Load Specifications
Load data in caliber .357 Maximum with .358 | 130gr | Rim Rock RNFP Cowboy 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 No. 2² | <<locked>> | 68% | 39,856 psi | 89% | 1650 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 35,418 psi | 79% | 1775 fps | 97.1% |
| Accurate No. 9*² | <<locked>> | 72% | 36,114 psi | 80% | 1785 fps | 93.1% |
| Accurate Solo 1000² | <<locked>> | 72% | 40,306 psi | 90% | 1539 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 38,247 psi | 85% | 1575 fps | 100% |
| Accurate TCM*² | <<locked>> | 72% | 35,839 psi | 80% | 1772 fps | 94.1% |
| ADI AP 100 | <<locked>> | 84% | 36,985 psi | 82% | 1729 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 39,871 psi | 89% | 1427 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 38,899 psi | 87% | 1447 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 39,276 psi | 87% | 1493 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 40,103 psi | 89% | 1552 fps | 100% |
| Alliant 2400* | <<locked>> | 84% | 39,088 psi | 87% | 1857 fps | 91.8% |
| Alliant BE-86² | <<locked>> | 72% | 39,363 psi | 88% | 1568 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 88% | 40,422 psi | 90% | 1850 fps | 97.7% |
| Alliant BULLSEYE² | <<locked>> | 64% | 39,001 psi | 87% | 1670 fps | 100% |
| Alliant Green Dot² | <<locked>> | 72% | 40,190 psi | 89% | 1555 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 37,855 psi | 84% | 1647 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 72% | 40,205 psi | 89% | 1831 fps | 100% |
| Alliant RED DOT² | <<locked>> | 72% | 38,421 psi | 85% | 1503 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 38,754 psi | 86% | 1667 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 36,709 psi | 82% | 1493 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 88% | 39,740 psi | 88% | 1535 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 37,347 psi | 83% | 1512 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 37,840 psi | 84% | 1578 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 38,609 psi | 86% | 1440 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 92% | 35,911 psi | 80% | 1883 fps | 91.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 21,698 psi | 48% | 1211 fps | 100% |
| Hodgdon Universal² | <<locked>> | 68% | 39,943 psi | 89% | 1611 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 35,418 psi | 79% | 1775 fps | 97.1% |
| Lovex D037.2*² | <<locked>> | 72% | 37,057 psi | 82% | 1798 fps | 93.5% |
| Lovex S020² | <<locked>> | 64% | 37,028 psi | 82% | 1591 fps | 100% |
| Maxam CSB 1² | <<locked>> | 76% | 39,102 psi | 87% | 1578 fps | 100% |
| Maxam CSB 2² | <<locked>> | 72% | 39,798 psi | 89% | 1578 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 38,682 psi | 86% | 1549 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 37,565 psi | 84% | 1512 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 40,277 psi | 90% | 1493 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 84% | 39,001 psi | 87% | 1864 fps | 92.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 20,508 psi | 46% | 1227 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 38,159 psi | 85% | 1640 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 38,218 psi | 85% | 1808 fps | 99% |
| Rottweil P 806² | <<locked>> | 76% | 40,654 psi | 90% | 1808 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 72% | 37,057 psi | 82% | 1798 fps | 93.5% |
| Shooters World Major Pistol² | <<locked>> | 64% | 35,418 psi | 79% | 1775 fps | 97.1% |
| SNPE Vectan A0² | <<locked>> | 76% | 39,247 psi | 87% | 1627 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 38,421 psi | 85% | 1558 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 37,797 psi | 84% | 1572 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 40,118 psi | 89% | 1463 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 27,427 psi | 61% | 1631 fps | 89.2% |
| SNPE Vectan BA7 1/2 | <<locked>> | 80% | 40,089 psi | 89% | 1716 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 37,507 psi | 83% | 1572 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 37,231 psi | 83% | 1775 fps | 100% |
| Somchem MP200² | <<locked>> | 68% | 40,611 psi | 90% | 1686 fps | 100% |
| Somchem MS200² | <<locked>> | 72% | 39,842 psi | 89% | 1647 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 72% | 38,812 psi | 86% | 1713 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 84% | 38,421 psi | 85% | 1791 fps | 99.4% |
| Vihtavuori N105 | <<locked>> | 88% | 40,059 psi | 89% | 1850 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 34,461 psi | 77% | 1801 fps | 90.4% |
| Vihtavuori N320² | <<locked>> | 68% | 40,669 psi | 90% | 1549 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 38,595 psi | 86% | 1437 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 37,173 psi | 83% | 1568 fps | 100% |
| Vihtavuori N340² | <<locked>> | 72% | 40,509 psi | 90% | 1654 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 38,189 psi | 85% | 1696 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 37,782 psi | 84% | 1581 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% | 30,893 psi | 69% | 1522 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 30,501 psi | 68% | 1683 fps | 95.3% |
| Accurate No. 9*² | <<locked>> | 64% | 27,093 psi | 60% | 1604 fps | 88.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 30,226 psi | 67% | 1398 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 27,485 psi | 61% | 1414 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 23,395 psi | 52% | 1509 fps | 86.7% |
| ADI AP 100² | 10.8 gr | 60% | 18,811 psi | 42% | 1352 fps | 95.8% |
| ADI APS 350² | <<locked>> | 60% | 30,632 psi | 68% | 1296 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 29,747 psi | 66% | 1316 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 29,733 psi | 66% | 1355 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 32,300 psi | 72% | 1444 fps | 100% |
| Alliant 2400*² | <<locked>> | 76% | 30,705 psi | 68% | 1703 fps | 87.5% |
| Alliant BE-86² | <<locked>> | 60% | 28,065 psi | 62% | 1407 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 64% | 20,247 psi | 45% | 1424 fps | 87.1% |
| Alliant BULLSEYE² | <<locked>> | 60% | 34,766 psi | 77% | 1608 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 30,240 psi | 67% | 1414 fps | 100% |
| Alliant Herco² | 9.8 gr | 60% | 20,450 psi | 45% | 1339 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 28,224 psi | 63% | 1614 fps | 99.2% |
| Alliant RED DOT² | <<locked>> | 60% | 28,834 psi | 64% | 1362 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 28,065 psi | 62% | 1499 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 29,805 psi | 66% | 1394 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 19,827 psi | 44% | 1227 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 32,721 psi | 73% | 1453 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 30,501 psi | 68% | 1470 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,048 psi | 56% | 1234 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 84% | 26,701 psi | 59% | 1693 fps | 85.2% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 10,080 psi | 22% | 915 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 32,416 psi | 72% | 1506 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 30,501 psi | 68% | 1683 fps | 95.3% |
| Lovex D037.2*² | <<locked>> | 60% | 23,685 psi | 53% | 1522 fps | 85.5% |
| Lovex S020² | <<locked>> | 60% | 32,851 psi | 73% | 1535 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 25,802 psi | 57% | 1378 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 29,008 psi | 65% | 1424 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 28,529 psi | 63% | 1398 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 30,560 psi | 68% | 1411 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 32,808 psi | 73% | 1391 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 72% | 25,686 psi | 57% | 1601 fps | 85.3% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 9,558 psi | 21% | 922 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 26,948 psi | 60% | 1470 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 25,802 psi | 57% | 1565 fps | 94.7% |
| Rottweil P 806² | <<locked>> | 60% | 23,293 psi | 52% | 1512 fps | 99.9% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 23,685 psi | 53% | 1522 fps | 85.5% |
| Shooters World Major Pistol² | <<locked>> | 60% | 30,501 psi | 68% | 1683 fps | 95.3% |
| SNPE Vectan A0² | <<locked>> | 60% | 26,005 psi | 58% | 1421 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 31,111 psi | 69% | 1453 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 30,458 psi | 68% | 1467 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 33,069 psi | 74% | 1368 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 96% | 24,468 psi | 54% | 1565 fps | 86.9% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 22,640 psi | 50% | 1414 fps | 99.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 29,878 psi | 66% | 1460 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 32,053 psi | 71% | 1690 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 31,850 psi | 71% | 1558 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 28,993 psi | 64% | 1483 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 27,021 psi | 60% | 1522 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 18,681 psi | 42% | 1371 fps | 90.5% |
| Vihtavuori N105*² | 12.3 gr | 60% | 15,795 psi | 35% | 1335 fps | 91.6% |
| Vihtavuori N110* | <<locked>> | 92% | 26,861 psi | 60% | 1647 fps | 85.6% |
| Vihtavuori N320² | <<locked>> | 60% | 33,025 psi | 73% | 1447 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 17,100 psi | 38% | 1089 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 33,040 psi | 73% | 1509 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 28,703 psi | 64% | 1483 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 23,612 psi | 53% | 1450 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 27,238 psi | 61% | 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 10 powders for .357 Maximum loaded with the .358 | 130gr | Rim Rock RNFP Cowboy. Ramshot Enforcer delivers the highest muzzle velocity at 1,864 fps; across all powders the maximum-charge window runs from 1,211 fps to 1,864 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 10 of the 10 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 46–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N32C Tin Star 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 .358 | 130gr | Rim Rock RNFP Cowboy they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Ramshot Enforcer 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.