Load Specifications
Load data in caliber .357 Mag. with .355 | 90gr | Lehigh Defense Xtreme Defense bullet and 66 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant UNIQUE, Vihtavuori N350 and Vihtavuori 3N37.
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. 2 | <<locked>> | 84% | 37,275 psi | 86% | 1749 fps | 100% |
| Accurate No. 5² | <<locked>> | 68% | 35,868 psi | 82% | 1821 fps | 95.7% |
| Accurate Solo 1000 | <<locked>> | 88% | 39,146 psi | 90% | 1670 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 37,014 psi | 85% | 1719 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 29,254 psi | 67% | 1683 fps | 90.8% |
| ADI AP 70N² | <<locked>> | 76% | 35,737 psi | 82% | 1726 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 39,102 psi | 90% | 1529 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 37,521 psi | 86% | 1552 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 37,173 psi | 85% | 1611 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 37,115 psi | 85% | 1673 fps | 100% |
| Alliant BE-86 | <<locked>> | 88% | 35,375 psi | 81% | 1677 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 80% | 36,230 psi | 83% | 1791 fps | 100% |
| Alliant Green Dot | <<locked>> | 88% | 36,521 psi | 84% | 1667 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 29,936 psi | 69% | 1680 fps | 100% |
| Alliant POWER PISTOL* | <<locked>> | 92% | 37,144 psi | 85% | 1896 fps | 93.7% |
| Alliant RED DOT | <<locked>> | 92% | 38,566 psi | 89% | 1660 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 37,521 psi | 86% | 1814 fps | 100% |
| Alliant UNIQUE | <<locked>> | 92% | 35,679 psi | 82% | 1791 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 37,739 psi | 87% | 1657 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 30,255 psi | 70% | 1568 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 39,320 psi | 90% | 1696 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 38,363 psi | 88% | 1759 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 36,724 psi | 84% | 1516 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 36,419 psi | 84% | 1686 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 76% | 38,261 psi | 88% | 1837 fps | 97.9% |
| Hodgdon Longshot² | <<locked>> | 72% | 36,985 psi | 85% | 1818 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 11,821 psi | 27% | 1115 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 39,218 psi | 90% | 1775 fps | 100% |
| Lovex D036² | <<locked>> | 68% | 35,824 psi | 82% | 1818 fps | 95.6% |
| Lovex S011² | <<locked>> | 76% | 39,320 psi | 90% | 1709 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 37,521 psi | 86% | 1762 fps | 100% |
| Maxam CSB 1 | <<locked>> | 96% | 36,883 psi | 85% | 1709 fps | 100% |
| Maxam CSB 2 | <<locked>> | 92% | 36,158 psi | 83% | 1716 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 38,885 psi | 89% | 1709 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 38,783 psi | 89% | 1683 fps | 100% |
| Maxam CSB 5 | <<locked>> | 80% | 35,723 psi | 82% | 1578 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 37,362 psi | 86% | 1804 fps | 100% |
| Ramshot True Blue² | <<locked>> | 72% | 38,464 psi | 88% | 1831 fps | 99% |
| Ramshot Zip² | <<locked>> | 64% | 35,868 psi | 82% | 1690 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 36,143 psi | 83% | 1699 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 10,225 psi | 24% | 1089 fps | 98.8% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 38,754 psi | 89% | 1831 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 96% | 39,117 psi | 90% | 1903 fps | 88.5% |
| Rottweil P 801² | <<locked>> | 76% | 37,260 psi | 86% | 1667 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 35,389 psi | 81% | 1896 fps | 97.9% |
| Shooters World Auto Pistol² | <<locked>> | 68% | 35,824 psi | 82% | 1818 fps | 95.6% |
| SNPE Vectan A0 | <<locked>> | 96% | 37,840 psi | 87% | 1755 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 84% | 36,970 psi | 85% | 1686 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 39,088 psi | 90% | 1739 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 38,435 psi | 88% | 1562 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 36,840 psi | 85% | 1791 fps | 98.3% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 36,999 psi | 85% | 1726 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 88% | 37,202 psi | 86% | 1916 fps | 95.6% |
| Somchem MP200 | <<locked>> | 84% | 36,332 psi | 84% | 1781 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 38,986 psi | 90% | 1795 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 37,942 psi | 87% | 1860 fps | 91.5% |
| Vihtavuori 3N37 | <<locked>> | 92% | 35,926 psi | 83% | 1814 fps | 98.8% |
| Vihtavuori N310² | <<locked>> | 68% | 35,708 psi | 82% | 1539 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 36,985 psi | 85% | 1670 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 27,934 psi | 64% | 1447 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 38,218 psi | 88% | 1759 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 38,363 psi | 88% | 1785 fps | 100% |
| Vihtavuori N350 | <<locked>> | 96% | 36,390 psi | 84% | 1814 fps | 99% |
| Winchester 231² | <<locked>> | 72% | 35,868 psi | 82% | 1690 fps | 100% |
| Winchester 572² | <<locked>> | 64% | 36,143 psi | 83% | 1818 fps | 98.1% |
| Winchester AutoComp | <<locked>> | 92% | 36,463 psi | 84% | 1726 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. 2*² | <<locked>> | 60% | 17,448 psi | 40% | 1339 fps | 93.2% |
| Accurate No. 5*² | <<locked>> | 60% | 26,542 psi | 61% | 1631 fps | 91.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 19,174 psi | 44% | 1325 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 15,476 psi | 36% | 1283 fps | 98.8% |
| ADI AP 100* | <<locked>> | 88% | 21,480 psi | 49% | 1499 fps | 85.1% |
| ADI AP 70N² | <<locked>> | 60% | 22,017 psi | 51% | 1473 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 22,539 psi | 52% | 1273 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 21,002 psi | 48% | 1283 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 18,565 psi | 43% | 1286 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 19,798 psi | 46% | 1362 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 15,592 psi | 36% | 1286 fps | 99.9% |
| Alliant BULLSEYE² | <<locked>> | 60% | 20,407 psi | 47% | 1460 fps | 98.1% |
| Alliant Green Dot² | <<locked>> | 60% | 18,376 psi | 42% | 1329 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 10,341 psi | 24% | 1119 fps | 87% |
| Alliant POWER PISTOL*² | <<locked>> | 76% | 23,525 psi | 54% | 1601 fps | 85.7% |
| Alliant RED DOT² | <<locked>> | 60% | 18,043 psi | 41% | 1296 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 23,525 psi | 54% | 1542 fps | 98.8% |
| Alliant UNIQUE*² | 6.4 gr | 60% | 14,750 psi | 34% | 1299 fps | 93.3% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 17,753 psi | 41% | 1306 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 10,008 psi | 23% | 1089 fps | 99% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 18,695 psi | 43% | 1355 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 29,254 psi | 67% | 1617 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 22,785 psi | 52% | 1293 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 31,517 psi | 72% | 1614 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 21,901 psi | 50% | 1506 fps | 90.3% |
| Hodgdon Longshot*² | <<locked>> | 60% | 23,960 psi | 55% | 1562 fps | 93.8% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 4,917 psi | 11% | 787 fps | 93% |
| Hodgdon Universal² | <<locked>> | 60% | 17,970 psi | 41% | 1371 fps | 99.9% |
| Lovex D036*² | <<locked>> | 60% | 26,498 psi | 61% | 1631 fps | 91.1% |
| Lovex S011² | <<locked>> | 60% | 24,453 psi | 56% | 1470 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 17,260 psi | 40% | 1362 fps | 97.6% |
| Maxam CSB 1² | <<locked>> | 60% | 14,301 psi | 33% | 1240 fps | 98.2% |
| Maxam CSB 2² | <<locked>> | 60% | 14,489 psi | 33% | 1286 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 16,636 psi | 38% | 1299 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 18,289 psi | 42% | 1322 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 21,089 psi | 48% | 1335 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 22,104 psi | 51% | 1503 fps | 96.8% |
| Ramshot True Blue*² | <<locked>> | 60% | 25,048 psi | 58% | 1578 fps | 94.5% |
| Ramshot Zip² | <<locked>> | 60% | 31,082 psi | 71% | 1614 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 19,812 psi | 46% | 1414 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 64% | 4,627 psi | 11% | 778 fps | 86.5% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 13,358 psi | 31% | 1273 fps | 94.2% |
| ReloadSwiss RS 24* | <<locked>> | 92% | 34,693 psi | 80% | 1824 fps | 86.3% |
| Rottweil P 801² | <<locked>> | 60% | 23,424 psi | 54% | 1447 fps | 100% |
| Rottweil P 806* | <<locked>> | 80% | 17,158 psi | 39% | 1483 fps | 86.5% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 26,498 psi | 61% | 1631 fps | 91.1% |
| SNPE Vectan A0*² | <<locked>> | 60% | 14,663 psi | 34% | 1250 fps | 93% |
| SNPE Vectan A1² | <<locked>> | 60% | 18,739 psi | 43% | 1352 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 17,956 psi | 41% | 1339 fps | 98.9% |
| SNPE Vectan BA10² | <<locked>> | 60% | 23,757 psi | 55% | 1335 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 68% | 15,389 psi | 35% | 1296 fps | 85.1% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 16,998 psi | 39% | 1329 fps | 99.3% |
| SNPE Vectan SP 2*² | <<locked>> | 72% | 22,002 psi | 51% | 1588 fps | 86.9% |
| Somchem MP200*² | <<locked>> | 60% | 17,463 psi | 40% | 1371 fps | 94.5% |
| Somchem MS200² | <<locked>> | 60% | 16,143 psi | 37% | 1316 fps | 95.7% |
| Somchem S221*² | <<locked>> | 72% | 28,732 psi | 66% | 1686 fps | 86.6% |
| Vihtavuori 3N37*² | 8.2 gr | 64% | 15,069 psi | 35% | 1322 fps | 86.1% |
| Vihtavuori N310² | <<locked>> | 60% | 28,108 psi | 65% | 1427 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 18,101 psi | 42% | 1339 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 10,138 psi | 23% | 1053 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 16,288 psi | 37% | 1345 fps | 99.8% |
| Vihtavuori N340*² | <<locked>> | 60% | 15,026 psi | 35% | 1289 fps | 94.1% |
| Vihtavuori N350*² | 8.2 gr | 68% | 15,577 psi | 36% | 1339 fps | 87.3% |
| Winchester 231² | <<locked>> | 60% | 24,714 psi | 57% | 1499 fps | 100% |
| Winchester 572² | <<locked>> | 60% | 31,633 psi | 73% | 1736 fps | 96.7% |
| Winchester AutoComp ² | <<locked>> | 60% | 14,562 psi | 33% | 1263 fps | 97.5% |
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 66 powders for .357 Mag. loaded with the .355 | 90gr | Lehigh Defense Xtreme Defense. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,916 fps; across all powders the maximum-charge window runs from 1,089 fps to 1,916 fps. ADI AP 100 gives the best case fill at 100 %, and 49 of the 66 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 24–90 %, 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. Alliant UNIQUE, Vihtavuori N350, Vihtavuori 3N37 rank at the top here: for .357 Mag. with the .355 | 90gr | Lehigh Defense Xtreme Defense they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AP 100, Alliant POWER PISTOL, ReloadSwiss RS 24 burn incompletely and react more sensitively to barrel length and temperature. Alliant Herco, Baschieri & Pellagri 102 Pistol, Hodgdon TrailBoss 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.