Load Specifications
Load data in caliber .357 Maximum with .358 | 148gr | Rim Rock WC 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% | 38,058 psi | 85% | 1709 fps | 90.3% |
| Accurate No. 2² | <<locked>> | 64% | 36,593 psi | 81% | 1486 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 37,536 psi | 83% | 1690 fps | 98.7% |
| Accurate No. 9² | <<locked>> | 72% | 38,232 psi | 85% | 1699 fps | 95.5% |
| Accurate Solo 1000² | <<locked>> | 68% | 37,898 psi | 84% | 1391 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 39,697 psi | 88% | 1470 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 38,261 psi | 85% | 1696 fps | 96.5% |
| ADI AP 100 | <<locked>> | 84% | 38,595 psi | 86% | 1627 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 40,596 psi | 90% | 1329 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 39,929 psi | 89% | 1348 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 40,509 psi | 90% | 1394 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 37,115 psi | 83% | 1394 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 36,999 psi | 82% | 1706 fps | 92.8% |
| Alliant BE-86² | <<locked>> | 72% | 40,640 psi | 90% | 1463 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 38,435 psi | 85% | 1699 fps | 98.3% |
| Alliant BULLSEYE² | <<locked>> | 64% | 40,422 psi | 90% | 1562 fps | 100% |
| Alliant Green Dot² | <<locked>> | 68% | 37,884 psi | 84% | 1407 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 39,436 psi | 88% | 1545 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 37,855 psi | 84% | 1667 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 88% | 38,827 psi | 86% | 1762 fps | 88.1% |
| Alliant RED DOT² | <<locked>> | 72% | 39,624 psi | 88% | 1401 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 40,582 psi | 90% | 1565 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 38,421 psi | 85% | 1398 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 37,579 psi | 84% | 1394 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 38,392 psi | 85% | 1414 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 39,682 psi | 88% | 1345 fps | 100% |
| Hodgdon H110* | <<locked>> | 88% | 40,234 psi | 89% | 1785 fps | 87.8% |
| Hodgdon LilGun* | <<locked>> | 92% | 39,073 psi | 87% | 1818 fps | 94.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 22,452 psi | 50% | 1129 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 37,579 psi | 84% | 1457 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 37,536 psi | 83% | 1690 fps | 98.7% |
| Lovex D037.2² | <<locked>> | 72% | 39,262 psi | 87% | 1716 fps | 95.9% |
| Lovex S020² | <<locked>> | 64% | 38,667 psi | 86% | 1493 fps | 100% |
| Maxam CSB 1² | <<locked>> | 76% | 40,059 psi | 89% | 1467 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 36,927 psi | 82% | 1421 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 40,509 psi | 90% | 1450 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 38,406 psi | 85% | 1404 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 37,449 psi | 83% | 1342 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 80% | 36,390 psi | 81% | 1706 fps | 93.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 21,364 psi | 48% | 1148 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 40,277 psi | 90% | 1542 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 39,987 psi | 89% | 1709 fps | 99.8% |
| Rottweil P 806² | <<locked>> | 72% | 37,768 psi | 84% | 1640 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 39,262 psi | 87% | 1716 fps | 95.9% |
| Shooters World Major Pistol² | <<locked>> | 64% | 37,536 psi | 83% | 1690 fps | 98.7% |
| SNPE Vectan A0² | <<locked>> | 72% | 36,941 psi | 82% | 1476 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 39,943 psi | 89% | 1457 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 39,421 psi | 88% | 1473 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 40,553 psi | 90% | 1358 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 29,080 psi | 65% | 1565 fps | 92.4% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 37,260 psi | 83% | 1552 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 38,914 psi | 87% | 1470 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 39,059 psi | 87% | 1673 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 37,855 psi | 84% | 1526 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 37,289 psi | 83% | 1490 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 68% | 36,332 psi | 81% | 1552 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 80% | 36,564 psi | 81% | 1644 fps | 99.7% |
| Vihtavuori N105 | <<locked>> | 84% | 37,826 psi | 84% | 1690 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 37,072 psi | 82% | 1729 fps | 93.5% |
| Vihtavuori N320² | <<locked>> | 64% | 38,276 psi | 85% | 1401 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 39,885 psi | 89% | 1342 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 38,725 psi | 86% | 1463 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 37,376 psi | 83% | 1493 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 39,639 psi | 88% | 1591 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 39,131 psi | 87% | 1480 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% | 28,761 psi | 64% | 1549 fps | 85.3% |
| Accurate No. 2² | <<locked>> | 60% | 31,981 psi | 71% | 1424 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 32,590 psi | 72% | 1608 fps | 97.5% |
| Accurate No. 9*² | <<locked>> | 60% | 24,598 psi | 55% | 1447 fps | 88.5% |
| Accurate Solo 1000² | <<locked>> | 60% | 31,067 psi | 69% | 1299 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 28,718 psi | 64% | 1322 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 24,874 psi | 55% | 1447 fps | 90.1% |
| ADI AP 100² | <<locked>> | 60% | 19,725 psi | 44% | 1280 fps | 97.7% |
| ADI APS 350² | <<locked>> | 60% | 31,473 psi | 70% | 1207 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 30,255 psi | 67% | 1224 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 30,356 psi | 68% | 1257 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 33,344 psi | 74% | 1345 fps | 100% |
| Alliant 2400*² | <<locked>> | 68% | 24,903 psi | 55% | 1470 fps | 85.7% |
| Alliant BE-86² | <<locked>> | 60% | 29,588 psi | 66% | 1322 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 18,869 psi | 42% | 1293 fps | 88% |
| Alliant BULLSEYE² | <<locked>> | 60% | 35,868 psi | 80% | 1499 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 31,183 psi | 69% | 1319 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 21,509 psi | 48% | 1260 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 29,472 psi | 66% | 1526 fps | 99.9% |
| Alliant Power Pro 300-MP* | <<locked>> | 84% | 33,634 psi | 75% | 1673 fps | 85.4% |
| Alliant RED DOT² | <<locked>> | 60% | 29,979 psi | 67% | 1270 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 29,544 psi | 66% | 1411 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 30,966 psi | 69% | 1302 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | 8.8 gr | 60% | 20,697 psi | 46% | 1148 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 33,910 psi | 75% | 1358 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,860 psi | 58% | 1152 fps | 100% |
| Hodgdon H110* | <<locked>> | 84% | 34,882 psi | 78% | 1699 fps | 85.2% |
| Hodgdon LilGun* | <<locked>> | 80% | 25,222 psi | 56% | 1555 fps | 86.5% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 10,602 psi | 24% | 860 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 33,373 psi | 74% | 1401 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 32,590 psi | 72% | 1608 fps | 97.5% |
| Lovex D037.2*² | <<locked>> | 60% | 25,324 psi | 56% | 1463 fps | 89.1% |
| Lovex S020² | <<locked>> | 60% | 34,156 psi | 76% | 1434 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 26,905 psi | 60% | 1289 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 29,849 psi | 66% | 1325 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 29,559 psi | 66% | 1306 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 31,546 psi | 70% | 1312 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 33,576 psi | 75% | 1293 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 68% | 24,091 psi | 54% | 1463 fps | 86.4% |
| ReloadSwiss RS 14² | 5.1 gr | 60% | 9,805 psi | 22% | 860 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 28,645 psi | 64% | 1385 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 26,963 psi | 60% | 1483 fps | 96.8% |
| Rottweil P 806² | <<locked>> | 60% | 24,874 psi | 55% | 1437 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 25,324 psi | 56% | 1463 fps | 89.1% |
| Shooters World Major Pistol² | <<locked>> | 60% | 32,590 psi | 72% | 1608 fps | 97.5% |
| SNPE Vectan A0² | <<locked>> | 60% | 26,832 psi | 60% | 1325 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 32,126 psi | 71% | 1355 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 31,531 psi | 70% | 1371 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 33,721 psi | 75% | 1270 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 88% | 20,885 psi | 46% | 1381 fps | 86% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 23,772 psi | 53% | 1335 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 31,314 psi | 70% | 1368 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 33,968 psi | 76% | 1594 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 33,286 psi | 74% | 1463 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 29,950 psi | 67% | 1385 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 28,123 psi | 63% | 1430 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 19,653 psi | 44% | 1306 fps | 93.3% |
| Vihtavuori N105*² | <<locked>> | 60% | 16,882 psi | 38% | 1280 fps | 94.8% |
| Vihtavuori N110* | <<locked>> | 88% | 25,469 psi | 57% | 1512 fps | 86.9% |
| Vihtavuori N320² | <<locked>> | 60% | 34,316 psi | 76% | 1352 fps | 100% |
| Vihtavuori N32C Tin Star² | 6.8 gr | 60% | 17,463 psi | 39% | 1010 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 34,243 psi | 76% | 1407 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 29,805 psi | 66% | 1385 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 24,874 psi | 55% | 1365 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 28,326 psi | 63% | 1332 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 | 148gr | Rim Rock WC. Hodgdon LilGun delivers the highest muzzle velocity at 1,818 fps; across all powders the maximum-charge window runs from 1,129 fps to 1,818 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 48–90 %, 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 | 148gr | Rim Rock WC 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. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N32C Tin Star 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.