Load Specifications
Load data in caliber .357 Maximum with .356 | 125gr | Rim Rock CN bullet and 62 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N105, ADI AP 100 and Alliant Herco.
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 No. 2² | <<locked>> | 68% | 38,000 psi | 85% | 1654 fps | 100% |
| Accurate No. 7² | <<locked>> | 68% | 38,682 psi | 86% | 1857 fps | 97.4% |
| Accurate No. 9*² | <<locked>> | 76% | 38,580 psi | 86% | 1847 fps | 93.1% |
| Accurate Solo 1000² | <<locked>> | 72% | 39,233 psi | 87% | 1549 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 76% | 40,364 psi | 90% | 1624 fps | 100% |
| Accurate TCM*² | <<locked>> | 76% | 38,783 psi | 86% | 1844 fps | 94.3% |
| ADI AP 100 | <<locked>> | 88% | 38,319 psi | 85% | 1775 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 38,870 psi | 86% | 1430 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 38,043 psi | 85% | 1457 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 38,145 psi | 85% | 1499 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 38,319 psi | 85% | 1552 fps | 100% |
| Alliant 2400* | <<locked>> | 84% | 36,622 psi | 81% | 1841 fps | 89.6% |
| Alliant BE-86² | <<locked>> | 72% | 38,000 psi | 85% | 1578 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 88% | 38,319 psi | 85% | 1844 fps | 96.5% |
| Alliant BULLSEYE² | <<locked>> | 64% | 37,739 psi | 84% | 1683 fps | 100% |
| Alliant Green Dot² | <<locked>> | 72% | 39,059 psi | 87% | 1568 fps | 100% |
| Alliant Herco | <<locked>> | 88% | 39,697 psi | 88% | 1703 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 72% | 38,145 psi | 85% | 1827 fps | 100% |
| Alliant RED DOT² | <<locked>> | 76% | 40,524 psi | 90% | 1555 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 36,999 psi | 82% | 1673 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 72% | 39,407 psi | 88% | 1552 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 88% | 38,551 psi | 86% | 1545 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 68% | 39,929 psi | 89% | 1572 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 37,782 psi | 84% | 1450 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 96% | 37,449 psi | 83% | 1936 fps | 90.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 21,089 psi | 47% | 1220 fps | 100% |
| Hodgdon Universal² | <<locked>> | 68% | 38,769 psi | 86% | 1621 fps | 100% |
| Lovex D037.1² | <<locked>> | 68% | 38,682 psi | 86% | 1857 fps | 97.4% |
| Lovex D037.2*² | <<locked>> | 76% | 39,610 psi | 88% | 1864 fps | 93.5% |
| Lovex S020² | <<locked>> | 68% | 40,379 psi | 90% | 1663 fps | 100% |
| Maxam CSB 1² | <<locked>> | 76% | 37,478 psi | 83% | 1581 fps | 100% |
| Maxam CSB 2² | <<locked>> | 72% | 37,956 psi | 84% | 1581 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 37,565 psi | 84% | 1558 fps | 100% |
| Maxam CSB 4² | <<locked>> | 72% | 39,595 psi | 88% | 1562 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 39,131 psi | 87% | 1499 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 84% | 36,071 psi | 80% | 1837 fps | 90.6% |
| ReloadSwiss RS 12² | <<locked>> | 64% | 39,755 psi | 88% | 1588 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 19,522 psi | 43% | 1227 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 36,405 psi | 81% | 1647 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 35,998 psi | 80% | 1795 fps | 98% |
| Rottweil P 806² | <<locked>> | 76% | 37,898 psi | 84% | 1804 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 76% | 39,610 psi | 88% | 1864 fps | 93.5% |
| Shooters World Major Pistol² | <<locked>> | 68% | 38,682 psi | 86% | 1857 fps | 97.4% |
| SNPE Vectan A0² | <<locked>> | 76% | 37,753 psi | 84% | 1634 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 37,072 psi | 82% | 1565 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 72% | 40,451 psi | 90% | 1634 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 39,291 psi | 87% | 1473 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 80% | 37,797 psi | 84% | 1709 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 72% | 40,059 psi | 89% | 1631 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 68% | 40,074 psi | 89% | 1847 fps | 100% |
| Somchem MP200² | <<locked>> | 68% | 39,030 psi | 87% | 1693 fps | 100% |
| Somchem MS200² | <<locked>> | 72% | 38,218 psi | 85% | 1654 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 72% | 36,869 psi | 82% | 1716 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 88% | 40,451 psi | 90% | 1850 fps | 99.3% |
| Vihtavuori N105 | <<locked>> | 88% | 37,188 psi | 83% | 1841 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 31,560 psi | 70% | 1768 fps | 87.6% |
| Vihtavuori N320² | <<locked>> | 68% | 39,407 psi | 88% | 1558 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 37,797 psi | 84% | 1447 fps | 100% |
| Vihtavuori N330² | <<locked>> | 68% | 39,784 psi | 88% | 1627 fps | 100% |
| Vihtavuori N340² | <<locked>> | 72% | 38,827 psi | 86% | 1660 fps | 100% |
| Vihtavuori N350 | <<locked>> | 80% | 40,263 psi | 90% | 1755 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 76% | 39,682 psi | 88% | 1634 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 No. 2² | <<locked>> | 60% | 29,660 psi | 66% | 1529 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 28,485 psi | 63% | 1663 fps | 93.4% |
| Accurate No. 9*² | <<locked>> | 64% | 25,019 psi | 56% | 1578 fps | 85.5% |
| Accurate Solo 1000² | <<locked>> | 60% | 28,979 psi | 64% | 1401 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 26,237 psi | 58% | 1414 fps | 100% |
| Accurate TCM*² | <<locked>> | 64% | 25,454 psi | 57% | 1585 fps | 87.3% |
| ADI AP 100*² | 10.4 gr | 60% | 17,956 psi | 40% | 1345 fps | 94.3% |
| ADI APS 350² | <<locked>> | 60% | 29,979 psi | 67% | 1306 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 29,211 psi | 65% | 1325 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 29,008 psi | 65% | 1365 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 31,604 psi | 70% | 1457 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 32,532 psi | 72% | 1762 fps | 87.4% |
| Alliant BE-86² | <<locked>> | 60% | 27,108 psi | 60% | 1417 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 68% | 21,683 psi | 48% | 1486 fps | 87.3% |
| Alliant BULLSEYE² | <<locked>> | 60% | 33,460 psi | 74% | 1614 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 28,964 psi | 64% | 1417 fps | 100% |
| Alliant Herco² | 9.4 gr | 60% | 19,479 psi | 43% | 1339 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 26,324 psi | 59% | 1601 fps | 98.2% |
| Alliant RED DOT² | <<locked>> | 60% | 28,021 psi | 62% | 1368 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 26,803 psi | 60% | 1503 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 28,587 psi | 64% | 1398 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 18,855 psi | 42% | 1230 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 31,662 psi | 70% | 1463 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 24,424 psi | 54% | 1243 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 92% | 32,576 psi | 72% | 1844 fps | 88.2% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 9,703 psi | 22% | 919 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 31,169 psi | 69% | 1509 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 28,485 psi | 63% | 1663 fps | 93.4% |
| Lovex D037.2*² | <<locked>> | 64% | 25,759 psi | 57% | 1591 fps | 86% |
| Lovex S020² | <<locked>> | 60% | 31,604 psi | 70% | 1542 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 24,598 psi | 55% | 1378 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 27,659 psi | 62% | 1430 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 27,818 psi | 62% | 1411 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 29,298 psi | 65% | 1414 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 32,111 psi | 71% | 1401 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 76% | 27,470 psi | 61% | 1663 fps | 85.5% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 35,418 psi | 79% | 1529 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 9,181 psi | 20% | 928 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 25,701 psi | 57% | 1473 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 24,192 psi | 54% | 1549 fps | 92.9% |
| Rottweil P 806² | <<locked>> | 60% | 21,712 psi | 48% | 1503 fps | 99.5% |
| Shooters World Heavy Pistol*² | <<locked>> | 64% | 25,759 psi | 57% | 1591 fps | 86% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 28,485 psi | 63% | 1663 fps | 93.4% |
| SNPE Vectan A0² | <<locked>> | 60% | 24,932 psi | 55% | 1424 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 29,704 psi | 66% | 1453 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 28,964 psi | 64% | 1467 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 32,039 psi | 71% | 1371 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 21,422 psi | 48% | 1407 fps | 99.5% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 28,747 psi | 64% | 1467 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 30,400 psi | 68% | 1686 fps | 99.9% |
| Somchem MP200² | <<locked>> | 60% | 30,777 psi | 68% | 1568 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 27,383 psi | 61% | 1483 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 25,570 psi | 57% | 1519 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 17,231 psi | 38% | 1348 fps | 87.9% |
| Vihtavuori N105*² | 11.8 gr | 60% | 14,620 psi | 33% | 1316 fps | 89% |
| Vihtavuori N110* | <<locked>> | 96% | 27,731 psi | 62% | 1690 fps | 85.1% |
| Vihtavuori N320² | <<locked>> | 60% | 31,647 psi | 70% | 1453 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 16,389 psi | 36% | 1096 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 31,125 psi | 69% | 1509 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 27,035 psi | 60% | 1480 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 22,162 psi | 49% | 1440 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 25,846 psi | 57% | 1424 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 62 powders for .357 Maximum loaded with the .356 | 125gr | Rim Rock CN. Hodgdon LilGun delivers the highest muzzle velocity at 1,936 fps; across all powders the maximum-charge window runs from 1,220 fps to 1,936 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 43–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N110 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 N105, ADI AP 100, Alliant Herco rank at the top here: for .357 Maximum with the .356 | 125gr | Rim Rock CN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 9, Accurate TCM, Alliant 2400 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.