Load Specifications
Load data in caliber .357 Maximum with .357 | 158gr | Norma SPFN bullet and 63 powders. The key underlying parameters are shown in the table above.
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: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4100* | <<locked>> | 84% | 38,392 psi | 85% | 1657 fps | 91.4% |
| Accurate No. 2² | <<locked>> | 64% | 37,144 psi | 83% | 1430 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 38,493 psi | 86% | 1637 fps | 99.2% |
| Accurate No. 9² | <<locked>> | 72% | 38,551 psi | 86% | 1644 fps | 96.3% |
| Accurate Solo 1000² | <<locked>> | 68% | 37,985 psi | 84% | 1332 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 39,595 psi | 88% | 1404 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 38,450 psi | 86% | 1637 fps | 97.1% |
| ADI AP 100 | <<locked>> | 84% | 38,899 psi | 87% | 1565 fps | 100% |
| ADI APS 350² | <<locked>> | 68% | 37,550 psi | 84% | 1234 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 39,943 psi | 89% | 1293 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 40,567 psi | 90% | 1332 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 37,202 psi | 83% | 1339 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 37,289 psi | 83% | 1650 fps | 93.7% |
| Alliant BE-86² | <<locked>> | 68% | 37,260 psi | 83% | 1365 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 38,856 psi | 86% | 1640 fps | 98.8% |
| Alliant Green Dot² | <<locked>> | 68% | 38,058 psi | 85% | 1352 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 39,392 psi | 88% | 1480 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 37,927 psi | 84% | 1601 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 88% | 39,653 psi | 88% | 1713 fps | 89.4% |
| Alliant RED DOT² | <<locked>> | 72% | 39,595 psi | 88% | 1342 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 68% | 36,869 psi | 82% | 1453 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 38,783 psi | 86% | 1342 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 37,840 psi | 84% | 1342 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 38,986 psi | 87% | 1362 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 39,755 psi | 88% | 1289 fps | 100% |
| Hodgdon LilGun | <<locked>> | 92% | 39,552 psi | 88% | 1762 fps | 95.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 22,829 psi | 51% | 1086 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 37,985 psi | 84% | 1401 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 38,493 psi | 86% | 1637 fps | 99.2% |
| Lovex D037.2² | <<locked>> | 72% | 39,639 psi | 88% | 1663 fps | 96.6% |
| Lovex S020² | <<locked>> | 64% | 39,363 psi | 88% | 1434 fps | 100% |
| Maxam CSB 1² | <<locked>> | 72% | 36,825 psi | 82% | 1368 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 37,376 psi | 83% | 1365 fps | 100% |
| Maxam CSB 3² | <<locked>> | 68% | 36,883 psi | 82% | 1345 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 38,595 psi | 86% | 1345 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 37,318 psi | 83% | 1283 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 80% | 37,043 psi | 82% | 1654 fps | 94.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 21,350 psi | 47% | 1096 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 40,625 psi | 90% | 1480 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 68% | 35,723 psi | 79% | 1581 fps | 99.6% |
| Rottweil P 806² | <<locked>> | 72% | 38,392 psi | 85% | 1588 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 39,639 psi | 88% | 1663 fps | 96.6% |
| Shooters World Major Pistol² | <<locked>> | 64% | 38,493 psi | 86% | 1637 fps | 99.2% |
| SNPE Vectan A0² | <<locked>> | 72% | 37,652 psi | 84% | 1421 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 40,074 psi | 89% | 1398 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 39,595 psi | 88% | 1411 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 40,611 psi | 90% | 1302 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 29,617 psi | 66% | 1519 fps | 93.5% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 37,971 psi | 84% | 1499 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 39,537 psi | 88% | 1414 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 39,914 psi | 89% | 1614 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 38,029 psi | 85% | 1463 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 37,927 psi | 84% | 1434 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 68% | 36,927 psi | 82% | 1496 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 80% | 36,695 psi | 82% | 1581 fps | 99.9% |
| Vihtavuori N105 | <<locked>> | 84% | 38,783 psi | 86% | 1637 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 38,014 psi | 85% | 1683 fps | 94.6% |
| Vihtavuori N320² | <<locked>> | 64% | 38,508 psi | 86% | 1345 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 40,509 psi | 90% | 1289 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 38,653 psi | 86% | 1401 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 38,130 psi | 85% | 1437 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 40,364 psi | 90% | 1532 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 39,537 psi | 88% | 1424 fps | 100% |
Start Load - Barrel Length: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4100*² | <<locked>> | 76% | 29,153 psi | 65% | 1499 fps | 86.5% |
| Accurate No. 2² | <<locked>> | 60% | 32,300 psi | 72% | 1368 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 32,779 psi | 73% | 1552 fps | 98% |
| Accurate No. 9*² | <<locked>> | 60% | 25,092 psi | 56% | 1404 fps | 89.8% |
| Accurate Solo 1000² | <<locked>> | 60% | 31,517 psi | 70% | 1250 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 28,776 psi | 64% | 1266 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 25,324 psi | 56% | 1404 fps | 91.3% |
| ADI AP 100² | <<locked>> | 60% | 20,030 psi | 45% | 1237 fps | 98.4% |
| ADI APS 350² | <<locked>> | 60% | 31,546 psi | 70% | 1158 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 30,458 psi | 68% | 1171 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 30,632 psi | 68% | 1207 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 33,939 psi | 75% | 1296 fps | 100% |
| Alliant 2400*² | <<locked>> | 68% | 25,425 psi | 57% | 1430 fps | 87.1% |
| Alliant BE-86² | <<locked>> | 60% | 29,979 psi | 67% | 1270 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 19,116 psi | 43% | 1250 fps | 89.2% |
| Alliant Green Dot² | <<locked>> | 60% | 31,038 psi | 69% | 1260 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 21,654 psi | 48% | 1211 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 29,718 psi | 66% | 1470 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 84% | 34,156 psi | 76% | 1627 fps | 86.7% |
| Alliant RED DOT² | <<locked>> | 60% | 30,240 psi | 67% | 1220 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 29,791 psi | 66% | 1355 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 30,980 psi | 69% | 1247 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 20,711 psi | 46% | 1099 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 34,316 psi | 76% | 1306 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,947 psi | 58% | 1106 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 80% | 25,425 psi | 57% | 1509 fps | 87.9% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 10,733 psi | 24% | 823 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 33,562 psi | 75% | 1345 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 32,779 psi | 73% | 1552 fps | 98% |
| Lovex D037.2*² | <<locked>> | 60% | 25,454 psi | 57% | 1414 fps | 90.1% |
| Lovex S020² | <<locked>> | 60% | 34,650 psi | 77% | 1378 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 26,963 psi | 60% | 1234 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 30,530 psi | 68% | 1276 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 30,066 psi | 67% | 1257 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 31,444 psi | 70% | 1257 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 33,968 psi | 76% | 1243 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 68% | 24,468 psi | 54% | 1421 fps | 87.7% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 9,950 psi | 22% | 827 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 29,022 psi | 65% | 1329 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 27,485 psi | 61% | 1440 fps | 97.6% |
| Rottweil P 806² | <<locked>> | 60% | 25,266 psi | 56% | 1388 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 25,454 psi | 57% | 1414 fps | 90.1% |
| Shooters World Major Pistol² | <<locked>> | 60% | 32,779 psi | 73% | 1552 fps | 98% |
| SNPE Vectan A0² | <<locked>> | 60% | 27,035 psi | 60% | 1273 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 32,474 psi | 72% | 1302 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 31,894 psi | 71% | 1316 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 34,127 psi | 76% | 1224 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 88% | 21,234 psi | 47% | 1342 fps | 87.4% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 24,207 psi | 54% | 1289 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 31,560 psi | 70% | 1312 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 34,577 psi | 77% | 1542 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 33,837 psi | 75% | 1407 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 30,211 psi | 67% | 1329 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 28,819 psi | 64% | 1381 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 19,870 psi | 44% | 1263 fps | 94.3% |
| Vihtavuori N105² | <<locked>> | 60% | 17,448 psi | 39% | 1247 fps | 96% |
| Vihtavuori N110* | <<locked>> | 84% | 23,148 psi | 51% | 1411 fps | 86.1% |
| Vihtavuori N320² | <<locked>> | 60% | 34,330 psi | 76% | 1296 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 17,898 psi | 40% | 974 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 34,621 psi | 77% | 1352 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 30,153 psi | 67% | 1332 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 24,889 psi | 55% | 1309 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 28,224 psi | 63% | 1273 fps | 100% |
* 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 63 powders for .357 Maximum loaded with the .357 | 158gr | Norma SPFN. Hodgdon LilGun delivers the highest muzzle velocity at 1,762 fps; across all powders the maximum-charge window runs from 1,086 fps to 1,762 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 17 of the 63 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 47–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, SNPE Vectan BA6 1/2 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. As outliers, Accurate 4100, Alliant 2400, Alliant Power Pro 300-MP burn incompletely and react more sensitively to barrel length and temperature. Baschieri & Pellagri 102 Pistol, Hodgdon Clays, 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.