Load Specifications
Load data in caliber .357 Mag. with .356 | 100gr | Berry's Flat Base Round Nose bullet and 65 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, Vihtavuori N350 and SNPE Vectan BA7 1/2.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 76% | 37,797 psi | 87% | 1713 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 35,099 psi | 81% | 1804 fps | 88% |
| Accurate Solo 1000 | <<locked>> | 80% | 38,870 psi | 89% | 1614 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 38,479 psi | 88% | 1673 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 37,985 psi | 87% | 1808 fps | 97.5% |
| ADI AP 70N² | <<locked>> | 68% | 36,898 psi | 85% | 1673 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 37,289 psi | 86% | 1463 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 39,276 psi | 90% | 1526 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 38,000 psi | 87% | 1565 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 38,029 psi | 87% | 1621 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 36,332 psi | 84% | 1627 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 37,072 psi | 85% | 1824 fps | 87.8% |
| Alliant BULLSEYE² | <<locked>> | 72% | 36,419 psi | 84% | 1729 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 38,159 psi | 88% | 1627 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 38,943 psi | 90% | 1759 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 84% | 39,247 psi | 90% | 1883 fps | 97.2% |
| Alliant RED DOT | <<locked>> | 80% | 36,390 psi | 84% | 1568 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 37,318 psi | 86% | 1749 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 38,392 psi | 88% | 1768 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 38,363 psi | 88% | 1608 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 39,001 psi | 90% | 1624 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 35,389 psi | 81% | 1581 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 38,305 psi | 88% | 1509 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 38,276 psi | 88% | 1791 fps | 99.5% |
| Hodgdon Longshot² | <<locked>> | 64% | 36,869 psi | 85% | 1762 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,360 psi | 38% | 1178 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 36,898 psi | 85% | 1673 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 35,099 psi | 81% | 1804 fps | 88% |
| Lovex S011² | <<locked>> | 68% | 37,898 psi | 87% | 1634 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 39,030 psi | 90% | 1719 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 38,928 psi | 89% | 1677 fps | 100% |
| Maxam CSB 2 | <<locked>> | 84% | 39,088 psi | 90% | 1677 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 36,608 psi | 84% | 1617 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 38,899 psi | 89% | 1624 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 39,073 psi | 90% | 1565 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 37,057 psi | 85% | 1739 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 38,014 psi | 87% | 1772 fps | 99.9% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 38,043 psi | 87% | 1647 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 14,881 psi | 34% | 1175 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 37,695 psi | 87% | 1745 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 37,028 psi | 85% | 1831 fps | 91.5% |
| Rottweil P 801² | <<locked>> | 68% | 38,537 psi | 89% | 1611 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 36,085 psi | 83% | 1837 fps | 99.5% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 35,099 psi | 81% | 1804 fps | 88% |
| SNPE Vectan A0 | <<locked>> | 84% | 36,260 psi | 83% | 1677 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 36,695 psi | 84% | 1627 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 35,679 psi | 82% | 1637 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 36,985 psi | 85% | 1496 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 38,783 psi | 89% | 1775 fps | 99.9% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 38,392 psi | 88% | 1683 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 35,679 psi | 82% | 1827 fps | 97.5% |
| Somchem MP200² | <<locked>> | 76% | 37,405 psi | 86% | 1739 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 36,376 psi | 84% | 1696 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 38,522 psi | 89% | 1831 fps | 95.1% |
| Vihtavuori 3N37 | <<locked>> | 84% | 38,290 psi | 88% | 1798 fps | 100% |
| Vihtavuori 3N38* | <<locked>> | 96% | 37,942 psi | 87% | 1831 fps | 92.7% |
| Vihtavuori N105*ᴾ | <<locked>> | 100% | 33,837 psi | 78% | 1827 fps | 94.9% |
| Vihtavuori N310² | <<locked>> | 64% | 38,116 psi | 88% | 1512 fps | 100% |
| Vihtavuori N320² | <<locked>> | 76% | 37,869 psi | 87% | 1614 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 35,897 psi | 83% | 1490 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 36,187 psi | 83% | 1660 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 36,274 psi | 83% | 1696 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 38,696 psi | 89% | 1798 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 35,911 psi | 83% | 1627 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 37,724 psi | 87% | 1680 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 22,568 psi | 52% | 1430 fps | 98.8% |
| Accurate No. 7*² | <<locked>> | 72% | 30,211 psi | 69% | 1709 fps | 85.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 23,859 psi | 55% | 1371 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 20,073 psi | 46% | 1348 fps | 100% |
| ADI AP 100*² | <<locked>> | 72% | 18,666 psi | 43% | 1378 fps | 86.3% |
| ADI AP 70N² | <<locked>> | 60% | 28,979 psi | 67% | 1542 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,179 psi | 60% | 1293 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 24,758 psi | 57% | 1302 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 23,525 psi | 54% | 1329 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 25,121 psi | 58% | 1411 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 21,103 psi | 49% | 1362 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 33,649 psi | 77% | 1762 fps | 85.9% |
| Alliant BULLSEYE² | <<locked>> | 60% | 25,933 psi | 60% | 1539 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 23,061 psi | 53% | 1371 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 14,895 psi | 34% | 1240 fps | 96.2% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 19,348 psi | 44% | 1430 fps | 85.6% |
| Alliant RED DOT² | <<locked>> | 60% | 22,727 psi | 52% | 1335 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 29,298 psi | 67% | 1608 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 20,349 psi | 47% | 1411 fps | 99.2% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 22,481 psi | 52% | 1352 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,431 psi | 33% | 1178 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 24,526 psi | 56% | 1411 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 20,813 psi | 48% | 1227 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 28,993 psi | 67% | 1624 fps | 97.4% |
| Hodgdon Longshot² | <<locked>> | 60% | 32,082 psi | 74% | 1680 fps | 99.3% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,556 psi | 17% | 873 fps | 99.8% |
| Hodgdon Universal² | <<locked>> | 60% | 24,337 psi | 56% | 1457 fps | 100% |
| Lovex D037.1*² | <<locked>> | 72% | 30,211 psi | 69% | 1709 fps | 85.2% |
| Lovex S011² | <<locked>> | 60% | 29,892 psi | 69% | 1516 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 23,641 psi | 54% | 1460 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,261 psi | 44% | 1325 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 20,740 psi | 48% | 1371 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,031 psi | 51% | 1365 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 23,337 psi | 54% | 1371 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 26,571 psi | 61% | 1378 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 28,601 psi | 66% | 1594 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 33,083 psi | 76% | 1693 fps | 99.4% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 27,137 psi | 62% | 1480 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,150 psi | 16% | 866 fps | 97.2% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 18,550 psi | 43% | 1378 fps | 99.7% |
| ReloadSwiss RS 24*² | <<locked>> | 76% | 28,761 psi | 66% | 1667 fps | 87% |
| Rottweil P 801² | <<locked>> | 60% | 30,922 psi | 71% | 1503 fps | 100% |
| Rottweil P 806*² | 12.9 gr | 64% | 15,795 psi | 36% | 1362 fps | 88.1% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 30,211 psi | 69% | 1709 fps | 85.2% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,276 psi | 44% | 1342 fps | 98.8% |
| SNPE Vectan A1² | <<locked>> | 60% | 23,859 psi | 55% | 1414 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 23,018 psi | 53% | 1414 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 27,934 psi | 64% | 1358 fps | 100% |
| SNPE Vectan BA7 1/2*² | 8.9 gr | 60% | 16,259 psi | 37% | 1283 fps | 90% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 22,452 psi | 52% | 1407 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 20,943 psi | 48% | 1496 fps | 89.4% |
| Somchem MP200² | <<locked>> | 60% | 23,409 psi | 54% | 1476 fps | 99.5% |
| Somchem MS200² | <<locked>> | 60% | 21,321 psi | 49% | 1407 fps | 99.8% |
| Somchem S221*² | <<locked>> | 60% | 25,527 psi | 59% | 1568 fps | 88.4% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 18,318 psi | 42% | 1375 fps | 93.2% |
| Vihtavuori 3N38* | <<locked>> | 84% | 26,774 psi | 62% | 1611 fps | 86.6% |
| Vihtavuori N105* | <<locked>> | 84% | 20,508 psi | 47% | 1516 fps | 85.3% |
| Vihtavuori N310² | <<locked>> | 60% | 33,924 psi | 78% | 1457 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 24,323 psi | 56% | 1404 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 14,315 psi | 33% | 1106 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 22,524 psi | 52% | 1427 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 20,262 psi | 47% | 1388 fps | 99.4% |
| Vihtavuori N350*² | 8.8 gr | 60% | 16,810 psi | 39% | 1329 fps | 92.2% |
| Winchester 231² | <<locked>> | 60% | 31,212 psi | 72% | 1555 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 19,740 psi | 45% | 1352 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 Mag. loaded with the .356 | 100gr | Berry's Flat Base Round Nose. Alliant POWER PISTOL delivers the highest muzzle velocity at 1,883 fps; across all powders the maximum-charge window runs from 1,175 fps to 1,883 fps. ADI AP 100 gives the best case fill at 100 %, and 35 of the 65 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 34–90 %, leaving at least 10 % headroom. ADI AP 100, Alliant BLUE DOT, Alliant Herco 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. Rottweil P 806, Vihtavuori N350, SNPE Vectan BA7 1/2 rank at the top here: for .357 Mag. with the .356 | 100gr | Berry's Flat Base Round Nose they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 7, Alliant BLUE DOT, Lovex D037.1 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.