Load Specifications
Load data in caliber .357 Maximum with .357 | 148gr | Berry's HBWC bullet and 61 powders. The key underlying parameters are shown in the table above.
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% | 40,524 psi | 90% | 1742 fps | 91.5% |
| Accurate No. 2² | <<locked>> | 64% | 38,189 psi | 85% | 1499 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 40,335 psi | 90% | 1722 fps | 99.2% |
| Accurate No. 9² | <<locked>> | 72% | 40,379 psi | 90% | 1726 fps | 96.3% |
| Accurate Solo 1000² | <<locked>> | 68% | 39,117 psi | 87% | 1401 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 40,611 psi | 90% | 1473 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 40,364 psi | 90% | 1719 fps | 97.1% |
| ADI AP 100 | <<locked>> | 84% | 40,306 psi | 90% | 1644 fps | 100% |
| ADI APS 350² | <<locked>> | 68% | 38,174 psi | 85% | 1293 fps | 100% |
| ADI APS 450² | <<locked>> | 68% | 37,101 psi | 83% | 1312 fps | 100% |
| ADI AS 30² | <<locked>> | 68% | 38,014 psi | 85% | 1355 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 38,696 psi | 86% | 1407 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 39,421 psi | 88% | 1739 fps | 93.8% |
| Alliant BE-86² | <<locked>> | 68% | 38,232 psi | 85% | 1427 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 40,538 psi | 90% | 1722 fps | 98.8% |
| Alliant Green Dot² | <<locked>> | 68% | 38,856 psi | 86% | 1414 fps | 100% |
| Alliant Herco | <<locked>> | 80% | 37,565 psi | 84% | 1512 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 39,668 psi | 88% | 1686 fps | 100% |
| Alliant RED DOT² | <<locked>> | 72% | 40,509 psi | 90% | 1404 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 68% | 38,203 psi | 85% | 1526 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 39,276 psi | 87% | 1401 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 39,262 psi | 87% | 1407 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 39,958 psi | 89% | 1424 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 40,001 psi | 89% | 1345 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 88% | 36,651 psi | 82% | 1772 fps | 93.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 24,178 psi | 54% | 1142 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 38,943 psi | 87% | 1463 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 40,335 psi | 90% | 1722 fps | 99.2% |
| Lovex D037.2*² | <<locked>> | 68% | 36,085 psi | 80% | 1657 fps | 94.8% |
| Lovex S020² | <<locked>> | 64% | 40,640 psi | 90% | 1506 fps | 100% |
| Maxam CSB 1² | <<locked>> | 72% | 37,956 psi | 84% | 1434 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 39,073 psi | 87% | 1437 fps | 100% |
| Maxam CSB 3² | <<locked>> | 68% | 38,159 psi | 85% | 1414 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 39,827 psi | 89% | 1414 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 38,769 psi | 86% | 1352 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 80% | 39,566 psi | 88% | 1745 fps | 94.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 22,945 psi | 51% | 1158 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 68% | 37,753 psi | 84% | 1503 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 68% | 37,173 psi | 83% | 1660 fps | 99.6% |
| Rottweil P 806² | <<locked>> | 68% | 36,114 psi | 80% | 1604 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 68% | 36,085 psi | 80% | 1657 fps | 94.8% |
| Shooters World Major Pistol² | <<locked>> | 64% | 40,335 psi | 90% | 1722 fps | 99.2% |
| SNPE Vectan A0² | <<locked>> | 72% | 38,377 psi | 85% | 1486 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 64% | 37,217 psi | 83% | 1417 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 64% | 36,724 psi | 82% | 1434 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 64% | 37,695 psi | 84% | 1319 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 31,241 psi | 69% | 1594 fps | 93.6% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 38,943 psi | 87% | 1568 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 40,553 psi | 90% | 1483 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 39,001 psi | 87% | 1532 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 38,957 psi | 87% | 1503 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 68% | 38,276 psi | 85% | 1572 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 80% | 38,740 psi | 86% | 1667 fps | 99.9% |
| Vihtavuori N105 | <<locked>> | 84% | 40,422 psi | 90% | 1716 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 39,668 psi | 88% | 1762 fps | 94.5% |
| Vihtavuori N320² | <<locked>> | 64% | 39,320 psi | 87% | 1407 fps | 100% |
| Vihtavuori N32C Tin Star | <<locked>> | 96% | 38,696 psi | 86% | 1319 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 40,582 psi | 90% | 1476 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 39,175 psi | 87% | 1506 fps | 100% |
| Vihtavuori N350² | <<locked>> | 72% | 37,333 psi | 83% | 1552 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 68% | 36,550 psi | 81% | 1437 fps | 100% |
Start Load - Barrel Length: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4100*² | <<locked>> | 76% | 31,198 psi | 69% | 1585 fps | 86.9% |
| Accurate No. 2² | <<locked>> | 60% | 33,504 psi | 75% | 1437 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 34,867 psi | 78% | 1634 fps | 98.1% |
| Accurate No. 9*² | <<locked>> | 60% | 26,760 psi | 60% | 1483 fps | 90.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 32,314 psi | 72% | 1312 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 29,805 psi | 66% | 1329 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 26,977 psi | 60% | 1483 fps | 91.6% |
| ADI AP 100² | <<locked>> | 60% | 21,408 psi | 48% | 1309 fps | 98.6% |
| ADI APS 350² | <<locked>> | 60% | 31,850 psi | 71% | 1207 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 31,227 psi | 69% | 1230 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 31,836 psi | 71% | 1270 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 34,983 psi | 78% | 1358 fps | 100% |
| Alliant 2400*² | <<locked>> | 64% | 24,192 psi | 54% | 1437 fps | 85.1% |
| Alliant BE-86² | <<locked>> | 60% | 30,763 psi | 68% | 1329 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 20,842 psi | 46% | 1332 fps | 90% |
| Alliant Green Dot² | <<locked>> | 60% | 32,198 psi | 72% | 1322 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 23,380 psi | 52% | 1283 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 31,314 psi | 70% | 1549 fps | 100% |
| Alliant RED DOT² | <<locked>> | 60% | 31,009 psi | 69% | 1276 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 30,966 psi | 69% | 1417 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 31,995 psi | 71% | 1306 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 22,437 psi | 50% | 1165 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 35,491 psi | 79% | 1371 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 26,411 psi | 59% | 1155 fps | 100% |
| Hodgdon LilGun*² | <<locked>> | 76% | 24,410 psi | 54% | 1526 fps | 85.9% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 11,966 psi | 27% | 873 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 35,288 psi | 78% | 1417 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 34,867 psi | 78% | 1634 fps | 98.1% |
| Lovex D037.2*² | <<locked>> | 60% | 27,470 psi | 61% | 1499 fps | 90.6% |
| Lovex S020² | <<locked>> | 60% | 36,129 psi | 80% | 1450 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 28,021 psi | 62% | 1293 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 32,010 psi | 71% | 1342 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 31,111 psi | 69% | 1319 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 32,460 psi | 72% | 1319 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 34,940 psi | 78% | 1302 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 64% | 23,337 psi | 52% | 1430 fps | 85.8% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 11,589 psi | 26% | 886 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 29,950 psi | 67% | 1391 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 28,877 psi | 64% | 1512 fps | 97.6% |
| Rottweil P 806² | <<locked>> | 60% | 27,920 psi | 62% | 1476 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 27,470 psi | 61% | 1499 fps | 90.6% |
| Shooters World Major Pistol² | <<locked>> | 60% | 34,867 psi | 78% | 1634 fps | 98.1% |
| SNPE Vectan A0² | <<locked>> | 60% | 28,326 psi | 63% | 1342 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 33,460 psi | 74% | 1368 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 32,924 psi | 73% | 1381 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 34,084 psi | 76% | 1273 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 84% | 20,711 psi | 46% | 1362 fps | 85.9% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 25,396 psi | 56% | 1355 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 32,967 psi | 73% | 1381 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 35,041 psi | 78% | 1476 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 31,604 psi | 70% | 1401 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 30,023 psi | 67% | 1450 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 21,712 psi | 48% | 1345 fps | 94.9% |
| Vihtavuori N105² | <<locked>> | 60% | 19,218 psi | 43% | 1325 fps | 96.7% |
| Vihtavuori N110* | <<locked>> | 84% | 25,048 psi | 56% | 1493 fps | 86.7% |
| Vihtavuori N320² | <<locked>> | 60% | 35,375 psi | 79% | 1358 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 19,232 psi | 43% | 1027 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 36,085 psi | 80% | 1421 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 31,604 psi | 70% | 1404 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 26,281 psi | 58% | 1381 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 29,631 psi | 66% | 1339 fps | 100% |
* 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 61 powders for .357 Maximum loaded with the .357 | 148gr | Berry's HBWC . Hodgdon LilGun delivers the highest muzzle velocity at 1,772 fps; across all powders the maximum-charge window runs from 1,142 fps to 1,772 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 16 of the 61 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 51–90 %, 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. 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.