Load Specifications
Load data in caliber .357 Maximum with .356 | 135gr | X-TREME RNFP bullet and 62 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% | 39,566 psi | 88% | 1811 fps | 89.8% |
| Accurate No. 2² | <<locked>> | 64% | 37,318 psi | 83% | 1581 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 39,160 psi | 87% | 1795 fps | 98.5% |
| Accurate No. 9² | <<locked>> | 72% | 39,262 psi | 87% | 1798 fps | 95% |
| Accurate Solo 1000² | <<locked>> | 68% | 38,232 psi | 85% | 1476 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 40,466 psi | 90% | 1562 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 39,334 psi | 87% | 1795 fps | 96% |
| ADI AP 100 | <<locked>> | 84% | 39,421 psi | 88% | 1726 fps | 100% |
| ADI APS 350² | <<locked>> | 68% | 37,884 psi | 84% | 1368 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 40,132 psi | 89% | 1430 fps | 100% |
| ADI AS 30² | <<locked>> | 68% | 38,043 psi | 85% | 1437 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 37,869 psi | 84% | 1483 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 38,218 psi | 85% | 1804 fps | 92.1% |
| Alliant BE-86² | <<locked>> | 68% | 37,739 psi | 84% | 1509 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 39,421 psi | 88% | 1795 fps | 98% |
| Alliant Green Dot² | <<locked>> | 68% | 38,566 psi | 86% | 1496 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 40,422 psi | 90% | 1637 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 38,493 psi | 86% | 1762 fps | 100% |
| Alliant RED DOT² | <<locked>> | 72% | 40,422 psi | 90% | 1490 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 68% | 37,913 psi | 84% | 1614 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 38,725 psi | 86% | 1480 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 38,667 psi | 86% | 1483 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 39,450 psi | 88% | 1499 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 39,856 psi | 89% | 1424 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 88% | 35,375 psi | 79% | 1834 fps | 91.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 23,728 psi | 53% | 1207 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 38,261 psi | 85% | 1542 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 39,160 psi | 87% | 1795 fps | 98.5% |
| Lovex D037.2² | <<locked>> | 72% | 40,234 psi | 89% | 1811 fps | 95.3% |
| Lovex S020² | <<locked>> | 64% | 39,595 psi | 88% | 1585 fps | 100% |
| Maxam CSB 1² | <<locked>> | 72% | 37,231 psi | 83% | 1512 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 38,377 psi | 85% | 1516 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 40,669 psi | 90% | 1532 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 38,827 psi | 86% | 1490 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 38,159 psi | 85% | 1427 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 80% | 38,406 psi | 85% | 1814 fps | 93.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 22,872 psi | 51% | 1227 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 68% | 36,666 psi | 82% | 1578 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 68% | 36,593 psi | 81% | 1739 fps | 99% |
| Rottweil P 806² | <<locked>> | 72% | 39,972 psi | 89% | 1752 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 40,234 psi | 89% | 1811 fps | 95.3% |
| Shooters World Major Pistol² | <<locked>> | 64% | 39,160 psi | 87% | 1795 fps | 98.5% |
| SNPE Vectan A0² | <<locked>> | 72% | 37,942 psi | 84% | 1568 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 40,234 psi | 89% | 1542 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 39,668 psi | 88% | 1558 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 64% | 37,159 psi | 83% | 1391 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 30,371 psi | 68% | 1657 fps | 92% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 38,261 psi | 85% | 1647 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 39,653 psi | 88% | 1562 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 40,625 psi | 90% | 1778 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 38,493 psi | 86% | 1614 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 38,058 psi | 85% | 1581 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 68% | 37,188 psi | 83% | 1647 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 80% | 37,391 psi | 83% | 1736 fps | 99.5% |
| Vihtavuori N105 | <<locked>> | 84% | 39,189 psi | 87% | 1795 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 38,711 psi | 86% | 1834 fps | 93% |
| Vihtavuori N320² | <<locked>> | 64% | 38,943 psi | 87% | 1486 fps | 100% |
| Vihtavuori N32C Tin Star | <<locked>> | 96% | 38,595 psi | 86% | 1398 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 39,697 psi | 88% | 1555 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 38,682 psi | 86% | 1588 fps | 100% |
| Vihtavuori N350² | <<locked>> | 72% | 36,405 psi | 81% | 1631 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 40,118 psi | 89% | 1572 fps | 100% |
Start Load - Barrel Length: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4100* | <<locked>> | 80% | 34,722 psi | 77% | 1729 fps | 87.4% |
| Accurate No. 2² | <<locked>> | 60% | 32,996 psi | 73% | 1519 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 34,055 psi | 76% | 1706 fps | 97.2% |
| Accurate No. 9*² | <<locked>> | 60% | 26,092 psi | 58% | 1542 fps | 88.3% |
| Accurate Solo 1000² | <<locked>> | 60% | 31,879 psi | 71% | 1385 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 29,573 psi | 66% | 1407 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 26,078 psi | 58% | 1535 fps | 89.6% |
| ADI AP 100² | <<locked>> | 60% | 20,914 psi | 47% | 1368 fps | 97.6% |
| ADI APS 350² | <<locked>> | 60% | 31,865 psi | 71% | 1283 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 31,024 psi | 69% | 1302 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 31,575 psi | 70% | 1345 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 34,316 psi | 76% | 1434 fps | 100% |
| Alliant 2400*² | <<locked>> | 68% | 26,498 psi | 59% | 1568 fps | 85.5% |
| Alliant BE-86² | <<locked>> | 60% | 30,226 psi | 67% | 1401 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 20,378 psi | 45% | 1388 fps | 88.2% |
| Alliant Green Dot² | <<locked>> | 60% | 31,691 psi | 70% | 1398 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 22,684 psi | 50% | 1345 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 30,719 psi | 68% | 1624 fps | 99.8% |
| Alliant RED DOT² | <<locked>> | 60% | 30,792 psi | 68% | 1352 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 30,516 psi | 68% | 1496 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 31,807 psi | 71% | 1385 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 21,915 psi | 49% | 1227 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 35,273 psi | 78% | 1447 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 26,368 psi | 59% | 1224 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 80% | 26,803 psi | 60% | 1657 fps | 86.3% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 11,647 psi | 26% | 919 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 34,867 psi | 78% | 1496 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 34,055 psi | 76% | 1706 fps | 97.2% |
| Lovex D037.2*² | <<locked>> | 60% | 26,803 psi | 60% | 1558 fps | 88.8% |
| Lovex S020² | <<locked>> | 60% | 35,389 psi | 79% | 1526 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 27,862 psi | 62% | 1371 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 31,212 psi | 69% | 1414 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 30,516 psi | 68% | 1388 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 31,894 psi | 71% | 1391 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 34,548 psi | 77% | 1378 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 68% | 25,672 psi | 57% | 1562 fps | 86.2% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 11,240 psi | 25% | 932 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 29,370 psi | 65% | 1467 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 28,369 psi | 63% | 1585 fps | 96.6% |
| Rottweil P 806² | <<locked>> | 60% | 27,021 psi | 60% | 1542 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 26,803 psi | 60% | 1558 fps | 88.8% |
| Shooters World Major Pistol² | <<locked>> | 60% | 34,055 psi | 76% | 1706 fps | 97.2% |
| SNPE Vectan A0² | <<locked>> | 60% | 27,485 psi | 61% | 1407 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 32,895 psi | 73% | 1440 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 32,314 psi | 72% | 1457 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 34,301 psi | 76% | 1352 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 88% | 22,321 psi | 50% | 1473 fps | 85.9% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 24,743 psi | 55% | 1421 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 32,053 psi | 71% | 1453 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 35,868 psi | 80% | 1706 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 34,214 psi | 76% | 1552 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 30,647 psi | 68% | 1470 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 29,530 psi | 66% | 1526 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 21,176 psi | 47% | 1401 fps | 93.4% |
| Vihtavuori N105² | <<locked>> | 60% | 18,681 psi | 42% | 1381 fps | 95.3% |
| Vihtavuori N110* | <<locked>> | 88% | 27,325 psi | 61% | 1617 fps | 86.8% |
| Vihtavuori N320² | <<locked>> | 60% | 35,244 psi | 78% | 1437 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 18,811 psi | 42% | 1083 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 35,476 psi | 79% | 1499 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 31,009 psi | 69% | 1480 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 25,976 psi | 58% | 1457 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 29,037 psi | 65% | 1411 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 62 powders for .357 Maximum loaded with the .356 | 135gr | X-TREME RNFP. Hodgdon LilGun delivers the highest muzzle velocity at 1,834 fps; across all powders the maximum-charge window runs from 1,207 fps to 1,834 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 16 of the 62 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 51–90 %, 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, Hodgdon LilGun burn incompletely and react more sensitively to barrel length and temperature. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N32C Tin Star 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.