Load Specifications
Load data in caliber .357 Maximum with .358 | 158gr | Rim Rock SWC Gas Check bullet and 63 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AP 100, Baschieri & Pellagri 102 Pistol and Vihtavuori N32C Tin Star.
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% | 35,868 psi | 80% | 1598 fps | 89.5% |
| Accurate No. 2² | <<locked>> | 68% | 40,437 psi | 90% | 1450 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 35,897 psi | 80% | 1585 fps | 98.5% |
| Accurate No. 9² | <<locked>> | 72% | 36,463 psi | 81% | 1594 fps | 95.1% |
| Accurate Solo 1000² | <<locked>> | 68% | 37,072 psi | 82% | 1306 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 38,261 psi | 85% | 1375 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 36,303 psi | 81% | 1588 fps | 96% |
| ADI AP 100 | <<locked>> | 84% | 37,434 psi | 83% | 1532 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 40,161 psi | 89% | 1247 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 39,305 psi | 87% | 1266 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 39,668 psi | 88% | 1306 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 40,553 psi | 90% | 1358 fps | 100% |
| Alliant 2400* | <<locked>> | 84% | 39,566 psi | 88% | 1667 fps | 93.9% |
| Alliant BE-86² | <<locked>> | 72% | 39,624 psi | 88% | 1375 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 36,840 psi | 82% | 1594 fps | 98.1% |
| Alliant BULLSEYE² | <<locked>> | 64% | 39,523 psi | 88% | 1470 fps | 100% |
| Alliant Green Dot² | <<locked>> | 68% | 37,144 psi | 83% | 1322 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 38,247 psi | 85% | 1453 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 36,608 psi | 81% | 1565 fps | 100% |
| Alliant RED DOT² | <<locked>> | 72% | 38,508 psi | 86% | 1312 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 39,552 psi | 88% | 1473 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 37,333 psi | 83% | 1309 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 88% | 40,480 psi | 90% | 1352 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 37,173 psi | 83% | 1325 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 39,189 psi | 87% | 1263 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 92% | 36,274 psi | 81% | 1699 fps | 93.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 21,857 psi | 49% | 1056 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 36,550 psi | 81% | 1368 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 35,897 psi | 80% | 1585 fps | 98.5% |
| Lovex D037.2² | <<locked>> | 72% | 37,579 psi | 84% | 1614 fps | 95.5% |
| Lovex S020² | <<locked>> | 64% | 38,072 psi | 85% | 1404 fps | 100% |
| Maxam CSB 1² | <<locked>> | 76% | 39,610 psi | 88% | 1385 fps | 100% |
| Maxam CSB 2² | <<locked>> | 72% | 40,030 psi | 89% | 1381 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 39,566 psi | 88% | 1362 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 37,695 psi | 84% | 1319 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 40,625 psi | 90% | 1306 fps | 100% |
| Ramshot Enforcer | <<locked>> | 84% | 39,581 psi | 88% | 1677 fps | 95% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 20,827 psi | 46% | 1076 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 38,841 psi | 86% | 1444 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 38,377 psi | 85% | 1604 fps | 99.7% |
| Rottweil P 806² | <<locked>> | 72% | 35,853 psi | 80% | 1542 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 37,579 psi | 84% | 1614 fps | 95.5% |
| Shooters World Major Pistol² | <<locked>> | 64% | 35,897 psi | 80% | 1585 fps | 98.5% |
| SNPE Vectan A0² | <<locked>> | 76% | 39,943 psi | 89% | 1430 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 38,653 psi | 86% | 1365 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 38,072 psi | 85% | 1378 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 40,001 psi | 89% | 1276 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 27,717 psi | 62% | 1470 fps | 91.9% |
| SNPE Vectan BA7 1/2 | <<locked>> | 80% | 40,074 psi | 89% | 1506 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 37,666 psi | 84% | 1375 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 37,318 psi | 83% | 1568 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 36,376 psi | 81% | 1427 fps | 100% |
| Somchem MS200² | <<locked>> | 72% | 40,147 psi | 89% | 1444 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 72% | 39,494 psi | 88% | 1516 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 84% | 39,001 psi | 87% | 1598 fps | 99.9% |
| Vihtavuori N105 | <<locked>> | 88% | 40,683 psi | 90% | 1647 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 35,070 psi | 78% | 1621 fps | 92.9% |
| Vihtavuori N320² | <<locked>> | 64% | 37,492 psi | 83% | 1316 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 39,088 psi | 87% | 1260 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 37,202 psi | 83% | 1368 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 36,303 psi | 81% | 1401 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 38,464 psi | 86% | 1493 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 37,681 psi | 84% | 1385 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* | <<locked>> | 80% | 31,401 psi | 70% | 1526 fps | 87.2% |
| Accurate No. 2² | <<locked>> | 60% | 31,343 psi | 70% | 1339 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 31,140 psi | 69% | 1506 fps | 97.1% |
| Accurate No. 9*² | <<locked>> | 60% | 23,380 psi | 52% | 1355 fps | 87.9% |
| Accurate Solo 1000² | <<locked>> | 60% | 30,298 psi | 67% | 1217 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 27,615 psi | 61% | 1237 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 23,902 psi | 53% | 1358 fps | 89.7% |
| ADI AP 100² | 9.3 gr | 60% | 19,363 psi | 43% | 1207 fps | 97.7% |
| ADI APS 350² | <<locked>> | 60% | 30,763 psi | 68% | 1129 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 29,921 psi | 67% | 1148 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 29,849 psi | 66% | 1181 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 32,764 psi | 73% | 1263 fps | 100% |
| Alliant 2400*² | <<locked>> | 68% | 23,685 psi | 53% | 1378 fps | 85.1% |
| Alliant BE-86² | <<locked>> | 60% | 28,776 psi | 64% | 1240 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 18,101 psi | 40% | 1211 fps | 87.6% |
| Alliant BULLSEYE² | <<locked>> | 60% | 35,201 psi | 78% | 1414 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 30,429 psi | 68% | 1234 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 20,813 psi | 46% | 1184 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 28,166 psi | 63% | 1430 fps | 99.8% |
| Alliant RED DOT² | <<locked>> | 60% | 29,341 psi | 65% | 1191 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 28,239 psi | 63% | 1316 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 29,921 psi | 67% | 1217 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | 7.9 gr | 60% | 20,247 psi | 45% | 1083 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 33,417 psi | 74% | 1283 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,208 psi | 56% | 1079 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 80% | 23,511 psi | 52% | 1453 fps | 85.5% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 10,138 psi | 23% | 801 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 32,576 psi | 72% | 1316 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 31,140 psi | 69% | 1506 fps | 97.1% |
| Lovex D037.2*² | <<locked>> | 60% | 24,120 psi | 54% | 1371 fps | 88.5% |
| Lovex S020² | <<locked>> | 60% | 33,141 psi | 74% | 1345 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 25,846 psi | 57% | 1204 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 29,370 psi | 65% | 1250 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 28,892 psi | 64% | 1224 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 30,864 psi | 69% | 1234 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 33,330 psi | 74% | 1217 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 68% | 22,539 psi | 50% | 1368 fps | 85.5% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 9,660 psi | 21% | 810 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 27,499 psi | 61% | 1296 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 25,962 psi | 58% | 1394 fps | 96.6% |
| Rottweil P 806² | <<locked>> | 60% | 23,569 psi | 52% | 1348 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 24,120 psi | 54% | 1371 fps | 88.5% |
| Shooters World Major Pistol² | <<locked>> | 60% | 31,140 psi | 69% | 1506 fps | 97.1% |
| SNPE Vectan A0² | <<locked>> | 60% | 26,165 psi | 58% | 1247 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 31,328 psi | 70% | 1273 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 30,705 psi | 68% | 1286 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 33,127 psi | 74% | 1191 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 88% | 19,798 psi | 44% | 1289 fps | 85.2% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 22,829 psi | 51% | 1250 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 30,661 psi | 68% | 1286 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 33,040 psi | 73% | 1506 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 32,677 psi | 73% | 1378 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 29,341 psi | 65% | 1302 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 27,340 psi | 61% | 1345 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 18,652 psi | 41% | 1220 fps | 92.8% |
| Vihtavuori N105*² | <<locked>> | 60% | 16,099 psi | 36% | 1201 fps | 94.5% |
| Vihtavuori N110* | <<locked>> | 88% | 24,236 psi | 54% | 1421 fps | 86.3% |
| Vihtavuori N320² | <<locked>> | 60% | 33,156 psi | 74% | 1263 fps | 100% |
| Vihtavuori N32C Tin Star² | 6.1 gr | 60% | 17,100 psi | 38% | 948 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 33,025 psi | 73% | 1319 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 28,718 psi | 64% | 1299 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 23,699 psi | 53% | 1276 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 27,586 psi | 61% | 1253 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 63 powders for .357 Maximum loaded with the .358 | 158gr | Rim Rock SWC Gas Check. Hodgdon LilGun delivers the highest muzzle velocity at 1,699 fps; across all powders the maximum-charge window runs from 1,056 fps to 1,699 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 17 of the 63 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, 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. ADI AP 100, Baschieri & Pellagri 102 Pistol, Vihtavuori N32C Tin Star rank at the top here: for .357 Maximum with the .358 | 158gr | Rim Rock SWC Gas Check they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4100, Alliant 2400, Hodgdon LilGun 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.