Load Specifications
Load data in caliber .357 Maximum with .356 | 147gr | Rim Rock FP 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% | 35,752 psi | 80% | 1667 fps | 88.7% |
| Accurate No. 2² | <<locked>> | 68% | 40,074 psi | 89% | 1522 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 35,984 psi | 80% | 1660 fps | 98.1% |
| Accurate No. 9*² | <<locked>> | 72% | 36,042 psi | 80% | 1660 fps | 94.3% |
| Accurate Solo 1000² | <<locked>> | 68% | 37,521 psi | 83% | 1381 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 38,159 psi | 85% | 1447 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 36,550 psi | 81% | 1663 fps | 95.5% |
| ADI AP 100 | <<locked>> | 84% | 37,260 psi | 83% | 1604 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 40,219 psi | 89% | 1316 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 39,073 psi | 87% | 1332 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 39,450 psi | 88% | 1371 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 40,045 psi | 89% | 1427 fps | 100% |
| Alliant 2400* | <<locked>> | 84% | 39,436 psi | 88% | 1739 fps | 93.2% |
| Alliant BE-86² | <<locked>> | 72% | 39,581 psi | 88% | 1447 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 36,492 psi | 81% | 1660 fps | 97.5% |
| Alliant BULLSEYE² | <<locked>> | 64% | 39,407 psi | 88% | 1542 fps | 100% |
| Alliant Green Dot² | <<locked>> | 72% | 40,190 psi | 89% | 1430 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 37,913 psi | 84% | 1522 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 36,187 psi | 80% | 1637 fps | 100% |
| Alliant RED DOT² | <<locked>> | 72% | 38,421 psi | 85% | 1381 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 39,117 psi | 87% | 1542 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 37,478 psi | 83% | 1381 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 88% | 40,277 psi | 90% | 1421 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 37,246 psi | 83% | 1394 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 38,885 psi | 86% | 1325 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 92% | 36,085 psi | 80% | 1768 fps | 92.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 21,901 psi | 49% | 1115 fps | 100% |
| Hodgdon Universal² | <<locked>> | 68% | 40,509 psi | 90% | 1490 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 35,984 psi | 80% | 1660 fps | 98.1% |
| Lovex D037.2*² | <<locked>> | 72% | 37,086 psi | 82% | 1677 fps | 94.7% |
| Lovex S020² | <<locked>> | 64% | 37,768 psi | 84% | 1476 fps | 100% |
| Maxam CSB 1² | <<locked>> | 76% | 39,320 psi | 87% | 1453 fps | 100% |
| Maxam CSB 2² | <<locked>> | 72% | 39,842 psi | 89% | 1453 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 39,566 psi | 88% | 1434 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 37,347 psi | 83% | 1385 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 40,437 psi | 90% | 1371 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 84% | 39,552 psi | 88% | 1749 fps | 94.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 20,827 psi | 46% | 1132 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 38,870 psi | 86% | 1522 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 38,290 psi | 85% | 1680 fps | 99.5% |
| Rottweil P 806² | <<locked>> | 72% | 35,737 psi | 79% | 1614 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 72% | 37,086 psi | 82% | 1677 fps | 94.7% |
| Shooters World Major Pistol² | <<locked>> | 64% | 35,984 psi | 80% | 1660 fps | 98.1% |
| SNPE Vectan A0² | <<locked>> | 76% | 39,987 psi | 89% | 1506 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 38,841 psi | 86% | 1437 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 38,232 psi | 85% | 1453 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 39,740 psi | 88% | 1339 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 27,514 psi | 61% | 1526 fps | 90.8% |
| SNPE Vectan BA7 1/2 | <<locked>> | 80% | 39,856 psi | 89% | 1581 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 37,478 psi | 83% | 1447 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 37,289 psi | 83% | 1644 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 36,521 psi | 81% | 1503 fps | 100% |
| Somchem MS200² | <<locked>> | 72% | 40,321 psi | 90% | 1522 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 72% | 39,494 psi | 88% | 1588 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 84% | 38,725 psi | 86% | 1670 fps | 99.8% |
| Vihtavuori N105 | <<locked>> | 84% | 35,737 psi | 79% | 1660 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 34,519 psi | 77% | 1683 fps | 91.9% |
| Vihtavuori N320² | <<locked>> | 64% | 37,115 psi | 83% | 1381 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 38,769 psi | 86% | 1322 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 37,101 psi | 83% | 1440 fps | 100% |
| Vihtavuori N340² | <<locked>> | 72% | 40,582 psi | 90% | 1526 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 38,624 psi | 86% | 1572 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 37,565 psi | 84% | 1453 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% | 31,125 psi | 69% | 1588 fps | 86.2% |
| Accurate No. 2² | <<locked>> | 60% | 31,531 psi | 70% | 1411 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 31,024 psi | 69% | 1575 fps | 96.6% |
| Accurate No. 9*² | <<locked>> | 60% | 23,337 psi | 52% | 1411 fps | 86.9% |
| Accurate Solo 1000² | <<locked>> | 60% | 30,429 psi | 68% | 1286 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 27,528 psi | 61% | 1299 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 23,583 psi | 52% | 1414 fps | 88.5% |
| ADI AP 100² | 9.8 gr | 60% | 19,014 psi | 42% | 1257 fps | 97% |
| ADI APS 350² | <<locked>> | 60% | 30,719 psi | 68% | 1191 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 29,646 psi | 66% | 1207 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 30,211 psi | 67% | 1250 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 32,764 psi | 73% | 1332 fps | 100% |
| Alliant 2400*² | <<locked>> | 72% | 26,963 psi | 60% | 1512 fps | 86.6% |
| Alliant BE-86² | <<locked>> | 60% | 28,805 psi | 64% | 1306 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 18,072 psi | 40% | 1266 fps | 86.6% |
| Alliant BULLSEYE² | <<locked>> | 60% | 35,418 psi | 79% | 1490 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 29,907 psi | 67% | 1293 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 20,653 psi | 46% | 1240 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 28,239 psi | 63% | 1499 fps | 99.7% |
| Alliant RED DOT² | <<locked>> | 60% | 29,167 psi | 65% | 1253 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 28,471 psi | 63% | 1388 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 29,834 psi | 66% | 1283 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | 8.4 gr | 60% | 20,175 psi | 45% | 1135 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 33,170 psi | 74% | 1345 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,164 psi | 56% | 1135 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 84% | 26,861 psi | 60% | 1591 fps | 87.3% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 10,153 psi | 23% | 843 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 32,851 psi | 73% | 1388 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 31,024 psi | 69% | 1575 fps | 96.6% |
| Lovex D037.2*² | <<locked>> | 60% | 24,047 psi | 53% | 1430 fps | 87.6% |
| Lovex S020² | <<locked>> | 60% | 33,170 psi | 74% | 1417 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 25,788 psi | 57% | 1266 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 29,167 psi | 65% | 1312 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 28,906 psi | 64% | 1289 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 30,908 psi | 69% | 1299 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 32,880 psi | 73% | 1276 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 72% | 26,165 psi | 58% | 1509 fps | 87.4% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 9,645 psi | 21% | 853 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 27,601 psi | 61% | 1365 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 26,034 psi | 58% | 1460 fps | 96.1% |
| Rottweil P 806² | <<locked>> | 60% | 23,728 psi | 53% | 1414 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 24,047 psi | 53% | 1430 fps | 87.6% |
| Shooters World Major Pistol² | <<locked>> | 60% | 31,024 psi | 69% | 1575 fps | 96.6% |
| SNPE Vectan A0² | <<locked>> | 60% | 25,860 psi | 58% | 1306 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 31,357 psi | 70% | 1342 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 30,705 psi | 68% | 1355 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 33,272 psi | 74% | 1257 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 92% | 22,046 psi | 49% | 1404 fps | 86.5% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 23,105 psi | 51% | 1319 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 30,313 psi | 67% | 1348 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 32,735 psi | 73% | 1575 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 32,460 psi | 72% | 1444 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 28,950 psi | 64% | 1365 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 27,456 psi | 61% | 1414 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 18,710 psi | 42% | 1276 fps | 92.1% |
| Vihtavuori N105*² | <<locked>> | 60% | 16,128 psi | 36% | 1257 fps | 93.7% |
| Vihtavuori N110* | <<locked>> | 88% | 23,960 psi | 53% | 1476 fps | 85.1% |
| Vihtavuori N320² | <<locked>> | 60% | 33,011 psi | 73% | 1329 fps | 100% |
| Vihtavuori N32C Tin Star² | 6.5 gr | 60% | 17,085 psi | 38% | 1001 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 33,141 psi | 74% | 1388 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 28,819 psi | 64% | 1368 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 23,612 psi | 53% | 1339 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 27,079 psi | 60% | 1309 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 | 147gr | Rim Rock FP. Hodgdon LilGun delivers the highest muzzle velocity at 1,768 fps; across all powders the maximum-charge window runs from 1,115 fps to 1,768 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 .356 | 147gr | Rim Rock FP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4100, Accurate No. 9, Alliant 2400 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.