Load Specifications
Load data in caliber .357 Mag. with .358 | 80gr | Rim Rock DEWC bullet and 63 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, Vihtavuori 3N37 and ReloadSwiss RS 20.
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: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2 | <<locked>> | 80% | 37,173 psi | 85% | 1909 fps | 100% |
| Accurate No. 5² | <<locked>> | 64% | 35,012 psi | 80% | 1959 fps | 95.2% |
| Accurate Solo 1000 | <<locked>> | 84% | 39,001 psi | 90% | 1827 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 88% | 37,565 psi | 86% | 1880 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 33,272 psi | 76% | 1909 fps | 92.6% |
| ADI AP 70N² | <<locked>> | 72% | 35,926 psi | 83% | 1877 fps | 100% |
| ADI APS 350 | <<locked>> | 80% | 38,029 psi | 87% | 1667 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 36,579 psi | 84% | 1690 fps | 100% |
| ADI AS 30 | <<locked>> | 84% | 37,666 psi | 87% | 1768 fps | 100% |
| ADI AS 50N | <<locked>> | 80% | 37,855 psi | 87% | 1834 fps | 100% |
| Alliant BE-86 | <<locked>> | 84% | 35,723 psi | 82% | 1827 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 76% | 36,390 psi | 84% | 1949 fps | 100% |
| Alliant Green Dot | <<locked>> | 84% | 37,260 psi | 86% | 1827 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 34,635 psi | 80% | 1903 fps | 100% |
| Alliant POWER PISTOL* | <<locked>> | 88% | 38,014 psi | 87% | 2070 fps | 93.9% |
| Alliant RED DOT | <<locked>> | 88% | 39,001 psi | 90% | 1818 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 72% | 37,057 psi | 85% | 1962 fps | 100% |
| Alliant UNIQUE | <<locked>> | 88% | 37,492 psi | 86% | 1975 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 84% | 37,971 psi | 87% | 1814 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 34,954 psi | 80% | 1778 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 35,592 psi | 82% | 1785 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 64% | 37,753 psi | 87% | 1900 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 38,667 psi | 89% | 1696 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 72% | 37,797 psi | 87% | 1985 fps | 97.8% |
| Hodgdon Longshot² | <<locked>> | 68% | 36,579 psi | 84% | 1962 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 14,460 psi | 33% | 1283 fps | 100% |
| Hodgdon Universal | <<locked>> | 80% | 36,622 psi | 84% | 1886 fps | 100% |
| Lovex D036² | <<locked>> | 64% | 34,969 psi | 80% | 1955 fps | 95.2% |
| Lovex S011² | <<locked>> | 72% | 37,724 psi | 87% | 1847 fps | 100% |
| Lovex S020 | <<locked>> | 80% | 37,666 psi | 87% | 1919 fps | 100% |
| Maxam CSB 1 | <<locked>> | 92% | 37,898 psi | 87% | 1877 fps | 100% |
| Maxam CSB 2 | <<locked>> | 88% | 37,536 psi | 86% | 1880 fps | 100% |
| Maxam CSB 3 | <<locked>> | 88% | 39,015 psi | 90% | 1870 fps | 100% |
| Maxam CSB 4 | <<locked>> | 84% | 38,696 psi | 89% | 1837 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 35,607 psi | 82% | 1722 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 72% | 37,202 psi | 86% | 1955 fps | 100% |
| Ramshot True Blue² | <<locked>> | 68% | 38,392 psi | 88% | 1985 fps | 99% |
| ReloadSwiss RS 12² | <<locked>> | 76% | 37,507 psi | 86% | 1860 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 12,995 psi | 30% | 1270 fps | 99.9% |
| ReloadSwiss RS 20 | <<locked>> | 88% | 35,650 psi | 82% | 1936 fps | 100% |
| Rottweil P 801² | <<locked>> | 72% | 38,421 psi | 88% | 1827 fps | 100% |
| Rottweil P 806 | <<locked>> | 96% | 38,928 psi | 89% | 2093 fps | 98.6% |
| Shooters World Auto Pistol² | <<locked>> | 64% | 34,969 psi | 80% | 1955 fps | 95.2% |
| SNPE Vectan A0 | <<locked>> | 92% | 38,334 psi | 88% | 1923 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 80% | 36,564 psi | 84% | 1834 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 80% | 35,476 psi | 82% | 1841 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 76% | 38,014 psi | 87% | 1709 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 96% | 37,246 psi | 86% | 1952 fps | 98.4% |
| SNPE Vectan BA9 1/2 | <<locked>> | 84% | 38,116 psi | 88% | 1896 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 84% | 38,870 psi | 89% | 2093 fps | 95.9% |
| Somchem MP200 | <<locked>> | 80% | 36,579 psi | 84% | 1939 fps | 100% |
| Somchem MS200 | <<locked>> | 88% | 39,320 psi | 90% | 1959 fps | 100% |
| Somchem S221*² | <<locked>> | 76% | 38,580 psi | 89% | 2028 fps | 91.7% |
| Vihtavuori 3N37 | <<locked>> | 88% | 36,579 psi | 84% | 1978 fps | 98.8% |
| Vihtavuori 3N38*ᴾ | <<locked>> | 100% | 35,810 psi | 82% | 1978 fps | 87.8% |
| Vihtavuori N310² | <<locked>> | 68% | 39,030 psi | 90% | 1732 fps | 100% |
| Vihtavuori N320 | <<locked>> | 80% | 37,449 psi | 86% | 1827 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 31,952 psi | 73% | 1634 fps | 100% |
| Vihtavuori N330 | <<locked>> | 80% | 34,853 psi | 80% | 1860 fps | 100% |
| Vihtavuori N340 | <<locked>> | 88% | 39,247 psi | 90% | 1959 fps | 100% |
| Vihtavuori N350 | <<locked>> | 92% | 36,999 psi | 85% | 1978 fps | 99.1% |
| Winchester 231² | <<locked>> | 68% | 35,897 psi | 83% | 1841 fps | 100% |
| Winchester AutoComp | <<locked>> | 88% | 36,796 psi | 85% | 1877 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2*² | <<locked>> | 60% | 19,914 psi | 46% | 1529 fps | 94.8% |
| Accurate No. 5*² | <<locked>> | 60% | 30,008 psi | 69% | 1847 fps | 92.9% |
| Accurate Solo 1000² | <<locked>> | 60% | 21,640 psi | 50% | 1506 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 17,695 psi | 41% | 1457 fps | 99.5% |
| ADI AP 100* | <<locked>> | 84% | 22,263 psi | 51% | 1640 fps | 85.3% |
| ADI AP 70N² | <<locked>> | 60% | 25,585 psi | 59% | 1677 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 23,859 psi | 55% | 1421 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 22,960 psi | 53% | 1444 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 21,379 psi | 49% | 1467 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 22,582 psi | 52% | 1545 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 18,463 psi | 42% | 1473 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 60% | 23,032 psi | 53% | 1657 fps | 98.9% |
| Alliant Green Dot² | <<locked>> | 60% | 20,755 psi | 48% | 1503 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 13,053 psi | 30% | 1316 fps | 90.7% |
| Alliant POWER PISTOL*² | <<locked>> | 72% | 24,091 psi | 55% | 1739 fps | 85.6% |
| Alliant RED DOT² | <<locked>> | 60% | 20,552 psi | 47% | 1470 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 25,962 psi | 60% | 1732 fps | 99.3% |
| Alliant UNIQUE² | <<locked>> | 60% | 17,782 psi | 41% | 1503 fps | 95.5% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 20,001 psi | 46% | 1476 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 12,604 psi | 29% | 1270 fps | 99.9% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 21,480 psi | 49% | 1529 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 33,301 psi | 77% | 1827 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 24,149 psi | 56% | 1444 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 25,063 psi | 58% | 1713 fps | 92.2% |
| Hodgdon Longshot² | <<locked>> | 60% | 27,775 psi | 64% | 1781 fps | 95.6% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,570 psi | 15% | 932 fps | 96.9% |
| Hodgdon Universal² | <<locked>> | 60% | 21,451 psi | 49% | 1575 fps | 100% |
| Lovex D036*² | <<locked>> | 60% | 29,965 psi | 69% | 1847 fps | 92.9% |
| Lovex S011² | <<locked>> | 60% | 26,847 psi | 62% | 1657 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 20,508 psi | 47% | 1565 fps | 98.8% |
| Maxam CSB 1² | <<locked>> | 60% | 16,578 psi | 38% | 1414 fps | 99.1% |
| Maxam CSB 2² | <<locked>> | 60% | 17,376 psi | 40% | 1470 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 19,131 psi | 44% | 1476 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 20,914 psi | 48% | 1503 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 23,467 psi | 54% | 1506 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 24,990 psi | 57% | 1703 fps | 97.9% |
| Ramshot True Blue² | <<locked>> | 60% | 28,732 psi | 66% | 1795 fps | 96.1% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 23,598 psi | 54% | 1611 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 6,222 psi | 14% | 919 fps | 91.8% |
| ReloadSwiss RS 20² | 8.2 gr | 60% | 15,867 psi | 36% | 1460 fps | 96.2% |
| Rottweil P 801² | <<locked>> | 60% | 27,325 psi | 63% | 1644 fps | 100% |
| Rottweil P 806*² | 14.7 gr | 72% | 16,998 psi | 39% | 1558 fps | 85.1% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 29,965 psi | 69% | 1847 fps | 92.9% |
| SNPE Vectan A0*² | <<locked>> | 60% | 16,694 psi | 38% | 1424 fps | 94.6% |
| SNPE Vectan A1² | <<locked>> | 60% | 21,335 psi | 49% | 1532 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 20,494 psi | 47% | 1526 fps | 99.5% |
| SNPE Vectan BA10² | <<locked>> | 60% | 25,295 psi | 58% | 1493 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 64% | 16,056 psi | 37% | 1421 fps | 85.4% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 19,885 psi | 46% | 1522 fps | 99.8% |
| SNPE Vectan SP 2*² | <<locked>> | 68% | 22,931 psi | 53% | 1726 fps | 86.9% |
| Somchem MP200² | <<locked>> | 60% | 20,537 psi | 47% | 1575 fps | 96.3% |
| Somchem MS200² | <<locked>> | 60% | 18,869 psi | 43% | 1506 fps | 97.2% |
| Somchem S221*² | <<locked>> | 68% | 29,457 psi | 68% | 1834 fps | 86.8% |
| Vihtavuori 3N37*² | 9.4 gr | 60% | 15,693 psi | 36% | 1440 fps | 86.1% |
| Vihtavuori 3N38* | <<locked>> | 96% | 31,763 psi | 73% | 1896 fps | 85.5% |
| Vihtavuori N310² | <<locked>> | 60% | 30,937 psi | 71% | 1611 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 21,495 psi | 49% | 1532 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,589 psi | 29% | 1207 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 19,421 psi | 45% | 1539 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 17,695 psi | 41% | 1480 fps | 95.9% |
| Vihtavuori N350*² | <<locked>> | 64% | 16,375 psi | 38% | 1467 fps | 87.5% |
| Winchester 231² | <<locked>> | 60% | 27,746 psi | 64% | 1693 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 17,332 psi | 40% | 1450 fps | 98.8% |
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 Mag. loaded with the .358 | 80gr | Rim Rock DEWC. Rottweil P 806 delivers the highest muzzle velocity at 2,093 fps; across all powders the maximum-charge window runs from 1,270 fps to 2,093 fps. ADI AP 100 gives the best case fill at 100 %, and 43 of the 63 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 30–90 %, leaving at least 10 % headroom. ADI AP 100, Alliant Herco, Baschieri & Pellagri 102 Pistol 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. Rottweil P 806, Vihtavuori 3N37, ReloadSwiss RS 20 rank at the top here: for .357 Mag. with the .358 | 80gr | Rim Rock DEWC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AP 100, Alliant POWER PISTOL, Somchem S221 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.