Load Specifications
Load data in caliber .357 Maximum with .358 | 158gr | Rim Rock SWC bullet and 65 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Baschieri & Pellagri 102 Pistol, Vihtavuori N32C Tin Star and ReloadSwiss RS 14.
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>> | 84% | 37,115 psi | 83% | 1627 fps | 90.5% |
| Accurate No. 2² | <<locked>> | 64% | 36,042 psi | 80% | 1407 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 37,173 psi | 83% | 1614 fps | 98.9% |
| Accurate No. 9² | <<locked>> | 72% | 37,478 psi | 83% | 1621 fps | 95.7% |
| Accurate Solo 1000² | <<locked>> | 68% | 37,536 psi | 83% | 1319 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 39,276 psi | 87% | 1394 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 37,376 psi | 83% | 1614 fps | 96.6% |
| ADI AP 100 | <<locked>> | 84% | 37,869 psi | 84% | 1545 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 40,611 psi | 90% | 1260 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 39,610 psi | 88% | 1280 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 40,118 psi | 89% | 1319 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 36,695 psi | 82% | 1322 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 36,260 psi | 81% | 1624 fps | 92.9% |
| Alliant BE-86² | <<locked>> | 72% | 40,335 psi | 90% | 1391 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 38,130 psi | 85% | 1621 fps | 98.5% |
| Alliant BULLSEYE² | <<locked>> | 64% | 39,856 psi | 89% | 1480 fps | 100% |
| Alliant Green Dot² | <<locked>> | 68% | 37,594 psi | 84% | 1335 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 38,798 psi | 86% | 1467 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 37,275 psi | 83% | 1585 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 88% | 37,956 psi | 84% | 1680 fps | 88.3% |
| Alliant RED DOT² | <<locked>> | 72% | 39,044 psi | 87% | 1325 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 40,509 psi | 90% | 1490 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 37,695 psi | 84% | 1322 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 37,217 psi | 83% | 1325 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 38,116 psi | 85% | 1345 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 39,479 psi | 88% | 1276 fps | 100% |
| Hodgdon H110* | <<locked>> | 88% | 39,349 psi | 88% | 1703 fps | 88% |
| Hodgdon LilGun* | <<locked>> | 92% | 38,159 psi | 85% | 1736 fps | 94.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 22,350 psi | 50% | 1073 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 36,941 psi | 82% | 1381 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 37,173 psi | 83% | 1614 fps | 98.9% |
| Lovex D037.2² | <<locked>> | 72% | 38,580 psi | 86% | 1637 fps | 96.1% |
| Lovex S020² | <<locked>> | 64% | 38,363 psi | 85% | 1417 fps | 100% |
| Maxam CSB 1² | <<locked>> | 76% | 39,813 psi | 89% | 1394 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 36,956 psi | 82% | 1355 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 39,871 psi | 89% | 1375 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 38,130 psi | 85% | 1332 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 37,463 psi | 83% | 1276 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 80% | 35,578 psi | 79% | 1624 fps | 93.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 21,292 psi | 47% | 1089 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 39,740 psi | 88% | 1463 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 39,871 psi | 89% | 1634 fps | 99.9% |
| Rottweil P 806² | <<locked>> | 72% | 37,144 psi | 83% | 1565 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 38,580 psi | 86% | 1637 fps | 96.1% |
| Shooters World Major Pistol² | <<locked>> | 64% | 37,173 psi | 83% | 1614 fps | 98.9% |
| SNPE Vectan A0² | <<locked>> | 72% | 36,854 psi | 82% | 1404 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 39,392 psi | 88% | 1381 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 38,827 psi | 86% | 1394 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 40,321 psi | 90% | 1289 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 28,471 psi | 63% | 1490 fps | 92.6% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 36,912 psi | 82% | 1476 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 38,580 psi | 86% | 1394 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 38,624 psi | 86% | 1591 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 37,231 psi | 83% | 1444 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 37,014 psi | 82% | 1417 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 72% | 40,683 psi | 90% | 1535 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 84% | 40,451 psi | 90% | 1624 fps | 100% |
| Vihtavuori N105 | <<locked>> | 84% | 37,057 psi | 82% | 1608 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 36,535 psi | 81% | 1650 fps | 93.7% |
| Vihtavuori N320² | <<locked>> | 64% | 37,971 psi | 84% | 1329 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 39,784 psi | 88% | 1273 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 38,290 psi | 85% | 1391 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 37,202 psi | 83% | 1417 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 39,102 psi | 87% | 1509 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 38,885 psi | 86% | 1407 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*² | <<locked>> | 76% | 28,311 psi | 63% | 1476 fps | 85.6% |
| Accurate No. 2² | <<locked>> | 60% | 31,836 psi | 71% | 1355 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 31,966 psi | 71% | 1529 fps | 97.6% |
| Accurate No. 9*² | <<locked>> | 60% | 24,424 psi | 54% | 1385 fps | 89% |
| Accurate Solo 1000² | <<locked>> | 60% | 30,893 psi | 69% | 1234 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 28,195 psi | 63% | 1250 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 24,598 psi | 55% | 1385 fps | 90.5% |
| ADI AP 100² | <<locked>> | 60% | 19,711 psi | 44% | 1224 fps | 98% |
| ADI APS 350² | <<locked>> | 60% | 31,488 psi | 70% | 1148 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 30,501 psi | 68% | 1165 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 30,560 psi | 68% | 1201 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 33,373 psi | 74% | 1280 fps | 100% |
| Alliant 2400*² | <<locked>> | 68% | 24,729 psi | 55% | 1407 fps | 86.2% |
| Alliant BE-86² | <<locked>> | 60% | 29,109 psi | 65% | 1253 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 18,608 psi | 41% | 1230 fps | 88.4% |
| Alliant BULLSEYE² | <<locked>> | 60% | 35,694 psi | 79% | 1427 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 31,038 psi | 69% | 1250 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 21,219 psi | 47% | 1198 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 28,935 psi | 64% | 1450 fps | 99.9% |
| Alliant Power Pro 300-MP* | <<locked>> | 84% | 32,996 psi | 73% | 1601 fps | 85.7% |
| Alliant RED DOT² | <<locked>> | 60% | 29,486 psi | 66% | 1201 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 29,312 psi | 65% | 1339 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 30,472 psi | 68% | 1234 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | 8.2 gr | 60% | 20,668 psi | 46% | 1096 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 33,852 psi | 75% | 1293 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,860 psi | 58% | 1096 fps | 100% |
| Hodgdon H110* | <<locked>> | 84% | 34,243 psi | 76% | 1621 fps | 85.4% |
| Hodgdon LilGun* | <<locked>> | 80% | 24,642 psi | 55% | 1486 fps | 86.9% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 10,428 psi | 23% | 814 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 33,083 psi | 74% | 1329 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 31,966 psi | 71% | 1529 fps | 97.6% |
| Lovex D037.2*² | <<locked>> | 60% | 24,816 psi | 55% | 1394 fps | 89.4% |
| Lovex S020² | <<locked>> | 60% | 34,243 psi | 76% | 1368 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 26,397 psi | 59% | 1217 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 29,950 psi | 67% | 1263 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 29,501 psi | 66% | 1240 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 31,473 psi | 70% | 1247 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 33,982 psi | 76% | 1234 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 68% | 23,496 psi | 52% | 1394 fps | 86.7% |
| ReloadSwiss RS 14² | 4.8 gr | 60% | 9,950 psi | 22% | 823 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 27,949 psi | 62% | 1309 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 26,919 psi | 60% | 1421 fps | 97.2% |
| Rottweil P 806² | <<locked>> | 60% | 24,424 psi | 54% | 1371 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 24,816 psi | 55% | 1394 fps | 89.4% |
| Shooters World Major Pistol² | <<locked>> | 60% | 31,966 psi | 71% | 1529 fps | 97.6% |
| SNPE Vectan A0² | <<locked>> | 60% | 26,585 psi | 59% | 1260 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 31,633 psi | 70% | 1286 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 31,009 psi | 69% | 1296 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 33,649 psi | 75% | 1207 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 88% | 20,523 psi | 46% | 1316 fps | 86.4% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 23,511 psi | 52% | 1270 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 31,096 psi | 69% | 1299 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 33,823 psi | 75% | 1522 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 32,967 psi | 73% | 1388 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 29,776 psi | 66% | 1319 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 28,065 psi | 62% | 1365 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 19,261 psi | 43% | 1243 fps | 93.6% |
| Vihtavuori N105² | <<locked>> | 60% | 16,766 psi | 37% | 1224 fps | 95.3% |
| Vihtavuori N110* | <<locked>> | 88% | 25,193 psi | 56% | 1447 fps | 87.4% |
| Vihtavuori N320² | <<locked>> | 60% | 33,721 psi | 75% | 1280 fps | 100% |
| Vihtavuori N32C Tin Star² | 6.3 gr | 60% | 17,303 psi | 38% | 958 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 34,142 psi | 76% | 1339 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 29,733 psi | 66% | 1319 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 24,511 psi | 55% | 1299 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 27,920 psi | 62% | 1263 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 65 powders for .357 Maximum loaded with the .358 | 158gr | Rim Rock SWC. Hodgdon LilGun delivers the highest muzzle velocity at 1,736 fps; across all powders the maximum-charge window runs from 1,073 fps to 1,736 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 18 of the 65 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 47–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, SNPE Vectan BA6 1/2 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. Baschieri & Pellagri 102 Pistol, Vihtavuori N32C Tin Star, ReloadSwiss RS 14 rank at the top here: for .357 Maximum with the .358 | 158gr | Rim Rock SWC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4100, Alliant 2400, Alliant Power Pro 300-MP burn incompletely and react more sensitively to barrel length and temperature. Baschieri & Pellagri 102 Pistol, Hodgdon Clays, Hodgdon TrailBoss 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.