Load Specifications
Load data in caliber .357 Maximum with .358 | 158gr | Rim Rock SWC?HP Gas Check 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% | 37,014 psi | 82% | 1624 fps | 90.4% |
| Accurate No. 2² | <<locked>> | 64% | 36,376 psi | 81% | 1411 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 36,970 psi | 82% | 1608 fps | 98.8% |
| Accurate No. 9² | <<locked>> | 72% | 37,333 psi | 83% | 1617 fps | 95.6% |
| Accurate Solo 1000² | <<locked>> | 68% | 37,826 psi | 84% | 1322 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 38,856 psi | 86% | 1388 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 37,202 psi | 83% | 1608 fps | 96.5% |
| ADI AP 100 | <<locked>> | 84% | 38,218 psi | 85% | 1549 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 40,190 psi | 89% | 1253 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 39,929 psi | 89% | 1283 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 40,422 psi | 90% | 1322 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 40,495 psi | 90% | 1365 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 36,100 psi | 80% | 1624 fps | 92.9% |
| Alliant BE-86² | <<locked>> | 72% | 40,625 psi | 90% | 1394 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 37,927 psi | 84% | 1617 fps | 98.5% |
| Alliant BULLSEYE² | <<locked>> | 64% | 40,161 psi | 89% | 1483 fps | 100% |
| Alliant Green Dot² | <<locked>> | 68% | 37,173 psi | 83% | 1329 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 38,522 psi | 86% | 1460 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 36,999 psi | 82% | 1578 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 88% | 37,840 psi | 84% | 1677 fps | 88.1% |
| Alliant RED DOT² | <<locked>> | 72% | 39,349 psi | 88% | 1329 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 40,132 psi | 89% | 1486 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 38,014 psi | 85% | 1322 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 37,550 psi | 84% | 1329 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 37,855 psi | 84% | 1339 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 39,102 psi | 87% | 1270 fps | 100% |
| Hodgdon H110* | <<locked>> | 88% | 39,291 psi | 87% | 1699 fps | 87.9% |
| Hodgdon LilGun* | <<locked>> | 92% | 37,507 psi | 83% | 1722 fps | 94.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 22,495 psi | 50% | 1073 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 37,217 psi | 83% | 1381 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 36,970 psi | 82% | 1608 fps | 98.8% |
| Lovex D037.2² | <<locked>> | 72% | 38,435 psi | 85% | 1634 fps | 96% |
| Lovex S020² | <<locked>> | 64% | 38,682 psi | 86% | 1417 fps | 100% |
| Maxam CSB 1² | <<locked>> | 76% | 40,132 psi | 89% | 1398 fps | 100% |
| Maxam CSB 2² | <<locked>> | 72% | 40,669 psi | 90% | 1394 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 40,176 psi | 89% | 1375 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 38,421 psi | 85% | 1335 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 40,654 psi | 90% | 1312 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 80% | 35,462 psi | 79% | 1617 fps | 93.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 20,987 psi | 47% | 1086 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 39,349 psi | 88% | 1457 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 39,624 psi | 88% | 1631 fps | 99.9% |
| Rottweil P 806² | <<locked>> | 72% | 36,941 psi | 82% | 1562 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 38,435 psi | 85% | 1634 fps | 96% |
| Shooters World Major Pistol² | <<locked>> | 64% | 36,970 psi | 82% | 1608 fps | 98.8% |
| SNPE Vectan A0² | <<locked>> | 76% | 40,379 psi | 90% | 1444 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 39,697 psi | 88% | 1385 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 39,146 psi | 87% | 1398 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 40,625 psi | 90% | 1289 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 28,326 psi | 63% | 1490 fps | 92.5% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 36,651 psi | 82% | 1473 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 38,232 psi | 85% | 1388 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 38,290 psi | 85% | 1585 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 37,492 psi | 83% | 1447 fps | 100% |
| Somchem MS200² | <<locked>> | 72% | 40,640 psi | 90% | 1457 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 72% | 40,422 psi | 90% | 1532 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 84% | 40,248 psi | 90% | 1621 fps | 100% |
| Vihtavuori N105 | <<locked>> | 84% | 36,796 psi | 82% | 1601 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 35,795 psi | 80% | 1640 fps | 93.4% |
| Vihtavuori N320² | <<locked>> | 64% | 37,579 psi | 84% | 1322 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 39,479 psi | 88% | 1270 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 37,840 psi | 84% | 1381 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 37,536 psi | 83% | 1421 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 39,450 psi | 88% | 1512 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 38,609 psi | 86% | 1401 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% | 28,166 psi | 63% | 1473 fps | 85.4% |
| Accurate No. 2² | <<locked>> | 60% | 32,082 psi | 71% | 1355 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 31,778 psi | 71% | 1526 fps | 97.5% |
| Accurate No. 9*² | <<locked>> | 60% | 24,250 psi | 54% | 1381 fps | 88.9% |
| Accurate Solo 1000² | <<locked>> | 60% | 31,125 psi | 69% | 1237 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 28,413 psi | 63% | 1253 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 24,424 psi | 54% | 1378 fps | 90.3% |
| ADI AP 100² | <<locked>> | 60% | 19,464 psi | 43% | 1217 fps | 97.9% |
| ADI APS 350² | <<locked>> | 60% | 31,053 psi | 69% | 1142 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 30,095 psi | 67% | 1158 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 30,139 psi | 67% | 1191 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 33,591 psi | 75% | 1280 fps | 100% |
| Alliant 2400*² | <<locked>> | 68% | 24,598 psi | 55% | 1404 fps | 86.1% |
| Alliant BE-86² | <<locked>> | 60% | 29,327 psi | 65% | 1253 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 18,739 psi | 42% | 1234 fps | 88.5% |
| Alliant BULLSEYE² | <<locked>> | 60% | 35,969 psi | 80% | 1430 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 30,647 psi | 68% | 1243 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 21,364 psi | 48% | 1198 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 29,138 psi | 65% | 1453 fps | 99.9% |
| Alliant Power Pro 300-MP* | <<locked>> | 84% | 32,866 psi | 73% | 1598 fps | 85.6% |
| Alliant RED DOT² | <<locked>> | 60% | 29,675 psi | 66% | 1204 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 28,921 psi | 64% | 1332 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 30,690 psi | 68% | 1234 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | 8.1 gr | 60% | 20,392 psi | 45% | 1089 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 33,620 psi | 75% | 1289 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,483 psi | 57% | 1089 fps | 100% |
| Hodgdon H110* | <<locked>> | 84% | 34,113 psi | 76% | 1617 fps | 85.3% |
| Hodgdon LilGun* | <<locked>> | 80% | 24,497 psi | 54% | 1480 fps | 86.7% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 10,486 psi | 23% | 814 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 33,315 psi | 74% | 1332 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 31,778 psi | 71% | 1526 fps | 97.5% |
| Lovex D037.2*² | <<locked>> | 60% | 24,627 psi | 55% | 1388 fps | 89.1% |
| Lovex S020² | <<locked>> | 60% | 33,837 psi | 75% | 1362 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 26,571 psi | 59% | 1220 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 29,559 psi | 66% | 1257 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 29,704 psi | 66% | 1243 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 31,038 psi | 69% | 1243 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 33,533 psi | 75% | 1227 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 68% | 23,337 psi | 52% | 1391 fps | 86.5% |
| ReloadSwiss RS 14² | 4.7 gr | 60% | 9,703 psi | 22% | 814 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 28,166 psi | 63% | 1312 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 26,701 psi | 59% | 1414 fps | 97.1% |
| Rottweil P 806² | <<locked>> | 60% | 24,207 psi | 54% | 1365 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 24,627 psi | 55% | 1388 fps | 89.1% |
| Shooters World Major Pistol² | <<locked>> | 60% | 31,778 psi | 71% | 1526 fps | 97.5% |
| SNPE Vectan A0² | <<locked>> | 60% | 26,803 psi | 60% | 1263 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 31,865 psi | 71% | 1286 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 31,256 psi | 70% | 1299 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 33,228 psi | 74% | 1201 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 88% | 20,407 psi | 45% | 1312 fps | 86.2% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 23,250 psi | 52% | 1263 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 30,719 psi | 68% | 1293 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 33,518 psi | 75% | 1519 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 33,228 psi | 74% | 1391 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 29,414 psi | 65% | 1312 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 27,789 psi | 62% | 1358 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 19,392 psi | 43% | 1243 fps | 93.7% |
| Vihtavuori N105² | <<locked>> | 60% | 16,549 psi | 37% | 1217 fps | 95.1% |
| Vihtavuori N110* | <<locked>> | 88% | 25,019 psi | 56% | 1444 fps | 87.2% |
| Vihtavuori N320² | <<locked>> | 60% | 33,997 psi | 76% | 1283 fps | 100% |
| Vihtavuori N32C Tin Star² | 6.3 gr | 60% | 17,405 psi | 39% | 961 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 33,736 psi | 75% | 1335 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 29,370 psi | 65% | 1316 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 24,207 psi | 54% | 1293 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 27,615 psi | 61% | 1260 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?HP Gas Check. Hodgdon LilGun delivers the highest muzzle velocity at 1,722 fps; across all powders the maximum-charge window runs from 1,073 fps to 1,722 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?HP Gas Check 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.