 1414 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 22,307 psi | 51% | 1434 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 24,903 psi | 57% | 1430 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 26,629 psi | 61% | 1640 fps | 99.3% |
| Ramshot True Blue² | <<locked>> | 60% | 30,850 psi | 71% | 1736 fps | 98.1% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 25,034 psi | 58% | 1532 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 6,556 psi | 15% | 883 fps | 94.5% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 16,897 psi | 39% | 1407 fps | 98.2% |
| ReloadSwiss RS 24* | <<locked>> | 80% | 29,907 psi | 69% | 1768 fps | 85.5% |
| Rottweil P 801² | <<locked>> | 60% | 28,819 psi | 66% | 1558 fps | 100% |
| Rottweil P 806*² | 13.6 gr | 68% | 16,244 psi | 37% | 1450 fps | 86.4% |
| Shooters World Auto Pistol² | <<locked>> | 60% | 32,169 psi | 74% | 1795 fps | 95.5% |
| SNPE Vectan A0² | <<locked>> | 60% | 17,912 psi | 41% | 1375 fps | 97% |
| SNPE Vectan A1² | <<locked>> | 60% | 22,350 psi | 51% | 1460 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 21,524 psi | 49% | 1457 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 26,527 psi | 61% | 1417 fps | 100% |
| SNPE Vectan BA7 1/2*² | 8.8 gr | 60% | 15,069 psi | 35% | 1306 fps | 86.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 20,856 psi | 48% | 1453 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 18,985 psi | 44% | 1512 fps | 85.3% |
| Somchem MP200² | <<locked>> | 60% | 21,741 psi | 50% | 1512 fps | 98.2% |
| Somchem MS200² | <<locked>> | 60% | 19,827 psi | 46% | 1444 fps | 98.8% |
| Somchem S221*² | <<locked>> | 64% | 27,093 psi | 62% | 1683 fps | 87.4% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 16,810 psi | 39% | 1394 fps | 89.7% |
| Vihtavuori 3N38* | <<locked>> | 92% | 30,922 psi | 71% | 1778 fps | 87.1% |
| Vihtavuori N105* | <<locked>> | 92% | 23,859 psi | 55% | 1683 fps | 86.2% |
| Vihtavuori N310² | <<locked>> | 60% | 32,764 psi | 75% | 1529 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 22,510 psi | 52% | 1450 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 13,503 psi | 31% | 1152 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 20,639 psi | 47% | 1470 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 18,710 psi | 43% | 1424 fps | 97.9% |
| Vihtavuori N350*² | <<locked>> | 60% | 15,360 psi | 35% | 1345 fps | 88.4% |
| Winchester 231² | <<locked>> | 60% | 29,892 psi | 69% | 1624 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 18,318 psi | 42% | 1391 fps | 99.7% |
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 64 powders for .357 Mag. loaded with the .355 | 90gr | Speer Hollow Point Gold Dot. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,949 fps; across all powders the maximum-charge window runs from 1,217 fps to 1,949 fps. ADI AP 100 gives the best case fill at 100 %, and 41 of the 64 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 32–90 %, 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, SNPE Vectan BA7 1/2, Alliant UNIQUE rank at the top here: for .357 Mag. with the .355 | 90gr | Speer Hollow Point Gold Dot they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant POWER PISTOL, ReloadSwiss RS 24, Somchem S221 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.