Load Specifications
Load data in caliber .357 Maximum with .357 | 158gr | X-TREME RNFP bullet and 61 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>> | 80% | 36,274 psi | 81% | 1614 fps | 90.5% |
| Accurate No. 2² | <<locked>> | 64% | 38,667 psi | 86% | 1440 fps | 100% |
| Accurate No. 9² | <<locked>> | 68% | 36,114 psi | 80% | 1598 fps | 95.5% |
| Accurate Solo 1000² | <<locked>> | 68% | 39,131 psi | 87% | 1342 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 68% | 37,101 psi | 83% | 1368 fps | 100% |
| Accurate TCM² | <<locked>> | 68% | 35,882 psi | 80% | 1588 fps | 96.4% |
| ADI AP 100 | <<locked>> | 84% | 40,524 psi | 90% | 1581 fps | 100% |
| ADI APS 350² | <<locked>> | 68% | 38,450 psi | 86% | 1243 fps | 100% |
| ADI APS 450² | <<locked>> | 68% | 37,536 psi | 83% | 1263 fps | 100% |
| ADI AS 30² | <<locked>> | 68% | 38,537 psi | 86% | 1302 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 38,769 psi | 86% | 1348 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 40,176 psi | 89% | 1686 fps | 94.8% |
| Alliant BE-86² | <<locked>> | 68% | 38,899 psi | 87% | 1375 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 80% | 37,173 psi | 83% | 1608 fps | 98.5% |
| Alliant Green Dot² | <<locked>> | 68% | 39,595 psi | 88% | 1362 fps | 100% |
| Alliant Herco | <<locked>> | 80% | 37,826 psi | 84% | 1453 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 40,306 psi | 90% | 1627 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 84% | 37,449 psi | 83% | 1670 fps | 88.5% |
| Alliant RED DOT² | <<locked>> | 68% | 37,666 psi | 84% | 1309 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 68% | 38,783 psi | 86% | 1467 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 39,508 psi | 88% | 1345 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 39,436 psi | 88% | 1352 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 40,451 psi | 90% | 1368 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 40,640 psi | 90% | 1296 fps | 100% |
| Hodgdon H110* | <<locked>> | 84% | 38,725 psi | 86% | 1693 fps | 88.1% |
| Hodgdon LilGun* | <<locked>> | 88% | 37,333 psi | 83% | 1722 fps | 94.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 24,497 psi | 54% | 1099 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 39,856 psi | 89% | 1414 fps | 100% |
| Lovex D037.2² | <<locked>> | 68% | 36,579 psi | 81% | 1608 fps | 95.7% |
| Maxam CSB 1² | <<locked>> | 72% | 38,377 psi | 85% | 1378 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 39,421 psi | 88% | 1378 fps | 100% |
| Maxam CSB 3² | <<locked>> | 68% | 38,348 psi | 85% | 1358 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 39,943 psi | 89% | 1355 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 38,595 psi | 86% | 1293 fps | 100% |
| Ramshot Enforcer | <<locked>> | 80% | 40,074 psi | 89% | 1693 fps | 95.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 23,264 psi | 52% | 1112 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 68% | 37,840 psi | 84% | 1440 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 68% | 38,145 psi | 85% | 1611 fps | 99.8% |
| ReloadSwiss RS 30*ᴾ | <<locked>> | 100% | 33,504 psi | 75% | 1624 fps | 88.6% |
| Rottweil P 806² | <<locked>> | 68% | 36,956 psi | 82% | 1555 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 68% | 36,579 psi | 81% | 1608 fps | 95.7% |
| SNPE Vectan A0² | <<locked>> | 72% | 39,059 psi | 87% | 1430 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 64% | 37,144 psi | 83% | 1358 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 64% | 36,593 psi | 81% | 1371 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 64% | 38,189 psi | 85% | 1270 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 32,082 psi | 71% | 1555 fps | 94.8% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 39,552 psi | 88% | 1509 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 40,408 psi | 90% | 1417 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 39,726 psi | 88% | 1476 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 39,494 psi | 88% | 1447 fps | 100% |
| Somchem S265* | <<locked>> | 96% | 39,334 psi | 87% | 1627 fps | 87.2% |
| Vihtavuori 3N37² | <<locked>> | 68% | 38,783 psi | 86% | 1512 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 80% | 39,305 psi | 87% | 1608 fps | 100% |
| Vihtavuori N105 | <<locked>> | 80% | 37,086 psi | 82% | 1604 fps | 100% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 40,538 psi | 90% | 1709 fps | 95.5% |
| Vihtavuori N320² | <<locked>> | 64% | 40,161 psi | 89% | 1355 fps | 100% |
| Vihtavuori N32C Tin Star | <<locked>> | 96% | 39,088 psi | 87% | 1266 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 40,422 psi | 90% | 1414 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 39,813 psi | 89% | 1450 fps | 100% |
| Vihtavuori N350² | <<locked>> | 72% | 37,753 psi | 84% | 1493 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 68% | 37,159 psi | 83% | 1385 fps | 100% |
Start Load - Barrel Length: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4100*² | <<locked>> | 72% | 27,949 psi | 62% | 1467 fps | 85.8% |
| Accurate No. 2² | <<locked>> | 60% | 33,779 psi | 75% | 1381 fps | 100% |
| Accurate No. 9*² | <<locked>> | 60% | 27,151 psi | 60% | 1437 fps | 91.3% |
| Accurate Solo 1000² | <<locked>> | 60% | 32,706 psi | 73% | 1260 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 30,342 psi | 67% | 1280 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 27,340 psi | 61% | 1437 fps | 92.6% |
| ADI AP 100² | <<locked>> | 60% | 21,654 psi | 48% | 1263 fps | 99% |
| ADI APS 350² | <<locked>> | 60% | 31,836 psi | 71% | 1158 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 31,415 psi | 70% | 1181 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 32,068 psi | 71% | 1220 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 35,505 psi | 79% | 1306 fps | 100% |
| Alliant 2400*² | <<locked>> | 64% | 24,526 psi | 55% | 1398 fps | 86.5% |
| Alliant BE-86² | <<locked>> | 60% | 31,096 psi | 69% | 1276 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 21,089 psi | 47% | 1289 fps | 91.1% |
| Alliant Green Dot² | <<locked>> | 60% | 32,561 psi | 72% | 1270 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 23,453 psi | 52% | 1230 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 31,502 psi | 70% | 1490 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 80% | 32,996 psi | 73% | 1594 fps | 86.1% |
| Alliant RED DOT² | <<locked>> | 60% | 31,154 psi | 69% | 1224 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 31,705 psi | 71% | 1368 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 32,489 psi | 72% | 1257 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 22,394 psi | 50% | 1115 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 35,795 psi | 80% | 1316 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 26,426 psi | 59% | 1106 fps | 100% |
| Hodgdon H110* | <<locked>> | 80% | 34,113 psi | 76% | 1617 fps | 85.8% |
| Hodgdon LilGun*² | <<locked>> | 76% | 24,831 psi | 55% | 1486 fps | 87.5% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 12,067 psi | 27% | 837 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 35,433 psi | 79% | 1358 fps | 100% |
| Lovex D037.2*² | <<locked>> | 60% | 27,949 psi | 62% | 1453 fps | 91.8% |
| Maxam CSB 1² | <<locked>> | 60% | 28,543 psi | 63% | 1247 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 32,039 psi | 71% | 1286 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 31,560 psi | 70% | 1270 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 32,866 psi | 73% | 1266 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 35,230 psi | 78% | 1253 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 64% | 23,496 psi | 52% | 1385 fps | 87% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 11,676 psi | 26% | 850 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 30,269 psi | 67% | 1339 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 29,341 psi | 65% | 1463 fps | 98.3% |
| ReloadSwiss RS 30* | <<locked>> | 96% | 30,313 psi | 67% | 1562 fps | 86.5% |
| Rottweil P 806² | <<locked>> | 60% | 28,282 psi | 63% | 1424 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 27,949 psi | 62% | 1453 fps | 91.8% |
| SNPE Vectan A0² | <<locked>> | 60% | 28,471 psi | 63% | 1286 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 33,750 psi | 75% | 1316 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 33,243 psi | 74% | 1329 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 34,418 psi | 77% | 1224 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 80% | 19,102 psi | 42% | 1273 fps | 85.4% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 25,817 psi | 57% | 1306 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 33,127 psi | 74% | 1325 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 35,534 psi | 79% | 1421 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 31,778 psi | 71% | 1345 fps | 100% |
| Somchem S265* | <<locked>> | 92% | 35,679 psi | 79% | 1568 fps | 85.4% |
| Vihtavuori 3N37² | <<locked>> | 60% | 30,690 psi | 68% | 1401 fps | 100% |
| Vihtavuori 3N38² | <<locked>> | 60% | 21,857 psi | 49% | 1296 fps | 95.7% |
| Vihtavuori N105² | <<locked>> | 60% | 19,754 psi | 44% | 1289 fps | 97.7% |
| Vihtavuori N110* | <<locked>> | 80% | 22,785 psi | 51% | 1388 fps | 85.9% |
| Vihtavuori N320² | <<locked>> | 60% | 35,998 psi | 80% | 1306 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 19,276 psi | 43% | 984 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 36,434 psi | 81% | 1365 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 31,850 psi | 71% | 1348 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 26,672 psi | 59% | 1332 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 29,950 psi | 67% | 1289 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 61 powders for .357 Maximum loaded with the .357 | 158gr | X-TREME RNFP. Hodgdon LilGun delivers the highest muzzle velocity at 1,722 fps; across all powders the maximum-charge window runs from 1,099 fps to 1,722 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 20 of the 61 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 52–90 %, 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.