Load Specifications
Load data in caliber .357 Mag. with .356 | 102gr | LEE Mold 356-102-1R 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, Alliant UNIQUE and Vihtavuori N350.
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% | 35,476 psi | 82% | 1654 fps | 100% |
| Accurate No. 5² | <<locked>> | 64% | 38,043 psi | 87% | 1788 fps | 98.6% |
| Accurate No. 7* | <<locked>> | 80% | 37,362 psi | 86% | 1824 fps | 89.1% |
| Accurate Solo 1000 | <<locked>> | 80% | 38,043 psi | 87% | 1581 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 36,782 psi | 85% | 1634 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 35,795 psi | 82% | 1749 fps | 96.8% |
| ADI AP 70N² | <<locked>> | 72% | 38,406 psi | 88% | 1677 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 36,347 psi | 84% | 1430 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 38,667 psi | 89% | 1496 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 36,622 psi | 84% | 1529 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 35,810 psi | 82% | 1575 fps | 100% |
| Alliant BE-86 | <<locked>> | 84% | 38,392 psi | 88% | 1634 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 76% | 38,667 psi | 89% | 1742 fps | 100% |
| Alliant Green Dot | <<locked>> | 84% | 39,204 psi | 90% | 1624 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 36,724 psi | 84% | 1713 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 84% | 37,463 psi | 86% | 1831 fps | 96.6% |
| Alliant RED DOT | <<locked>> | 84% | 38,087 psi | 88% | 1575 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 35,810 psi | 82% | 1703 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 35,752 psi | 82% | 1709 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 36,622 psi | 84% | 1565 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 36,883 psi | 85% | 1578 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 38,029 psi | 87% | 1598 fps | 100% |
| Hodgdon Clays² | <<locked>> | 76% | 36,941 psi | 85% | 1450 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 35,940 psi | 83% | 1732 fps | 99.2% |
| Hodgdon Longshot² | <<locked>> | 64% | 34,447 psi | 79% | 1703 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 14,547 psi | 33% | 1129 fps | 100% |
| Hodgdon Universal | <<locked>> | 80% | 38,406 psi | 88% | 1677 fps | 100% |
| Lovex D036² | <<locked>> | 64% | 37,985 psi | 87% | 1791 fps | 98.6% |
| Lovex D037.1* | <<locked>> | 80% | 37,362 psi | 86% | 1824 fps | 89.1% |
| Lovex S011² | <<locked>> | 68% | 36,347 psi | 84% | 1591 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 36,390 psi | 84% | 1667 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 37,362 psi | 86% | 1634 fps | 100% |
| Maxam CSB 2 | <<locked>> | 84% | 36,796 psi | 85% | 1634 fps | 100% |
| Maxam CSB 3 | <<locked>> | 84% | 37,913 psi | 87% | 1614 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 37,130 psi | 85% | 1578 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 37,971 psi | 87% | 1532 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 35,070 psi | 81% | 1690 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 36,289 psi | 83% | 1729 fps | 99.8% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 35,491 psi | 82% | 1598 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 12,807 psi | 29% | 1115 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 88% | 39,233 psi | 90% | 1745 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 88% | 38,885 psi | 89% | 1841 fps | 92.3% |
| Rottweil P 801² | <<locked>> | 68% | 36,114 psi | 83% | 1565 fps | 100% |
| Rottweil P 806 | <<locked>> | 92% | 37,710 psi | 87% | 1847 fps | 99.7% |
| Shooters World Auto Pistol² | <<locked>> | 64% | 37,985 psi | 87% | 1791 fps | 98.6% |
| Shooters World Major Pistol* | <<locked>> | 80% | 37,362 psi | 86% | 1824 fps | 89.1% |
| SNPE Vectan A0 | <<locked>> | 88% | 37,782 psi | 87% | 1680 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 80% | 38,986 psi | 90% | 1637 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 80% | 37,927 psi | 87% | 1647 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 36,260 psi | 83% | 1463 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 36,535 psi | 84% | 1719 fps | 99.7% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 36,753 psi | 84% | 1640 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 80% | 37,405 psi | 86% | 1844 fps | 98.1% |
| Somchem MP200² | <<locked>> | 76% | 35,128 psi | 81% | 1686 fps | 100% |
| Somchem MS200 | <<locked>> | 84% | 38,319 psi | 88% | 1703 fps | 100% |
| Somchem S221*² | <<locked>> | 72% | 36,013 psi | 83% | 1768 fps | 94.1% |
| Vihtavuori 3N37 | <<locked>> | 84% | 35,665 psi | 82% | 1736 fps | 99.9% |
| Vihtavuori 3N38*ᴾ | <<locked>> | 100% | 39,247 psi | 90% | 1831 fps | 93.2% |
| Vihtavuori N105*ᴾ | <<locked>> | 100% | 30,748 psi | 71% | 1749 fps | 93.4% |
| Vihtavuori N310² | <<locked>> | 64% | 36,666 psi | 84% | 1476 fps | 100% |
| Vihtavuori N320² | <<locked>> | 76% | 35,766 psi | 82% | 1568 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 33,199 psi | 76% | 1444 fps | 100% |
| Vihtavuori N330 | <<locked>> | 80% | 38,261 psi | 88% | 1670 fps | 100% |
| Vihtavuori N340 | <<locked>> | 84% | 37,681 psi | 87% | 1699 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 36,753 psi | 84% | 1749 fps | 100% |
| Winchester 231² | <<locked>> | 68% | 37,956 psi | 87% | 1637 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 35,650 psi | 82% | 1634 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% | 21,321 psi | 49% | 1388 fps | 98.3% |
| Accurate No. 5² | <<locked>> | 60% | 32,793 psi | 75% | 1699 fps | 97.2% |
| Accurate No. 7*² | <<locked>> | 76% | 32,329 psi | 74% | 1736 fps | 86.5% |
| Accurate Solo 1000² | <<locked>> | 60% | 22,481 psi | 52% | 1329 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 18,536 psi | 43% | 1302 fps | 100% |
| ADI AP 100*² | <<locked>> | 76% | 19,145 psi | 44% | 1381 fps | 86.8% |
| ADI AP 70N² | <<locked>> | 60% | 26,513 psi | 61% | 1486 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 24,801 psi | 57% | 1253 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 23,554 psi | 54% | 1266 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 22,278 psi | 51% | 1296 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 23,293 psi | 54% | 1365 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 19,116 psi | 44% | 1309 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 60% | 24,700 psi | 57% | 1496 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 21,799 psi | 50% | 1339 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 13,169 psi | 30% | 1178 fps | 94.5% |
| Alliant POWER PISTOL*² | <<locked>> | 64% | 20,204 psi | 46% | 1447 fps | 86.5% |
| Alliant RED DOT² | <<locked>> | 60% | 21,306 psi | 49% | 1299 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 28,224 psi | 65% | 1568 fps | 100% |
| Alliant UNIQUE² | 7.5 gr | 60% | 18,565 psi | 43% | 1355 fps | 98.5% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 20,929 psi | 48% | 1309 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 12,778 psi | 29% | 1125 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 22,887 psi | 53% | 1368 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,150 psi | 58% | 1273 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 27,122 psi | 62% | 1568 fps | 96.6% |
| Hodgdon Longshot² | <<locked>> | 60% | 29,573 psi | 68% | 1617 fps | 98.7% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,005 psi | 14% | 810 fps | 98.1% |
| Hodgdon Universal² | <<locked>> | 60% | 21,799 psi | 50% | 1394 fps | 100% |
| Lovex D036² | <<locked>> | 60% | 32,764 psi | 75% | 1699 fps | 97.1% |
| Lovex D037.1*² | <<locked>> | 76% | 32,329 psi | 74% | 1736 fps | 86.5% |
| Lovex S011² | <<locked>> | 60% | 28,834 psi | 66% | 1480 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 21,988 psi | 51% | 1414 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 17,695 psi | 41% | 1276 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 18,086 psi | 42% | 1306 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 20,479 psi | 47% | 1322 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 21,799 psi | 50% | 1329 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 24,990 psi | 57% | 1335 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 27,064 psi | 62% | 1549 fps | 99.9% |
| Ramshot True Blue² | <<locked>> | 60% | 31,270 psi | 72% | 1640 fps | 99.1% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 24,947 psi | 57% | 1434 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,439 psi | 13% | 791 fps | 92.9% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 17,042 psi | 39% | 1329 fps | 99.2% |
| ReloadSwiss RS 24*² | <<locked>> | 76% | 27,064 psi | 62% | 1611 fps | 85.8% |
| Rottweil P 801² | <<locked>> | 60% | 28,297 psi | 65% | 1450 fps | 100% |
| Rottweil P 806*² | 13.1 gr | 68% | 15,389 psi | 35% | 1345 fps | 87.6% |
| Shooters World Auto Pistol² | <<locked>> | 60% | 32,764 psi | 75% | 1699 fps | 97.1% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 32,329 psi | 74% | 1736 fps | 86.5% |
| SNPE Vectan A0² | <<locked>> | 60% | 17,550 psi | 40% | 1286 fps | 98% |
| SNPE Vectan A1² | <<locked>> | 60% | 22,220 psi | 51% | 1365 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 21,393 psi | 49% | 1362 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 26,818 psi | 62% | 1322 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 14,649 psi | 34% | 1224 fps | 88% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 20,943 psi | 48% | 1365 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 18,434 psi | 42% | 1417 fps | 87% |
| Somchem MP200² | <<locked>> | 60% | 21,480 psi | 49% | 1421 fps | 99% |
| Somchem MS200² | <<locked>> | 60% | 19,827 psi | 46% | 1362 fps | 99.5% |
| Somchem S221*² | <<locked>> | 60% | 23,366 psi | 54% | 1506 fps | 86.7% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 16,505 psi | 38% | 1312 fps | 91.4% |
| Vihtavuori 3N38* | <<locked>> | 88% | 27,485 psi | 63% | 1614 fps | 87.2% |
| Vihtavuori N105* | <<locked>> | 88% | 21,089 psi | 48% | 1519 fps | 86% |
| Vihtavuori N310² | <<locked>> | 60% | 32,285 psi | 74% | 1417 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 22,553 psi | 52% | 1358 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,691 psi | 29% | 1066 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 20,842 psi | 48% | 1381 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 18,739 psi | 43% | 1339 fps | 98.9% |
| Vihtavuori N350*² | 8.4 gr | 60% | 15,011 psi | 35% | 1263 fps | 90.1% |
| Winchester 231² | <<locked>> | 60% | 30,095 psi | 69% | 1522 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 18,202 psi | 42% | 1306 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 .356 | 102gr | LEE Mold 356-102-1R. Rottweil P 806 delivers the highest muzzle velocity at 1,847 fps; across all powders the maximum-charge window runs from 1,115 fps to 1,847 fps. ADI AP 100 gives the best case fill at 100 %, and 41 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 29–90 %, 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, Alliant UNIQUE, Vihtavuori N350 rank at the top here: for .357 Mag. with the .356 | 102gr | LEE Mold 356-102-1R 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.