Load Specifications
Load data in caliber .357 Maximum with .356 | 122gr | Rim Rock TC bullet and 63 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 4100* | <<locked>> | 88% | 39,349 psi | 88% | 1900 fps | 87.8% |
| Accurate No. 2² | <<locked>> | 68% | 38,928 psi | 87% | 1703 fps | 100% |
| Accurate No. 7² | <<locked>> | 68% | 39,914 psi | 89% | 1909 fps | 97.7% |
| Accurate No. 9*² | <<locked>> | 76% | 40,335 psi | 90% | 1909 fps | 93.9% |
| Accurate Solo 1000² | <<locked>> | 72% | 39,784 psi | 88% | 1591 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 37,478 psi | 83% | 1624 fps | 100% |
| Accurate TCM*² | <<locked>> | 76% | 40,161 psi | 89% | 1903 fps | 94.9% |
| ADI AP 100 | <<locked>> | 88% | 39,726 psi | 88% | 1834 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 39,726 psi | 88% | 1480 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 38,609 psi | 86% | 1499 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 38,856 psi | 86% | 1545 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 38,914 psi | 87% | 1594 fps | 100% |
| Alliant 2400* | <<locked>> | 84% | 37,942 psi | 84% | 1896 fps | 90.3% |
| Alliant BE-86² | <<locked>> | 72% | 38,957 psi | 87% | 1621 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 88% | 39,581 psi | 88% | 1900 fps | 96.9% |
| Alliant BULLSEYE² | <<locked>> | 64% | 38,203 psi | 85% | 1722 fps | 100% |
| Alliant Green Dot² | <<locked>> | 72% | 39,595 psi | 88% | 1608 fps | 100% |
| Alliant Herco | <<locked>> | 88% | 40,364 psi | 90% | 1745 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 72% | 39,349 psi | 88% | 1883 fps | 100% |
| Alliant RED DOT² | <<locked>> | 72% | 37,434 psi | 83% | 1549 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 38,363 psi | 85% | 1726 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 72% | 40,364 psi | 90% | 1598 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 88% | 39,305 psi | 87% | 1588 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 36,361 psi | 81% | 1558 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 38,261 psi | 85% | 1490 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 96% | 40,001 psi | 89% | 2011 fps | 92.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 21,408 psi | 48% | 1253 fps | 100% |
| Hodgdon Universal² | <<locked>> | 68% | 39,131 psi | 87% | 1663 fps | 100% |
| Lovex D037.1² | <<locked>> | 68% | 39,914 psi | 89% | 1909 fps | 97.7% |
| Lovex D037.2*² | <<locked>> | 72% | 35,636 psi | 79% | 1831 fps | 92% |
| Lovex S020² | <<locked>> | 64% | 36,709 psi | 82% | 1650 fps | 100% |
| Maxam CSB 1² | <<locked>> | 76% | 38,276 psi | 85% | 1627 fps | 100% |
| Maxam CSB 2² | <<locked>> | 72% | 38,972 psi | 87% | 1631 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 38,029 psi | 85% | 1598 fps | 100% |
| Maxam CSB 4² | <<locked>> | 72% | 40,103 psi | 89% | 1604 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 39,233 psi | 87% | 1535 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 84% | 38,029 psi | 85% | 1903 fps | 91.5% |
| ReloadSwiss RS 12² | <<locked>> | 64% | 40,205 psi | 89% | 1627 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 19,841 psi | 44% | 1263 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 37,681 psi | 84% | 1696 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 37,115 psi | 83% | 1850 fps | 98.4% |
| Rottweil P 806² | <<locked>> | 76% | 39,044 psi | 87% | 1850 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 72% | 35,636 psi | 79% | 1831 fps | 92% |
| Shooters World Major Pistol² | <<locked>> | 68% | 39,914 psi | 89% | 1909 fps | 97.7% |
| SNPE Vectan A0² | <<locked>> | 76% | 38,856 psi | 86% | 1683 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 38,174 psi | 85% | 1611 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 37,507 psi | 83% | 1627 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 39,204 psi | 87% | 1506 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 80% | 38,769 psi | 86% | 1759 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 36,738 psi | 82% | 1621 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 35,766 psi | 80% | 1818 fps | 100% |
| Somchem MP200² | <<locked>> | 68% | 39,508 psi | 88% | 1736 fps | 100% |
| Somchem MS200² | <<locked>> | 72% | 38,899 psi | 87% | 1696 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 72% | 38,043 psi | 85% | 1765 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 84% | 37,202 psi | 83% | 1834 fps | 98.9% |
| Vihtavuori N105 | <<locked>> | 88% | 38,450 psi | 86% | 1893 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 33,054 psi | 74% | 1827 fps | 88.5% |
| Vihtavuori N320² | <<locked>> | 68% | 39,943 psi | 89% | 1601 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 38,406 psi | 85% | 1490 fps | 100% |
| Vihtavuori N330² | <<locked>> | 68% | 40,654 psi | 90% | 1673 fps | 100% |
| Vihtavuori N340² | <<locked>> | 72% | 39,436 psi | 88% | 1706 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 36,912 psi | 82% | 1742 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 36,767 psi | 82% | 1627 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* | <<locked>> | 84% | 34,345 psi | 76% | 1811 fps | 85.3% |
| Accurate No. 2² | <<locked>> | 60% | 30,255 psi | 67% | 1572 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 29,501 psi | 66% | 1716 fps | 93.9% |
| Accurate No. 9*² | <<locked>> | 64% | 26,150 psi | 58% | 1631 fps | 86.4% |
| Accurate Solo 1000² | <<locked>> | 60% | 29,936 psi | 67% | 1447 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 27,064 psi | 60% | 1463 fps | 100% |
| Accurate TCM*² | <<locked>> | 64% | 26,295 psi | 58% | 1634 fps | 87.9% |
| ADI AP 100*² | 11 gr | 60% | 18,333 psi | 41% | 1381 fps | 94.6% |
| ADI APS 350² | <<locked>> | 60% | 30,081 psi | 67% | 1339 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 29,138 psi | 65% | 1355 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 29,008 psi | 65% | 1398 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 31,923 psi | 71% | 1493 fps | 100% |
| Alliant 2400*² | <<locked>> | 76% | 29,530 psi | 66% | 1729 fps | 85.6% |
| Alliant BE-86² | <<locked>> | 60% | 27,514 psi | 61% | 1453 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 64% | 19,812 psi | 44% | 1457 fps | 85.5% |
| Alliant BULLSEYE² | <<locked>> | 60% | 34,084 psi | 76% | 1660 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 29,399 psi | 65% | 1457 fps | 100% |
| Alliant Herco² | 10 gr | 60% | 20,030 psi | 45% | 1378 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 27,369 psi | 61% | 1654 fps | 98.5% |
| Alliant RED DOT² | <<locked>> | 60% | 28,674 psi | 64% | 1411 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 27,485 psi | 61% | 1545 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 29,399 psi | 65% | 1444 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 19,508 psi | 43% | 1270 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 32,314 psi | 72% | 1503 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 24,555 psi | 55% | 1273 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 88% | 29,515 psi | 66% | 1808 fps | 86.2% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 9,863 psi | 22% | 945 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 31,865 psi | 71% | 1552 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 29,501 psi | 66% | 1716 fps | 93.9% |
| Lovex D037.2*² | <<locked>> | 64% | 26,861 psi | 60% | 1647 fps | 86.9% |
| Lovex S020² | <<locked>> | 60% | 32,126 psi | 71% | 1585 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 25,382 psi | 56% | 1424 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 27,978 psi | 62% | 1463 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 28,152 psi | 63% | 1447 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 29,718 psi | 66% | 1450 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 32,576 psi | 72% | 1440 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 76% | 28,732 psi | 64% | 1726 fps | 86.5% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 36,013 psi | 80% | 1572 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 9,326 psi | 21% | 951 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 26,295 psi | 58% | 1516 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 24,860 psi | 55% | 1594 fps | 93.3% |
| Rottweil P 806² | <<locked>> | 60% | 22,524 psi | 50% | 1549 fps | 99.7% |
| Shooters World Heavy Pistol*² | <<locked>> | 64% | 26,861 psi | 60% | 1647 fps | 86.9% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 29,501 psi | 66% | 1716 fps | 93.9% |
| SNPE Vectan A0² | <<locked>> | 60% | 25,048 psi | 56% | 1457 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 30,560 psi | 68% | 1499 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 29,863 psi | 66% | 1516 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 32,343 psi | 72% | 1407 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 22,046 psi | 49% | 1450 fps | 99.7% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 29,370 psi | 65% | 1506 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 31,343 psi | 70% | 1736 fps | 99.9% |
| Somchem MP200² | <<locked>> | 60% | 31,575 psi | 70% | 1614 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 27,963 psi | 62% | 1522 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 26,223 psi | 58% | 1562 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 17,999 psi | 40% | 1398 fps | 88.6% |
| Vihtavuori N105*² | 12.5 gr | 60% | 15,127 psi | 34% | 1358 fps | 89.6% |
| Vihtavuori N110* | <<locked>> | 96% | 29,269 psi | 65% | 1752 fps | 86.2% |
| Vihtavuori N320² | <<locked>> | 60% | 32,547 psi | 72% | 1499 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 16,636 psi | 37% | 1125 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 32,285 psi | 72% | 1558 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 28,065 psi | 62% | 1529 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 22,945 psi | 51% | 1486 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 26,643 psi | 59% | 1467 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 63 powders for .357 Maximum loaded with the .356 | 122gr | Rim Rock TC. Hodgdon LilGun delivers the highest muzzle velocity at 2,011 fps; across all powders the maximum-charge window runs from 1,253 fps to 2,011 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 16 of the 63 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 44–90 %, 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 | 122gr | Rim Rock TC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4100, Accurate No. 9, Accurate TCM burn incompletely and react more sensitively to barrel length and temperature. Hodgdon TrailBoss, ReloadSwiss RS 14 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.