Load Specifications
Load data in caliber .357 Mag. with .356 | 125gr | H&N KS F bullet and 68 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, SNPE Vectan BA7 1/2 and Vihtavuori N350.
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. 2 | <<locked>> | 80% | 38,899 psi | 89% | 1470 fps | 100% |
| Accurate No. 5² | <<locked>> | 64% | 36,883 psi | 85% | 1545 fps | 99.1% |
| Accurate No. 7* | <<locked>> | 80% | 35,955 psi | 83% | 1585 fps | 90.2% |
| Accurate Solo 1000 | <<locked>> | 80% | 37,217 psi | 86% | 1348 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 35,911 psi | 83% | 1398 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 34,650 psi | 80% | 1509 fps | 97.5% |
| ADI AP 70N² | <<locked>> | 72% | 37,826 psi | 87% | 1440 fps | 100% |
| ADI APS 350 | <<locked>> | 80% | 38,711 psi | 89% | 1247 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 37,985 psi | 87% | 1276 fps | 100% |
| ADI AS 30 | <<locked>> | 84% | 38,682 psi | 89% | 1335 fps | 100% |
| ADI AS 50N | <<locked>> | 80% | 38,653 psi | 89% | 1385 fps | 100% |
| Alliant BE-86 | <<locked>> | 84% | 37,304 psi | 86% | 1401 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 33,533 psi | 77% | 1532 fps | 87.8% |
| Alliant BULLSEYE² | <<locked>> | 76% | 37,768 psi | 87% | 1496 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 36,724 psi | 84% | 1358 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 35,389 psi | 81% | 1470 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 84% | 36,419 psi | 84% | 1588 fps | 97.5% |
| Alliant RED DOT | <<locked>> | 84% | 37,289 psi | 86% | 1342 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 34,954 psi | 80% | 1463 fps | 100% |
| Alliant UNIQUE | <<locked>> | 88% | 38,740 psi | 89% | 1519 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 35,839 psi | 82% | 1339 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 35,984 psi | 83% | 1355 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 36,985 psi | 85% | 1371 fps | 100% |
| Hodgdon Clays | <<locked>> | 92% | 39,073 psi | 90% | 1286 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 35,157 psi | 81% | 1499 fps | 99.6% |
| Hodgdon Longshot² | <<locked>> | 68% | 38,464 psi | 88% | 1539 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 14,083 psi | 32% | 965 fps | 100% |
| Hodgdon Universal | <<locked>> | 80% | 37,826 psi | 87% | 1440 fps | 100% |
| Lovex D036² | <<locked>> | 64% | 36,869 psi | 85% | 1542 fps | 99% |
| Lovex D037.1* | <<locked>> | 80% | 35,955 psi | 83% | 1585 fps | 90.2% |
| Lovex S011² | <<locked>> | 68% | 36,042 psi | 83% | 1368 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 35,346 psi | 81% | 1427 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 36,289 psi | 83% | 1398 fps | 100% |
| Maxam CSB 2 | <<locked>> | 88% | 39,088 psi | 90% | 1437 fps | 100% |
| Maxam CSB 3 | <<locked>> | 84% | 37,304 psi | 86% | 1385 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 36,463 psi | 84% | 1352 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 36,985 psi | 85% | 1302 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 72% | 38,580 psi | 89% | 1509 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 34,896 psi | 80% | 1483 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 76% | 38,624 psi | 89% | 1414 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 12,459 psi | 29% | 961 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 88% | 38,319 psi | 88% | 1503 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 88% | 37,913 psi | 87% | 1601 fps | 93.4% |
| Rottweil P 801² | <<locked>> | 72% | 39,102 psi | 90% | 1381 fps | 100% |
| Rottweil P 806 | <<locked>> | 92% | 35,360 psi | 81% | 1598 fps | 99.9% |
| Shooters World Auto Pistol² | <<locked>> | 64% | 36,869 psi | 85% | 1542 fps | 99% |
| Shooters World Major Pistol* | <<locked>> | 80% | 35,955 psi | 83% | 1585 fps | 90.2% |
| SNPE Vectan A0 | <<locked>> | 88% | 37,115 psi | 85% | 1444 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 80% | 38,058 psi | 87% | 1401 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 80% | 37,028 psi | 85% | 1411 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 76% | 38,972 psi | 90% | 1289 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 96% | 39,059 psi | 90% | 1529 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 84% | 39,175 psi | 90% | 1447 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 80% | 36,274 psi | 83% | 1594 fps | 98.7% |
| Somchem MP200 | <<locked>> | 80% | 38,682 psi | 89% | 1506 fps | 100% |
| Somchem MS200 | <<locked>> | 84% | 37,159 psi | 85% | 1460 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 34,954 psi | 80% | 1532 fps | 95.1% |
| Vihtavuori 3N37 | <<locked>> | 88% | 39,175 psi | 90% | 1555 fps | 100% |
| Vihtavuori 3N38*ᴾ | <<locked>> | 100% | 34,969 psi | 80% | 1542 fps | 93% |
| Vihtavuori N105*ᴾ | <<locked>> | 100% | 29,617 psi | 68% | 1519 fps | 94.7% |
| Vihtavuori N310² | <<locked>> | 64% | 38,624 psi | 89% | 1283 fps | 100% |
| Vihtavuori N320² | <<locked>> | 76% | 36,332 psi | 84% | 1355 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 27,630 psi | 64% | 1175 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 35,433 psi | 81% | 1407 fps | 100% |
| Vihtavuori N340 | <<locked>> | 84% | 37,782 psi | 87% | 1467 fps | 100% |
| Vihtavuori N350 | <<locked>> | 92% | 37,724 psi | 87% | 1529 fps | 100% |
| Winchester 231² | <<locked>> | 68% | 37,463 psi | 86% | 1404 fps | 100% |
| Winchester AutoComp | <<locked>> | 88% | 38,319 psi | 88% | 1444 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% | 20,885 psi | 48% | 1194 fps | 99% |
| Accurate No. 5² | <<locked>> | 60% | 31,430 psi | 72% | 1463 fps | 97.8% |
| Accurate No. 7*² | <<locked>> | 76% | 30,777 psi | 71% | 1503 fps | 87.6% |
| Accurate Solo 1000² | <<locked>> | 60% | 22,510 psi | 52% | 1142 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 18,434 psi | 42% | 1129 fps | 100% |
| ADI AP 100*² | <<locked>> | 72% | 16,578 psi | 38% | 1145 fps | 86.2% |
| ADI AP 70N² | <<locked>> | 60% | 25,918 psi | 60% | 1280 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 25,164 psi | 58% | 1076 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 23,801 psi | 55% | 1089 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 21,712 psi | 50% | 1106 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 22,960 psi | 53% | 1171 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 18,463 psi | 42% | 1122 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 29,501 psi | 68% | 1460 fps | 85.4% |
| Alliant BULLSEYE² | <<locked>> | 60% | 24,207 psi | 56% | 1289 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 22,640 psi | 52% | 1155 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 12,560 psi | 29% | 1014 fps | 95.7% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 17,158 psi | 39% | 1191 fps | 85.7% |
| Alliant RED DOT² | <<locked>> | 60% | 20,465 psi | 47% | 1102 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 27,470 psi | 63% | 1348 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 17,927 psi | 41% | 1165 fps | 99.2% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 20,856 psi | 48% | 1129 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 12,604 psi | 29% | 974 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 22,133 psi | 51% | 1178 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 19,682 psi | 45% | 1020 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 25,962 psi | 60% | 1348 fps | 97.3% |
| Hodgdon Longshot² | <<locked>> | 60% | 29,167 psi | 67% | 1404 fps | 99.3% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 5,773 psi | 13% | 692 fps | 99% |
| Hodgdon Universal² | <<locked>> | 60% | 21,640 psi | 50% | 1204 fps | 100% |
| Lovex D036² | <<locked>> | 60% | 31,386 psi | 72% | 1460 fps | 97.8% |
| Lovex D037.1*² | <<locked>> | 76% | 30,777 psi | 71% | 1503 fps | 87.6% |
| Lovex S011² | <<locked>> | 60% | 27,833 psi | 64% | 1257 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 21,335 psi | 49% | 1214 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 17,013 psi | 39% | 1089 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 18,057 psi | 42% | 1132 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 20,146 psi | 46% | 1135 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 21,930 psi | 50% | 1145 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 24,845 psi | 57% | 1145 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 26,165 psi | 60% | 1332 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 30,385 psi | 70% | 1417 fps | 99.5% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 23,786 psi | 55% | 1217 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,294 psi | 12% | 682 fps | 94.7% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 16,708 psi | 38% | 1152 fps | 99.8% |
| ReloadSwiss RS 24*² | <<locked>> | 76% | 25,933 psi | 60% | 1394 fps | 87.1% |
| Rottweil P 801² | <<locked>> | 60% | 27,514 psi | 63% | 1240 fps | 100% |
| Rottweil P 806*² | 9.9 gr | 64% | 12,357 psi | 28% | 1102 fps | 86.1% |
| Shooters World Auto Pistol² | <<locked>> | 60% | 31,386 psi | 72% | 1460 fps | 97.8% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 30,777 psi | 71% | 1503 fps | 87.6% |
| SNPE Vectan A0² | <<locked>> | 60% | 17,434 psi | 40% | 1112 fps | 98.9% |
| SNPE Vectan A1² | <<locked>> | 60% | 22,162 psi | 51% | 1178 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 21,350 psi | 49% | 1181 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 26,208 psi | 60% | 1129 fps | 100% |
| SNPE Vectan BA7 1/2*² | 6.8 gr | 60% | 14,141 psi | 33% | 1053 fps | 89.5% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 20,291 psi | 47% | 1168 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 18,159 psi | 42% | 1243 fps | 89.3% |
| Somchem MP200² | <<locked>> | 60% | 21,335 psi | 49% | 1234 fps | 99.6% |
| Somchem MS200² | <<locked>> | 60% | 19,305 psi | 44% | 1171 fps | 99.9% |
| Somchem S221*² | <<locked>> | 60% | 22,379 psi | 51% | 1302 fps | 88.1% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 16,288 psi | 37% | 1142 fps | 93.3% |
| Vihtavuori 3N38* | <<locked>> | 84% | 22,394 psi | 51% | 1316 fps | 85.4% |
| Vihtavuori N105* | <<locked>> | 88% | 20,146 psi | 46% | 1322 fps | 87.8% |
| Vihtavuori N310² | <<locked>> | 60% | 34,214 psi | 79% | 1237 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 22,727 psi | 52% | 1171 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 10,776 psi | 25% | 869 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 21,234 psi | 49% | 1204 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 18,550 psi | 43% | 1161 fps | 99.6% |
| Vihtavuori N350*² | 6.7 gr | 60% | 14,025 psi | 32% | 1076 fps | 91.2% |
| Winchester 231² | <<locked>> | 60% | 29,602 psi | 68% | 1306 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 17,767 psi | 41% | 1125 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 68 powders for .357 Mag. loaded with the .356 | 125gr | H&N KS F. ReloadSwiss RS 24 delivers the highest muzzle velocity at 1,601 fps; across all powders the maximum-charge window runs from 961 fps to 1,601 fps. ADI AP 100 gives the best case fill at 100 %, and 46 of the 68 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 29–90 %, 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, SNPE Vectan BA7 1/2, Vihtavuori N350 rank at the top here: for .357 Mag. with the .356 | 125gr | H&N KS F 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. ADI APS 350, ADI APS 450, ADI AS 30 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.