Load Specifications
Load data in caliber .357 Mag. with .356 | 125gr | SNS Coated Bullets RN 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, ADI AP 100 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% | 38,348 psi | 88% | 1463 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 36,941 psi | 85% | 1594 fps | 91% |
| Accurate Solo 1000² | <<locked>> | 76% | 37,043 psi | 85% | 1342 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 36,274 psi | 83% | 1394 fps | 100% |
| ADI AP 100 | <<locked>> | 96% | 35,781 psi | 82% | 1522 fps | 98.1% |
| ADI AP 70N² | <<locked>> | 68% | 38,522 psi | 89% | 1434 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 38,000 psi | 87% | 1240 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 37,246 psi | 86% | 1270 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 39,247 psi | 90% | 1332 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 36,738 psi | 84% | 1352 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 37,913 psi | 87% | 1401 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 38,551 psi | 89% | 1604 fps | 90.5% |
| Alliant BULLSEYE² | <<locked>> | 72% | 37,826 psi | 87% | 1493 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 36,230 psi | 83% | 1352 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 37,550 psi | 86% | 1483 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 37,072 psi | 85% | 1591 fps | 97.9% |
| Alliant RED DOT | <<locked>> | 80% | 38,174 psi | 88% | 1342 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 38,609 psi | 89% | 1506 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 36,521 psi | 84% | 1480 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 36,289 psi | 83% | 1335 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 37,492 psi | 86% | 1362 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 36,782 psi | 85% | 1362 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 76% | 36,840 psi | 85% | 1411 fps | 100% |
| Hodgdon Clays² | <<locked>> | 76% | 38,667 psi | 89% | 1263 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 34,301 psi | 79% | 1480 fps | 99.6% |
| Hodgdon Longshot² | <<locked>> | 64% | 38,014 psi | 87% | 1526 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 18,101 psi | 42% | 1017 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 35,940 psi | 83% | 1401 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 36,941 psi | 85% | 1594 fps | 91% |
| Lovex S011² | <<locked>> | 68% | 38,696 psi | 89% | 1394 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 36,376 psi | 84% | 1427 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 36,840 psi | 85% | 1394 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 38,043 psi | 87% | 1407 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 37,652 psi | 87% | 1381 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 36,724 psi | 84% | 1348 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 37,144 psi | 85% | 1299 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 38,827 psi | 89% | 1509 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 39,218 psi | 90% | 1539 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 36,230 psi | 83% | 1368 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 16,969 psi | 39% | 1027 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 38,914 psi | 89% | 1499 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 38,276 psi | 88% | 1601 fps | 93.9% |
| Rottweil P 801² | <<locked>> | 64% | 36,405 psi | 84% | 1335 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 38,783 psi | 89% | 1627 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 36,941 psi | 85% | 1594 fps | 91% |
| SNPE Vectan A0 | <<locked>> | 84% | 37,202 psi | 86% | 1440 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 37,927 psi | 87% | 1398 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 36,956 psi | 85% | 1407 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 38,145 psi | 88% | 1280 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 36,172 psi | 83% | 1490 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 36,216 psi | 83% | 1401 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 38,087 psi | 88% | 1611 fps | 99.2% |
| Somchem MP200² | <<locked>> | 76% | 38,508 psi | 89% | 1496 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 37,739 psi | 87% | 1460 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 35,897 psi | 83% | 1535 fps | 95.7% |
| Vihtavuori 3N37 | <<locked>> | 80% | 35,752 psi | 82% | 1506 fps | 100% |
| Vihtavuori 3N38* | <<locked>> | 92% | 34,983 psi | 80% | 1539 fps | 93.4% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 35,491 psi | 82% | 1611 fps | 97.3% |
| Vihtavuori N320² | <<locked>> | 72% | 35,737 psi | 82% | 1342 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 36,941 psi | 85% | 1270 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 37,811 psi | 87% | 1427 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 38,058 psi | 87% | 1467 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 36,303 psi | 83% | 1509 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 36,970 psi | 85% | 1391 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 35,955 psi | 83% | 1407 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% | 24,033 psi | 55% | 1247 fps | 99.8% |
| Accurate No. 7*² | <<locked>> | 68% | 28,210 psi | 65% | 1444 fps | 86.4% |
| Accurate Solo 1000² | <<locked>> | 60% | 24,816 psi | 57% | 1171 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 22,046 psi | 51% | 1178 fps | 100% |
| ADI AP 100*² | 7.2 gr | 64% | 16,389 psi | 38% | 1119 fps | 86.5% |
| ADI AP 70N² | <<locked>> | 60% | 31,212 psi | 72% | 1339 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 27,093 psi | 62% | 1099 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,657 psi | 59% | 1112 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 25,614 psi | 59% | 1148 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 26,919 psi | 62% | 1214 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 22,684 psi | 52% | 1181 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 88% | 28,718 psi | 66% | 1437 fps | 85.3% |
| Alliant BULLSEYE² | <<locked>> | 60% | 27,369 psi | 63% | 1332 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 25,179 psi | 58% | 1191 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 16,462 psi | 38% | 1096 fps | 98.8% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 21,089 psi | 48% | 1276 fps | 90% |
| Alliant RED DOT² | <<locked>> | 60% | 24,584 psi | 56% | 1152 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 30,501 psi | 70% | 1391 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 22,118 psi | 51% | 1234 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 24,453 psi | 56% | 1171 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 16,375 psi | 38% | 1033 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 26,078 psi | 60% | 1220 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 24,279 psi | 56% | 1227 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 27,543 psi | 63% | 1119 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 30,356 psi | 70% | 1417 fps | 98.9% |
| Hodgdon Longshot² | <<locked>> | 60% | 33,678 psi | 77% | 1463 fps | 99.9% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 9,195 psi | 21% | 771 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 26,121 psi | 60% | 1257 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 28,210 psi | 65% | 1444 fps | 86.4% |
| Lovex S011² | <<locked>> | 60% | 30,719 psi | 71% | 1293 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 25,382 psi | 58% | 1270 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 20,610 psi | 47% | 1145 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 22,945 psi | 53% | 1194 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 23,047 psi | 53% | 1168 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 24,671 psi | 57% | 1178 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,572 psi | 63% | 1171 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 29,994 psi | 69% | 1385 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 34,780 psi | 80% | 1476 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 29,776 psi | 68% | 1283 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 8,949 psi | 21% | 781 fps | 99.9% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 20,421 psi | 47% | 1211 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 68% | 24,250 psi | 56% | 1348 fps | 86.3% |
| Rottweil P 801² | <<locked>> | 60% | 33,127 psi | 76% | 1293 fps | 100% |
| Rottweil P 806*² | 9.8 gr | 60% | 16,085 psi | 37% | 1184 fps | 91.7% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 28,210 psi | 65% | 1444 fps | 86.4% |
| SNPE Vectan A0² | <<locked>> | 60% | 20,523 psi | 47% | 1168 fps | 99.9% |
| SNPE Vectan A1² | <<locked>> | 60% | 25,106 psi | 58% | 1217 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 24,265 psi | 56% | 1220 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,747 psi | 66% | 1158 fps | 100% |
| SNPE Vectan BA7 1/2*² | 7.2 gr | 60% | 17,767 psi | 41% | 1135 fps | 93.8% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 23,917 psi | 55% | 1217 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 23,163 psi | 53% | 1339 fps | 93.7% |
| Somchem MP200² | <<locked>> | 60% | 25,019 psi | 57% | 1286 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 22,843 psi | 53% | 1224 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 27,383 psi | 63% | 1388 fps | 91.8% |
| Vihtavuori 3N37² | <<locked>> | 60% | 20,349 psi | 47% | 1224 fps | 96.7% |
| Vihtavuori 3N38*² | <<locked>> | 76% | 22,800 psi | 52% | 1309 fps | 86.1% |
| Vihtavuori N105*² | <<locked>> | 76% | 17,999 psi | 41% | 1243 fps | 85.6% |
| Vihtavuori N320² | <<locked>> | 60% | 26,382 psi | 61% | 1211 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 16,418 psi | 38% | 965 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 24,265 psi | 56% | 1237 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 22,046 psi | 51% | 1217 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 18,318 psi | 42% | 1175 fps | 95.7% |
| Winchester 231² | <<locked>> | 60% | 32,866 psi | 76% | 1339 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 21,582 psi | 50% | 1181 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 15 powders for .357 Mag. loaded with the .356 | 125gr | SNS Coated Bullets RN. Rottweil P 806 delivers the highest muzzle velocity at 1,627 fps; across all powders the maximum-charge window runs from 1,017 fps to 1,627 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 15 of the 15 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 39–89 %, leaving at least 11 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N105 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, ADI AP 100, SNPE Vectan BA7 1/2 rank at the top here: for .357 Mag. with the .356 | 125gr | SNS Coated Bullets RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ReloadSwiss RS 24, Vihtavuori 3N38 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.