Load Specifications
Load data in caliber .357 Maximum with .357 | 158gr | Sierra JSP FN bullet and 64 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% | 39,218 psi | 87% | 1673 fps | 91.9% |
| Accurate No. 2² | <<locked>> | 64% | 37,623 psi | 84% | 1440 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 39,044 psi | 87% | 1654 fps | 99.4% |
| Accurate No. 9² | <<locked>> | 72% | 39,494 psi | 88% | 1663 fps | 96.7% |
| Accurate Solo 1000² | <<locked>> | 68% | 38,479 psi | 86% | 1345 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 39,987 psi | 89% | 1414 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 39,450 psi | 88% | 1654 fps | 97.5% |
| ADI AP 100 | <<locked>> | 84% | 39,639 psi | 88% | 1581 fps | 100% |
| ADI APS 350² | <<locked>> | 68% | 37,420 psi | 83% | 1237 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 40,364 psi | 90% | 1302 fps | 100% |
| ADI AS 30² | <<locked>> | 68% | 37,652 psi | 84% | 1302 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 37,724 psi | 84% | 1345 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 37,739 psi | 84% | 1663 fps | 94% |
| Alliant BE-86² | <<locked>> | 68% | 37,536 psi | 83% | 1371 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 39,392 psi | 88% | 1654 fps | 99% |
| Alliant Green Dot² | <<locked>> | 68% | 38,537 psi | 86% | 1358 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 40,147 psi | 89% | 1493 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 38,769 psi | 86% | 1617 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 88% | 40,437 psi | 90% | 1729 fps | 89.9% |
| Alliant RED DOT² | <<locked>> | 72% | 40,132 psi | 89% | 1352 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 68% | 37,289 psi | 83% | 1463 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 38,522 psi | 86% | 1345 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 38,072 psi | 85% | 1345 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 39,059 psi | 87% | 1365 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 39,494 psi | 88% | 1289 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 88% | 34,983 psi | 78% | 1696 fps | 93.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 22,814 psi | 51% | 1089 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 37,797 psi | 84% | 1401 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 39,044 psi | 87% | 1654 fps | 99.4% |
| Lovex D037.2² | <<locked>> | 72% | 40,582 psi | 90% | 1680 fps | 97% |
| Lovex S020² | <<locked>> | 64% | 39,769 psi | 88% | 1444 fps | 100% |
| Maxam CSB 1² | <<locked>> | 72% | 37,246 psi | 83% | 1375 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 37,826 psi | 84% | 1375 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 40,669 psi | 90% | 1394 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 39,073 psi | 87% | 1355 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 37,869 psi | 84% | 1296 fps | 100% |
| Ramshot Enforcer | <<locked>> | 80% | 37,985 psi | 84% | 1673 fps | 95.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 21,741 psi | 48% | 1106 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 68% | 36,463 psi | 81% | 1434 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 68% | 36,376 psi | 81% | 1594 fps | 99.7% |
| ReloadSwiss RS 30*ᴾ | <<locked>> | 100% | 31,691 psi | 70% | 1604 fps | 87.7% |
| Rottweil P 806² | <<locked>> | 72% | 38,914 psi | 87% | 1594 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 40,582 psi | 90% | 1680 fps | 97% |
| Shooters World Major Pistol² | <<locked>> | 64% | 39,044 psi | 87% | 1654 fps | 99.4% |
| SNPE Vectan A0² | <<locked>> | 72% | 38,000 psi | 85% | 1430 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 40,350 psi | 90% | 1404 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 39,871 psi | 89% | 1421 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 64% | 37,753 psi | 84% | 1273 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 30,284 psi | 67% | 1535 fps | 94.1% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 38,116 psi | 85% | 1503 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 39,233 psi | 87% | 1414 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 40,161 psi | 89% | 1621 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 38,334 psi | 85% | 1470 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 38,305 psi | 85% | 1444 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 68% | 37,188 psi | 83% | 1503 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 80% | 37,347 psi | 83% | 1594 fps | 99.9% |
| Vihtavuori N105 | <<locked>> | 84% | 39,552 psi | 88% | 1647 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 38,334 psi | 85% | 1690 fps | 94.8% |
| Vihtavuori N320² | <<locked>> | 64% | 38,305 psi | 85% | 1345 fps | 100% |
| Vihtavuori N32C Tin Star | <<locked>> | 96% | 37,768 psi | 84% | 1263 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 39,059 psi | 87% | 1411 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 38,493 psi | 86% | 1447 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 40,582 psi | 90% | 1539 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 39,740 psi | 88% | 1427 fps | 100% |
Start Load - Barrel Length: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4100*² | <<locked>> | 76% | 29,907 psi | 67% | 1519 fps | 87.2% |
| Accurate No. 2² | <<locked>> | 60% | 32,779 psi | 73% | 1378 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 33,388 psi | 74% | 1565 fps | 98.3% |
| Accurate No. 9*² | <<locked>> | 60% | 25,570 psi | 57% | 1417 fps | 90.3% |
| Accurate Solo 1000² | <<locked>> | 60% | 31,444 psi | 70% | 1253 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 29,269 psi | 65% | 1276 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 25,440 psi | 57% | 1411 fps | 91.5% |
| ADI AP 100² | <<locked>> | 60% | 20,334 psi | 45% | 1247 fps | 98.6% |
| ADI APS 350² | <<locked>> | 60% | 31,517 psi | 70% | 1161 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 30,414 psi | 68% | 1175 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 31,183 psi | 69% | 1220 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 33,837 psi | 75% | 1296 fps | 100% |
| Alliant 2400*² | <<locked>> | 68% | 25,933 psi | 58% | 1444 fps | 87.6% |
| Alliant BE-86² | <<locked>> | 60% | 29,805 psi | 66% | 1273 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 19,319 psi | 43% | 1260 fps | 89.5% |
| Alliant Green Dot² | <<locked>> | 60% | 31,604 psi | 70% | 1270 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 22,002 psi | 49% | 1220 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 30,023 psi | 67% | 1480 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 84% | 34,896 psi | 78% | 1640 fps | 87.3% |
| Alliant RED DOT² | <<locked>> | 60% | 30,240 psi | 67% | 1224 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 30,269 psi | 67% | 1365 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 31,488 psi | 70% | 1257 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 21,089 psi | 47% | 1109 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 34,447 psi | 77% | 1312 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,962 psi | 58% | 1109 fps | 100% |
| Hodgdon LilGun*² | <<locked>> | 76% | 22,626 psi | 50% | 1444 fps | 85.4% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 10,559 psi | 23% | 820 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 34,040 psi | 76% | 1352 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 33,388 psi | 74% | 1565 fps | 98.3% |
| Lovex D037.2*² | <<locked>> | 60% | 25,947 psi | 58% | 1427 fps | 90.6% |
| Lovex S020² | <<locked>> | 60% | 35,085 psi | 78% | 1388 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 27,412 psi | 61% | 1243 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 30,472 psi | 68% | 1280 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 30,008 psi | 67% | 1260 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 32,010 psi | 71% | 1266 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 34,519 psi | 77% | 1253 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 64% | 21,524 psi | 48% | 1355 fps | 85.3% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 10,051 psi | 22% | 830 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 28,906 psi | 64% | 1332 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 27,688 psi | 62% | 1447 fps | 97.8% |
| ReloadSwiss RS 30* | <<locked>> | 96% | 28,543 psi | 63% | 1539 fps | 85.3% |
| Rottweil P 806² | <<locked>> | 60% | 25,831 psi | 57% | 1401 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 25,947 psi | 58% | 1427 fps | 90.6% |
| Shooters World Major Pistol² | <<locked>> | 60% | 33,388 psi | 74% | 1565 fps | 98.3% |
| SNPE Vectan A0² | <<locked>> | 60% | 27,470 psi | 61% | 1283 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 32,851 psi | 73% | 1312 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 32,256 psi | 72% | 1325 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 33,982 psi | 76% | 1224 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 84% | 19,290 psi | 43% | 1293 fps | 85.6% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 24,511 psi | 55% | 1296 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 31,981 psi | 71% | 1322 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 34,838 psi | 77% | 1549 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 34,214 psi | 76% | 1417 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 30,647 psi | 68% | 1342 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 29,138 psi | 65% | 1391 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 20,102 psi | 45% | 1273 fps | 94.6% |
| Vihtavuori N105² | <<locked>> | 60% | 17,753 psi | 39% | 1257 fps | 96.4% |
| Vihtavuori N110* | <<locked>> | 84% | 23,540 psi | 52% | 1421 fps | 86.5% |
| Vihtavuori N320² | <<locked>> | 60% | 34,896 psi | 78% | 1306 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 17,985 psi | 40% | 981 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 35,114 psi | 78% | 1362 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 30,574 psi | 68% | 1342 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 25,208 psi | 56% | 1319 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 28,543 psi | 63% | 1283 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 64 powders for .357 Maximum loaded with the .357 | 158gr | Sierra JSP FN. Alliant Power Pro 300-MP delivers the highest muzzle velocity at 1,729 fps; across all powders the maximum-charge window runs from 1,089 fps to 1,729 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 18 of the 64 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 48–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, ReloadSwiss RS 30 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.