Load Specifications
Load data in caliber .357 Maximum with .356 | 148gr | Rim Rock TC bullet and 63 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% | 37,028 psi | 82% | 1690 fps | 89.7% |
| Accurate No. 2² | <<locked>> | 64% | 36,361 psi | 81% | 1480 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 37,144 psi | 83% | 1680 fps | 98.6% |
| Accurate No. 9² | <<locked>> | 72% | 37,536 psi | 83% | 1686 fps | 95.2% |
| Accurate Solo 1000² | <<locked>> | 68% | 37,594 psi | 84% | 1385 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 38,841 psi | 86% | 1453 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 37,536 psi | 83% | 1680 fps | 96.1% |
| ADI AP 100 | <<locked>> | 84% | 38,101 psi | 85% | 1617 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 40,263 psi | 90% | 1316 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 39,711 psi | 88% | 1342 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 40,219 psi | 89% | 1385 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 36,782 psi | 82% | 1388 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 36,318 psi | 81% | 1690 fps | 92.3% |
| Alliant BE-86² | <<locked>> | 72% | 40,611 psi | 90% | 1457 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 37,637 psi | 84% | 1683 fps | 98.1% |
| Alliant BULLSEYE² | <<locked>> | 64% | 40,147 psi | 89% | 1552 fps | 100% |
| Alliant Green Dot² | <<locked>> | 68% | 37,579 psi | 84% | 1401 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 38,885 psi | 86% | 1532 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 37,217 psi | 83% | 1650 fps | 100% |
| Alliant RED DOT² | <<locked>> | 72% | 39,262 psi | 87% | 1391 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 39,755 psi | 88% | 1549 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 37,492 psi | 83% | 1381 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 88% | 40,582 psi | 90% | 1424 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 37,971 psi | 84% | 1404 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 39,479 psi | 88% | 1335 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 92% | 38,014 psi | 85% | 1798 fps | 94% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 22,147 psi | 49% | 1119 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 37,333 psi | 83% | 1450 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 37,144 psi | 83% | 1680 fps | 98.6% |
| Lovex D037.2² | <<locked>> | 72% | 38,580 psi | 86% | 1699 fps | 95.5% |
| Lovex S020² | <<locked>> | 64% | 38,435 psi | 85% | 1483 fps | 100% |
| Maxam CSB 1² | <<locked>> | 76% | 39,900 psi | 89% | 1460 fps | 100% |
| Maxam CSB 2² | <<locked>> | 72% | 40,567 psi | 90% | 1460 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 39,595 psi | 88% | 1434 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 38,116 psi | 85% | 1394 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 40,509 psi | 90% | 1375 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 80% | 35,810 psi | 80% | 1690 fps | 93.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 21,031 psi | 47% | 1138 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 39,508 psi | 88% | 1529 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 39,581 psi | 88% | 1699 fps | 99.8% |
| Rottweil P 806² | <<locked>> | 72% | 36,912 psi | 82% | 1631 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 38,580 psi | 86% | 1699 fps | 95.5% |
| Shooters World Major Pistol² | <<locked>> | 64% | 37,144 psi | 83% | 1680 fps | 98.6% |
| SNPE Vectan A0² | <<locked>> | 76% | 40,480 psi | 90% | 1512 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 39,305 psi | 87% | 1444 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 38,725 psi | 86% | 1460 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 40,350 psi | 90% | 1348 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 28,616 psi | 64% | 1552 fps | 92% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 36,753 psi | 82% | 1542 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 38,754 psi | 86% | 1463 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 38,392 psi | 85% | 1660 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 37,115 psi | 83% | 1509 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 37,115 psi | 83% | 1483 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 72% | 40,408 psi | 90% | 1601 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 84% | 40,059 psi | 89% | 1690 fps | 99.9% |
| Vihtavuori N105 | <<locked>> | 84% | 37,333 psi | 83% | 1680 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 35,984 psi | 80% | 1706 fps | 92.9% |
| Vihtavuori N320² | <<locked>> | 64% | 37,956 psi | 84% | 1394 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 39,827 psi | 89% | 1335 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 37,840 psi | 84% | 1450 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 37,202 psi | 83% | 1486 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 39,001 psi | 87% | 1578 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 38,522 psi | 86% | 1467 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% | 32,343 psi | 72% | 1611 fps | 87.3% |
| Accurate No. 2² | <<locked>> | 60% | 31,691 psi | 70% | 1414 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 31,749 psi | 71% | 1588 fps | 97.1% |
| Accurate No. 9*² | <<locked>> | 60% | 24,265 psi | 54% | 1434 fps | 88.1% |
| Accurate Solo 1000² | <<locked>> | 60% | 30,676 psi | 68% | 1289 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 28,355 psi | 63% | 1312 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 24,192 psi | 54% | 1427 fps | 89.4% |
| ADI AP 100² | <<locked>> | 60% | 19,508 psi | 43% | 1270 fps | 97.5% |
| ADI APS 350² | <<locked>> | 60% | 31,009 psi | 69% | 1198 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 30,429 psi | 68% | 1220 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 30,516 psi | 68% | 1257 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 32,967 psi | 73% | 1335 fps | 100% |
| Alliant 2400*² | <<locked>> | 68% | 24,569 psi | 55% | 1460 fps | 85.2% |
| Alliant BE-86² | <<locked>> | 60% | 28,863 psi | 64% | 1306 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 18,478 psi | 41% | 1276 fps | 87.4% |
| Alliant BULLSEYE² | <<locked>> | 60% | 35,549 psi | 79% | 1493 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 30,792 psi | 68% | 1306 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 21,219 psi | 47% | 1250 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 28,790 psi | 64% | 1509 fps | 99.8% |
| Alliant RED DOT² | <<locked>> | 60% | 29,515 psi | 66% | 1260 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 29,225 psi | 65% | 1401 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 30,632 psi | 68% | 1293 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | 8.6 gr | 60% | 20,407 psi | 45% | 1142 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 33,910 psi | 75% | 1355 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,454 psi | 57% | 1142 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 80% | 24,352 psi | 54% | 1532 fps | 85.6% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 10,211 psi | 23% | 843 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 33,011 psi | 73% | 1391 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 31,749 psi | 71% | 1588 fps | 97.1% |
| Lovex D037.2*² | <<locked>> | 60% | 24,642 psi | 55% | 1444 fps | 88.4% |
| Lovex S020² | <<locked>> | 60% | 33,881 psi | 75% | 1424 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 26,542 psi | 59% | 1280 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 29,457 psi | 66% | 1316 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 29,733 psi | 66% | 1302 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 31,169 psi | 69% | 1302 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 33,765 psi | 75% | 1289 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 68% | 23,467 psi | 52% | 1447 fps | 85.7% |
| ReloadSwiss RS 14² | 5 gr | 60% | 9,732 psi | 22% | 853 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 27,804 psi | 62% | 1368 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 26,876 psi | 60% | 1476 fps | 96.7% |
| Rottweil P 806² | <<locked>> | 60% | 24,482 psi | 54% | 1427 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 24,642 psi | 55% | 1444 fps | 88.4% |
| Shooters World Major Pistol² | <<locked>> | 60% | 31,749 psi | 71% | 1588 fps | 97.1% |
| SNPE Vectan A0² | <<locked>> | 60% | 26,556 psi | 59% | 1319 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 31,937 psi | 71% | 1348 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 31,314 psi | 70% | 1362 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 33,388 psi | 74% | 1260 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 88% | 20,682 psi | 46% | 1371 fps | 85.6% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 23,583 psi | 52% | 1325 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 31,038 psi | 69% | 1358 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 33,823 psi | 75% | 1591 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 33,069 psi | 74% | 1453 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 29,675 psi | 66% | 1378 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 27,963 psi | 62% | 1424 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 19,160 psi | 43% | 1289 fps | 92.8% |
| Vihtavuori N105*² | <<locked>> | 60% | 16,650 psi | 37% | 1270 fps | 94.5% |
| Vihtavuori N110* | <<locked>> | 88% | 24,845 psi | 55% | 1496 fps | 86.2% |
| Vihtavuori N320² | <<locked>> | 60% | 33,910 psi | 75% | 1342 fps | 100% |
| Vihtavuori N32C Tin Star² | 6.7 gr | 60% | 17,434 psi | 39% | 1007 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 33,939 psi | 75% | 1401 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 29,515 psi | 66% | 1378 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 24,192 psi | 54% | 1352 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 27,659 psi | 62% | 1316 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 .356 | 148gr | Rim Rock TC. Hodgdon LilGun delivers the highest muzzle velocity at 1,798 fps; across all powders the maximum-charge window runs from 1,119 fps to 1,798 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 16 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 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 .356 | 148gr | Rim Rock TC 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. 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.