Load Specifications
Load data in caliber .357 Mag. with .356 | 125gr | H&N RN HS 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, 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.
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Max Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 76% | 35,737 psi | 82% | 1447 fps | 100% |
| Accurate No. 5² | <<locked>> | 64% | 38,029 psi | 87% | 1575 fps | 99.4% |
| Accurate No. 7* | <<locked>> | 80% | 37,913 psi | 87% | 1627 fps | 91.6% |
| Accurate Solo 1000 | <<locked>> | 80% | 38,551 psi | 89% | 1375 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 37,057 psi | 85% | 1424 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 36,405 psi | 84% | 1552 fps | 98.3% |
| ADI AP 70N² | <<locked>> | 72% | 38,957 psi | 90% | 1467 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 36,318 psi | 83% | 1234 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 38,377 psi | 88% | 1293 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 37,231 psi | 86% | 1332 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 36,201 psi | 83% | 1368 fps | 100% |
| Alliant BE-86 | <<locked>> | 84% | 38,856 psi | 89% | 1430 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 34,708 psi | 80% | 1568 fps | 89% |
| Alliant BULLSEYE² | <<locked>> | 76% | 38,943 psi | 90% | 1522 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 38,087 psi | 88% | 1385 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 37,449 psi | 86% | 1506 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 84% | 37,594 psi | 86% | 1617 fps | 98.1% |
| Alliant RED DOT | <<locked>> | 84% | 37,884 psi | 87% | 1362 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 36,042 psi | 83% | 1490 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 36,970 psi | 85% | 1509 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 37,086 psi | 85% | 1365 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 37,449 psi | 86% | 1381 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 37,956 psi | 87% | 1394 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 37,492 psi | 86% | 1283 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 36,187 psi | 83% | 1526 fps | 99.8% |
| Hodgdon Longshot² | <<locked>> | 64% | 34,751 psi | 80% | 1503 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 14,750 psi | 34% | 988 fps | 100% |
| Hodgdon Universal | <<locked>> | 80% | 38,957 psi | 90% | 1467 fps | 100% |
| Lovex D036² | <<locked>> | 64% | 37,985 psi | 87% | 1575 fps | 99.4% |
| Lovex D037.1* | <<locked>> | 80% | 37,913 psi | 87% | 1627 fps | 91.6% |
| Lovex S011² | <<locked>> | 68% | 36,361 psi | 84% | 1381 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 36,448 psi | 84% | 1450 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 37,260 psi | 86% | 1421 fps | 100% |
| Maxam CSB 2 | <<locked>> | 84% | 37,391 psi | 86% | 1427 fps | 100% |
| Maxam CSB 3 | <<locked>> | 84% | 38,522 psi | 89% | 1411 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 37,811 psi | 87% | 1378 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 38,566 psi | 89% | 1332 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 35,810 psi | 82% | 1490 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 36,056 psi | 83% | 1512 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 36,143 psi | 83% | 1398 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 13,082 psi | 30% | 984 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 35,578 psi | 82% | 1480 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 88% | 39,320 psi | 90% | 1634 fps | 94.4% |
| Rottweil P 801² | <<locked>> | 68% | 36,593 psi | 84% | 1365 fps | 100% |
| Rottweil P 806 | <<locked>> | 92% | 37,275 psi | 86% | 1631 fps | 100% |
| Shooters World Auto Pistol² | <<locked>> | 64% | 37,985 psi | 87% | 1575 fps | 99.4% |
| Shooters World Major Pistol* | <<locked>> | 80% | 37,913 psi | 87% | 1627 fps | 91.6% |
| SNPE Vectan A0 | <<locked>> | 88% | 37,869 psi | 87% | 1467 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 35,433 psi | 81% | 1385 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 80% | 38,638 psi | 89% | 1440 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 36,492 psi | 84% | 1273 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 36,767 psi | 85% | 1516 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 37,405 psi | 86% | 1437 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 80% | 38,363 psi | 88% | 1637 fps | 99.3% |
| Somchem MP200 | <<locked>> | 80% | 39,334 psi | 90% | 1526 fps | 100% |
| Somchem MS200 | <<locked>> | 84% | 38,914 psi | 89% | 1493 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 36,405 psi | 84% | 1572 fps | 96% |
| Vihtavuori 3N37 | <<locked>> | 84% | 36,898 psi | 85% | 1539 fps | 100% |
| Vihtavuori 3N38*ᴾ | <<locked>> | 100% | 37,231 psi | 86% | 1594 fps | 94.4% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 31,154 psi | 72% | 1562 fps | 95.8% |
| Vihtavuori N310² | <<locked>> | 64% | 39,334 psi | 90% | 1306 fps | 100% |
| Vihtavuori N320² | <<locked>> | 76% | 36,782 psi | 85% | 1371 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 28,776 psi | 66% | 1201 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 36,608 psi | 84% | 1434 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 34,983 psi | 80% | 1447 fps | 100% |
| Vihtavuori N350 | <<locked>> | 92% | 38,986 psi | 90% | 1558 fps | 100% |
| Winchester 231² | <<locked>> | 68% | 38,493 psi | 88% | 1427 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 36,347 psi | 84% | 1434 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% | 21,480 psi | 49% | 1220 fps | 99.4% |
| Accurate No. 5² | <<locked>> | 60% | 32,663 psi | 75% | 1496 fps | 98.4% |
| Accurate No. 7*² | <<locked>> | 72% | 28,166 psi | 65% | 1467 fps | 86.5% |
| Accurate Solo 1000² | <<locked>> | 60% | 22,640 psi | 52% | 1155 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 19,189 psi | 44% | 1152 fps | 100% |
| ADI AP 100*² | <<locked>> | 68% | 15,563 psi | 36% | 1125 fps | 85.5% |
| ADI AP 70N² | <<locked>> | 60% | 27,282 psi | 63% | 1309 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 25,396 psi | 58% | 1093 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 23,931 psi | 55% | 1102 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 22,684 psi | 52% | 1129 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 23,801 psi | 55% | 1194 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 19,551 psi | 45% | 1152 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 92% | 28,282 psi | 65% | 1453 fps | 85.2% |
| Alliant BULLSEYE² | <<locked>> | 60% | 24,874 psi | 57% | 1309 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 23,496 psi | 54% | 1178 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 13,460 psi | 31% | 1050 fps | 96.9% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 17,985 psi | 41% | 1220 fps | 87% |
| Alliant RED DOT² | <<locked>> | 60% | 21,538 psi | 50% | 1129 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 28,703 psi | 66% | 1381 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 18,565 psi | 43% | 1191 fps | 99.5% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 21,596 psi | 50% | 1152 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 13,198 psi | 30% | 994 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 22,829 psi | 52% | 1198 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 19,943 psi | 46% | 1037 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 27,180 psi | 62% | 1385 fps | 98.1% |
| Hodgdon Longshot² | <<locked>> | 60% | 30,429 psi | 70% | 1437 fps | 99.7% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,121 psi | 14% | 715 fps | 99.5% |
| Hodgdon Universal² | <<locked>> | 60% | 22,350 psi | 51% | 1224 fps | 100% |
| Lovex D036² | <<locked>> | 60% | 32,619 psi | 75% | 1493 fps | 98.4% |
| Lovex D037.1*² | <<locked>> | 72% | 28,166 psi | 65% | 1467 fps | 86.5% |
| Lovex S011² | <<locked>> | 60% | 29,254 psi | 67% | 1289 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 21,930 psi | 50% | 1237 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 17,724 psi | 41% | 1115 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 18,869 psi | 43% | 1155 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 20,972 psi | 48% | 1158 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 22,060 psi | 51% | 1158 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 25,019 psi | 57% | 1158 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 27,035 psi | 62% | 1358 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 31,618 psi | 73% | 1450 fps | 99.8% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 25,324 psi | 58% | 1250 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 5,598 psi | 13% | 702 fps | 95.8% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 17,332 psi | 40% | 1171 fps | 99.9% |
| ReloadSwiss RS 24*² | <<locked>> | 72% | 24,033 psi | 55% | 1368 fps | 86.2% |
| Rottweil P 801² | <<locked>> | 60% | 28,964 psi | 67% | 1270 fps | 100% |
| Rottweil P 806*² | 10.5 gr | 64% | 13,518 psi | 31% | 1145 fps | 88.3% |
| Shooters World Auto Pistol² | <<locked>> | 60% | 32,619 psi | 75% | 1493 fps | 98.4% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 28,166 psi | 65% | 1467 fps | 86.5% |
| SNPE Vectan A0² | <<locked>> | 60% | 17,985 psi | 41% | 1135 fps | 99.3% |
| SNPE Vectan A1² | <<locked>> | 60% | 22,640 psi | 52% | 1198 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 21,828 psi | 50% | 1198 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 27,021 psi | 62% | 1152 fps | 100% |
| SNPE Vectan BA7 1/2*² | 7.2 gr | 60% | 14,895 psi | 34% | 1086 fps | 90.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 20,914 psi | 48% | 1191 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 18,971 psi | 44% | 1273 fps | 90.5% |
| Somchem MP200² | <<locked>> | 60% | 21,785 psi | 50% | 1250 fps | 99.8% |
| Somchem MS200² | <<locked>> | 60% | 19,885 psi | 46% | 1191 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 23,366 psi | 54% | 1335 fps | 89.3% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 17,114 psi | 39% | 1175 fps | 94.4% |
| Vihtavuori 3N38* | <<locked>> | 84% | 23,308 psi | 54% | 1348 fps | 86.7% |
| Vihtavuori N105* | <<locked>> | 84% | 19,029 psi | 44% | 1306 fps | 87.1% |
| Vihtavuori N310² | <<locked>> | 60% | 35,128 psi | 81% | 1260 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 23,612 psi | 54% | 1194 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 11,095 psi | 26% | 886 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 21,944 psi | 50% | 1224 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 19,116 psi | 44% | 1181 fps | 99.8% |
| Vihtavuori N350*² | 7 gr | 60% | 14,460 psi | 33% | 1099 fps | 92.2% |
| Winchester 231² | <<locked>> | 60% | 30,023 psi | 69% | 1322 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 18,246 psi | 42% | 1145 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 RN HS. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,637 fps; across all powders the maximum-charge window runs from 984 fps to 1,637 fps. ADI AP 100 gives the best case fill at 100 %, and 42 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 30–90 %, 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 | 125gr | H&N RN HS 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, Alliant Herco 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.