Load Specifications
Load data in caliber .357 Maximum with .357 | 170gr | Sierra JHC SportsMaster bullet and 66 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N32C Tin Star, ReloadSwiss RS 14 and Hodgdon TrailBoss.
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% | 37,855 psi | 84% | 1572 fps | 91.7% |
| Accurate No. 2² | <<locked>> | 64% | 36,840 psi | 82% | 1348 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 37,898 psi | 84% | 1552 fps | 99.4% |
| Accurate No. 9² | <<locked>> | 72% | 38,087 psi | 85% | 1562 fps | 96.6% |
| Accurate Solo 1000² | <<locked>> | 68% | 37,811 psi | 84% | 1257 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 39,349 psi | 88% | 1325 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 38,377 psi | 85% | 1558 fps | 97.5% |
| ADI AP 100 | <<locked>> | 84% | 38,435 psi | 85% | 1480 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 40,538 psi | 90% | 1198 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 39,813 psi | 89% | 1220 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 40,335 psi | 90% | 1257 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 37,666 psi | 84% | 1270 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 36,840 psi | 82% | 1568 fps | 94% |
| Alliant BE-86² | <<locked>> | 68% | 36,854 psi | 82% | 1286 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 38,232 psi | 85% | 1552 fps | 99% |
| Alliant BULLSEYE² | <<locked>> | 64% | 40,654 psi | 90% | 1417 fps | 100% |
| Alliant Green Dot² | <<locked>> | 68% | 37,913 psi | 84% | 1276 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 39,595 psi | 88% | 1404 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 37,579 psi | 84% | 1516 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 88% | 38,624 psi | 86% | 1624 fps | 89.6% |
| Alliant RED DOT² | <<locked>> | 72% | 39,189 psi | 87% | 1263 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 68% | 36,709 psi | 82% | 1375 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 38,247 psi | 85% | 1263 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 37,710 psi | 84% | 1266 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 38,363 psi | 85% | 1283 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 39,740 psi | 88% | 1217 fps | 100% |
| Hodgdon H110* | <<locked>> | 88% | 40,016 psi | 89% | 1644 fps | 89.3% |
| Hodgdon LilGun | <<locked>> | 92% | 39,073 psi | 87% | 1680 fps | 95.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 22,829 psi | 51% | 1027 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 37,536 psi | 83% | 1319 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 37,898 psi | 84% | 1552 fps | 99.4% |
| Lovex D037.2² | <<locked>> | 72% | 39,276 psi | 87% | 1578 fps | 96.9% |
| Lovex S020² | <<locked>> | 64% | 39,349 psi | 88% | 1358 fps | 100% |
| Maxam CSB 1² | <<locked>> | 72% | 36,535 psi | 81% | 1289 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 37,623 psi | 84% | 1296 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 40,524 psi | 90% | 1312 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 38,493 psi | 86% | 1273 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 37,507 psi | 83% | 1214 fps | 100% |
| Ramshot Enforcer | <<locked>> | 80% | 36,535 psi | 81% | 1572 fps | 95% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 21,379 psi | 48% | 1040 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 40,306 psi | 90% | 1398 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 40,292 psi | 90% | 1565 fps | 100% |
| Rottweil P 806² | <<locked>> | 72% | 37,507 psi | 83% | 1499 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 39,276 psi | 87% | 1578 fps | 96.9% |
| Shooters World Major Pistol² | <<locked>> | 64% | 37,898 psi | 84% | 1552 fps | 99.4% |
| SNPE Vectan A0² | <<locked>> | 72% | 37,173 psi | 83% | 1339 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 39,711 psi | 88% | 1319 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 39,175 psi | 87% | 1332 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 40,538 psi | 90% | 1227 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 29,196 psi | 65% | 1444 fps | 93.9% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 37,275 psi | 83% | 1411 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 38,740 psi | 86% | 1329 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 39,160 psi | 87% | 1522 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 37,608 psi | 84% | 1381 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 37,231 psi | 83% | 1352 fps | 100% |
| Somchem S265*ᴾ | <<locked>> | 100% | 40,103 psi | 89% | 1572 fps | 88% |
| Vihtavuori 3N37² | <<locked>> | 68% | 36,593 psi | 81% | 1414 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 80% | 36,114 psi | 80% | 1496 fps | 99.9% |
| Vihtavuori N105 | <<locked>> | 84% | 37,695 psi | 84% | 1542 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 37,275 psi | 83% | 1594 fps | 94.9% |
| Vihtavuori N320² | <<locked>> | 64% | 38,377 psi | 85% | 1270 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 39,987 psi | 89% | 1214 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 38,377 psi | 85% | 1322 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 37,536 psi | 83% | 1355 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 40,118 psi | 89% | 1450 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 38,899 psi | 87% | 1339 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4100*² | <<locked>> | 76% | 28,950 psi | 64% | 1427 fps | 87.1% |
| Accurate No. 2² | <<locked>> | 60% | 32,343 psi | 72% | 1296 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 32,387 psi | 72% | 1470 fps | 98.3% |
| Accurate No. 9*² | <<locked>> | 60% | 24,714 psi | 55% | 1332 fps | 90.3% |
| Accurate Solo 1000² | <<locked>> | 60% | 31,517 psi | 70% | 1181 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 28,384 psi | 63% | 1194 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 24,831 psi | 55% | 1329 fps | 91.6% |
| ADI AP 100² | <<locked>> | 60% | 20,117 psi | 45% | 1178 fps | 98.7% |
| ADI APS 350² | <<locked>> | 60% | 31,691 psi | 70% | 1096 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 30,255 psi | 67% | 1106 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 30,995 psi | 69% | 1145 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 33,446 psi | 74% | 1217 fps | 100% |
| Alliant 2400*² | <<locked>> | 68% | 25,106 psi | 56% | 1358 fps | 87.6% |
| Alliant BE-86² | <<locked>> | 60% | 29,617 psi | 66% | 1201 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 18,956 psi | 42% | 1188 fps | 89.8% |
| Alliant BULLSEYE² | <<locked>> | 60% | 36,245 psi | 81% | 1365 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 31,009 psi | 69% | 1191 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 21,495 psi | 48% | 1145 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 29,341 psi | 65% | 1391 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 84% | 33,388 psi | 74% | 1542 fps | 87% |
| Alliant RED DOT² | <<locked>> | 60% | 29,820 psi | 66% | 1148 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 29,718 psi | 66% | 1280 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 30,618 psi | 68% | 1175 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 20,813 psi | 46% | 1043 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 33,910 psi | 75% | 1234 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 26,078 psi | 58% | 1043 fps | 100% |
| Hodgdon H110* | <<locked>> | 84% | 34,621 psi | 77% | 1565 fps | 86.8% |
| Hodgdon LilGun*² | <<locked>> | 76% | 21,756 psi | 48% | 1362 fps | 85.5% |
| Hodgdon TrailBoss² | 4.5 gr | 60% | 10,602 psi | 24% | 778 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 33,475 psi | 74% | 1270 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 32,387 psi | 72% | 1470 fps | 98.3% |
| Lovex D037.2*² | <<locked>> | 60% | 25,121 psi | 56% | 1342 fps | 90.6% |
| Lovex S020² | <<locked>> | 60% | 34,214 psi | 76% | 1299 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 27,122 psi | 60% | 1168 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 30,240 psi | 67% | 1204 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 29,588 psi | 66% | 1181 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 31,488 psi | 70% | 1188 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 33,837 psi | 75% | 1171 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 64% | 20,827 psi | 46% | 1276 fps | 85.4% |
| ReloadSwiss RS 14² | 4.6 gr | 60% | 10,124 psi | 23% | 787 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 28,485 psi | 63% | 1253 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 27,209 psi | 61% | 1365 fps | 97.9% |
| Rottweil P 806² | <<locked>> | 60% | 25,005 psi | 56% | 1319 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 25,121 psi | 56% | 1342 fps | 90.6% |
| Shooters World Major Pistol² | <<locked>> | 60% | 32,387 psi | 72% | 1470 fps | 98.3% |
| SNPE Vectan A0² | <<locked>> | 60% | 26,934 psi | 60% | 1204 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 32,140 psi | 71% | 1230 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 31,575 psi | 70% | 1240 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 33,533 psi | 75% | 1148 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 84% | 18,942 psi | 42% | 1224 fps | 85.9% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 23,656 psi | 53% | 1214 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 31,473 psi | 70% | 1240 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 34,055 psi | 76% | 1457 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 33,765 psi | 75% | 1332 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 30,182 psi | 67% | 1260 fps | 100% |
| Somchem S265* | <<locked>> | 96% | 35,882 psi | 80% | 1509 fps | 86.1% |
| Vihtavuori 3N37² | <<locked>> | 60% | 28,456 psi | 63% | 1306 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 19,595 psi | 44% | 1194 fps | 94.7% |
| Vihtavuori N105² | <<locked>> | 60% | 17,129 psi | 38% | 1181 fps | 96.5% |
| Vihtavuori N110* | <<locked>> | 84% | 22,481 psi | 50% | 1332 fps | 86.4% |
| Vihtavuori N320² | <<locked>> | 60% | 33,924 psi | 75% | 1217 fps | 100% |
| Vihtavuori N32C Tin Star² | 6.1 gr | 60% | 17,883 psi | 40% | 922 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 34,040 psi | 76% | 1273 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 29,660 psi | 66% | 1253 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 24,656 psi | 55% | 1240 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 28,442 psi | 63% | 1211 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 66 powders for .357 Maximum loaded with the .357 | 170gr | Sierra JHC SportsMaster. Hodgdon LilGun delivers the highest muzzle velocity at 1,680 fps; across all powders the maximum-charge window runs from 1,027 fps to 1,680 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 19 of the 66 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, 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. Vihtavuori N32C Tin Star, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for .357 Maximum with the .357 | 170gr | Sierra JHC SportsMaster they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4100, Alliant 2400, Alliant Power Pro 300-MP burn incompletely and react more sensitively to barrel length and temperature. ADI APS 350, ADI APS 450, Baschieri & Pellagri 102 Pistol 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.