Load Specifications
Load data in caliber .357 Maximum with .356 | 100gr | Rim Rock FP bullet and 64 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N105, Vihtavuori 3N38 and ADI AP 100.
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% | 35,839 psi | 80% | 1857 fps | 100% |
| Accurate No. 7*² | <<locked>> | 68% | 36,056 psi | 80% | 2028 fps | 94.2% |
| Accurate No. 9*² | <<locked>> | 76% | 35,998 psi | 80% | 2011 fps | 89% |
| Accurate Solo 1000² | <<locked>> | 72% | 37,869 psi | 84% | 1759 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 76% | 38,261 psi | 85% | 1834 fps | 100% |
| Accurate TCM*² | <<locked>> | 76% | 36,042 psi | 80% | 2011 fps | 90.4% |
| ADI AP 100 | <<locked>> | 92% | 39,813 psi | 89% | 2037 fps | 99.9% |
| ADI AP 70N² | <<locked>> | 64% | 39,755 psi | 88% | 1873 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 38,305 psi | 85% | 1637 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 40,292 psi | 90% | 1703 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 40,277 psi | 90% | 1752 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 36,883 psi | 82% | 1762 fps | 100% |
| Alliant BE-86² | <<locked>> | 76% | 40,103 psi | 89% | 1834 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 92% | 39,755 psi | 88% | 2090 fps | 94.7% |
| Alliant BULLSEYE² | <<locked>> | 68% | 39,537 psi | 88% | 1952 fps | 100% |
| Alliant Green Dot² | <<locked>> | 72% | 37,521 psi | 83% | 1775 fps | 100% |
| Alliant Herco | <<locked>> | 92% | 40,640 psi | 90% | 1952 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 76% | 40,611 psi | 90% | 2110 fps | 99.8% |
| Alliant RED DOT² | <<locked>> | 76% | 38,841 psi | 86% | 1762 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 40,205 psi | 89% | 1965 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 76% | 38,972 psi | 87% | 1942 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 72% | 37,869 psi | 84% | 1759 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 92% | 39,871 psi | 89% | 1785 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 68% | 38,189 psi | 85% | 1768 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 39,798 psi | 89% | 1690 fps | 100% |
| Hodgdon LilGun*ᴾ | <<locked>> | 100% | 39,842 psi | 89% | 2188 fps | 88.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 19,928 psi | 44% | 1375 fps | 100% |
| Hodgdon Universal² | <<locked>> | 68% | 36,434 psi | 81% | 1824 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 36,056 psi | 80% | 2028 fps | 94.2% |
| Lovex D037.2*² | <<locked>> | 76% | 36,912 psi | 82% | 2028 fps | 89.4% |
| Lovex S011² | <<locked>> | 64% | 40,132 psi | 89% | 1827 fps | 100% |
| Lovex S020² | <<locked>> | 68% | 37,695 psi | 84% | 1867 fps | 100% |
| Maxam CSB 1 | <<locked>> | 80% | 39,334 psi | 87% | 1837 fps | 100% |
| Maxam CSB 2² | <<locked>> | 76% | 39,929 psi | 89% | 1844 fps | 100% |
| Maxam CSB 3² | <<locked>> | 76% | 39,697 psi | 88% | 1818 fps | 100% |
| Maxam CSB 4² | <<locked>> | 72% | 37,971 psi | 84% | 1768 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 37,710 psi | 84% | 1699 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 88% | 38,319 psi | 85% | 2090 fps | 88.5% |
| ReloadSwiss RS 12² | <<locked>> | 64% | 37,463 psi | 83% | 1785 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 18,304 psi | 41% | 1381 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 76% | 38,493 psi | 86% | 1916 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 76% | 37,927 psi | 84% | 2054 fps | 96.7% |
| Rottweil P 806 | <<locked>> | 80% | 39,682 psi | 88% | 2064 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 76% | 36,912 psi | 82% | 2028 fps | 89.4% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 36,056 psi | 80% | 2028 fps | 94.2% |
| SNPE Vectan A0 | <<locked>> | 80% | 39,900 psi | 89% | 1900 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 72% | 39,639 psi | 88% | 1824 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 72% | 38,856 psi | 86% | 1844 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 37,985 psi | 84% | 1670 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 84% | 39,610 psi | 88% | 1969 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 72% | 37,826 psi | 84% | 1837 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 68% | 37,217 psi | 83% | 2044 fps | 99.9% |
| Somchem MP200² | <<locked>> | 68% | 36,680 psi | 82% | 1896 fps | 100% |
| Somchem MS200² | <<locked>> | 76% | 40,234 psi | 89% | 1919 fps | 100% |
| Somchem S221² | <<locked>> | 64% | 38,334 psi | 85% | 2031 fps | 98.7% |
| Vihtavuori 3N37² | <<locked>> | 76% | 38,957 psi | 87% | 1982 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 88% | 37,826 psi | 84% | 2031 fps | 97.3% |
| Vihtavuori N105 | <<locked>> | 92% | 38,348 psi | 85% | 2093 fps | 99.5% |
| Vihtavuori N320² | <<locked>> | 68% | 37,579 psi | 84% | 1762 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 36,085 psi | 80% | 1637 fps | 100% |
| Vihtavuori N330² | <<locked>> | 68% | 37,405 psi | 83% | 1831 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 40,654 psi | 90% | 1923 fps | 100% |
| Vihtavuori N350 | <<locked>> | 80% | 37,550 psi | 84% | 1952 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 76% | 38,029 psi | 85% | 1841 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% | 28,108 psi | 63% | 1719 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 26,542 psi | 59% | 1811 fps | 88.9% |
| Accurate No. 9*² | <<locked>> | 72% | 31,169 psi | 69% | 1909 fps | 86.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 27,760 psi | 62% | 1588 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 24,947 psi | 55% | 1598 fps | 100% |
| Accurate TCM*² | <<locked>> | 72% | 31,560 psi | 70% | 1913 fps | 87.9% |
| ADI AP 100*² | 11.5 gr | 60% | 16,737 psi | 37% | 1473 fps | 90% |
| ADI AP 70N² | <<locked>> | 60% | 35,375 psi | 79% | 1804 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 29,240 psi | 65% | 1486 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 28,036 psi | 62% | 1503 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 27,630 psi | 61% | 1545 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 29,936 psi | 67% | 1644 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 25,556 psi | 57% | 1591 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 76% | 25,556 psi | 57% | 1775 fps | 87% |
| Alliant BULLSEYE² | <<locked>> | 60% | 31,850 psi | 71% | 1821 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 27,615 psi | 61% | 1601 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 18,565 psi | 41% | 1499 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 24,685 psi | 55% | 1762 fps | 95.3% |
| Alliant RED DOT² | <<locked>> | 60% | 26,774 psi | 60% | 1552 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 35,766 psi | 80% | 1893 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 25,048 psi | 56% | 1677 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 27,340 psi | 61% | 1585 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 17,927 psi | 40% | 1388 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 30,095 psi | 67% | 1644 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 23,685 psi | 53% | 1414 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 96% | 34,142 psi | 76% | 2070 fps | 85.3% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 9,021 psi | 20% | 1030 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 29,341 psi | 65% | 1696 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 26,542 psi | 59% | 1811 fps | 88.9% |
| Lovex D037.2*² | <<locked>> | 72% | 31,894 psi | 71% | 1926 fps | 86.7% |
| Lovex S011² | <<locked>> | 60% | 35,418 psi | 79% | 1759 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 29,602 psi | 66% | 1729 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 23,424 psi | 52% | 1558 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 25,614 psi | 57% | 1601 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 26,237 psi | 58% | 1588 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 27,847 psi | 62% | 1598 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 30,908 psi | 69% | 1594 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 84% | 33,127 psi | 74% | 1985 fps | 85.7% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 33,649 psi | 75% | 1726 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 8,514 psi | 19% | 1033 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 24,033 psi | 53% | 1650 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 22,350 psi | 50% | 1690 fps | 88.2% |
| Rottweil P 806² | <<locked>> | 60% | 19,798 psi | 44% | 1634 fps | 97% |
| Shooters World Heavy Pistol*² | <<locked>> | 72% | 31,894 psi | 71% | 1926 fps | 86.7% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 26,542 psi | 59% | 1811 fps | 88.9% |
| SNPE Vectan A0² | <<locked>> | 60% | 23,351 psi | 52% | 1594 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 28,660 psi | 64% | 1647 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 27,862 psi | 62% | 1660 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 31,038 psi | 69% | 1558 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 20,175 psi | 45% | 1558 fps | 97.7% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 27,485 psi | 61% | 1657 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 28,065 psi | 62% | 1854 fps | 98.2% |
| Somchem MP200² | <<locked>> | 60% | 29,095 psi | 65% | 1759 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 26,078 psi | 58% | 1667 fps | 100% |
| Somchem S221² | <<locked>> | 60% | 33,083 psi | 74% | 1929 fps | 97.3% |
| Vihtavuori 3N37² | <<locked>> | 60% | 23,670 psi | 53% | 1677 fps | 99.5% |
| Vihtavuori 3N38*² | 14.1 gr | 64% | 18,304 psi | 41% | 1552 fps | 85.4% |
| Vihtavuori N105*² | 13.9 gr | 64% | 15,229 psi | 34% | 1499 fps | 85.6% |
| Vihtavuori N320² | <<locked>> | 60% | 30,211 psi | 67% | 1647 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 15,360 psi | 34% | 1234 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 29,385 psi | 65% | 1699 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 25,469 psi | 57% | 1660 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 20,784 psi | 46% | 1598 fps | 98.8% |
| Winchester AutoComp ² | <<locked>> | 60% | 24,279 psi | 54% | 1598 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 64 powders for .357 Maximum loaded with the .356 | 100gr | Rim Rock FP. Hodgdon LilGun delivers the highest muzzle velocity at 2,188 fps; across all powders the maximum-charge window runs from 1,375 fps to 2,188 fps. Hodgdon LilGun gives the best case fill at 100 %, and 17 of the 64 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 41–90 %, leaving at least 10 % headroom. Hodgdon LilGun, Hodgdon TrailBoss, ReloadSwiss RS 14 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, Vihtavuori 3N38, ADI AP 100 rank at the top here: for .357 Maximum with the .356 | 100gr | Rim Rock FP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 7, 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.