Load Specifications
Load data in caliber .357 Mag. with .357 | 125gr | Hornady XTP bullet and 63 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.
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Max Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 72% | 34,766 psi | 80% | 1447 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 37,072 psi | 85% | 1627 fps | 91.9% |
| Accurate Solo 1000² | <<locked>> | 76% | 36,898 psi | 85% | 1365 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 36,390 psi | 84% | 1421 fps | 100% |
| ADI AP 100 | <<locked>> | 96% | 35,868 psi | 82% | 1552 fps | 98.4% |
| ADI AP 70N² | <<locked>> | 68% | 38,014 psi | 87% | 1457 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 38,479 psi | 88% | 1273 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 37,376 psi | 86% | 1293 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 36,187 psi | 83% | 1325 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 36,187 psi | 83% | 1375 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 37,956 psi | 87% | 1427 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 38,798 psi | 89% | 1644 fps | 91.5% |
| Alliant BULLSEYE² | <<locked>> | 72% | 38,174 psi | 88% | 1526 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 39,131 psi | 90% | 1414 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 37,652 psi | 87% | 1516 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 37,318 psi | 86% | 1624 fps | 98.3% |
| Alliant RED DOT | <<locked>> | 80% | 37,840 psi | 87% | 1368 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 38,754 psi | 89% | 1532 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 36,753 psi | 84% | 1509 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 36,521 psi | 84% | 1365 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 37,304 psi | 86% | 1388 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 36,811 psi | 85% | 1388 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 39,160 psi | 90% | 1312 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 34,461 psi | 79% | 1512 fps | 99.8% |
| Hodgdon Longshot² | <<locked>> | 64% | 38,305 psi | 88% | 1558 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,969 psi | 39% | 1027 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 38,885 psi | 89% | 1470 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 37,072 psi | 85% | 1627 fps | 91.9% |
| Lovex S011² | <<locked>> | 68% | 39,175 psi | 90% | 1424 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 35,984 psi | 83% | 1453 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 36,680 psi | 84% | 1421 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 37,463 psi | 86% | 1430 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 37,913 psi | 87% | 1411 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 36,434 psi | 84% | 1371 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 37,173 psi | 85% | 1325 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 38,798 psi | 89% | 1535 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 35,766 psi | 82% | 1391 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 15,548 psi | 36% | 1030 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 39,175 psi | 90% | 1529 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 38,435 psi | 88% | 1634 fps | 94.6% |
| Rottweil P 801² | <<locked>> | 64% | 36,056 psi | 83% | 1362 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 38,711 psi | 89% | 1654 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 37,072 psi | 85% | 1627 fps | 91.9% |
| SNPE Vectan A0 | <<locked>> | 84% | 37,681 psi | 87% | 1473 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 38,450 psi | 88% | 1427 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 37,478 psi | 86% | 1437 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 38,232 psi | 88% | 1302 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 36,303 psi | 83% | 1516 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 36,056 psi | 83% | 1427 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 37,782 psi | 87% | 1637 fps | 99.4% |
| Somchem MP200² | <<locked>> | 76% | 38,551 psi | 89% | 1526 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 38,203 psi | 88% | 1493 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 35,650 psi | 82% | 1565 fps | 96.2% |
| Vihtavuori 3N37 | <<locked>> | 80% | 35,897 psi | 83% | 1532 fps | 100% |
| Vihtavuori 3N38* | <<locked>> | 96% | 37,260 psi | 86% | 1604 fps | 94.9% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 35,433 psi | 81% | 1637 fps | 97.7% |
| Vihtavuori N320² | <<locked>> | 72% | 36,550 psi | 84% | 1375 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 31,270 psi | 72% | 1234 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 35,389 psi | 81% | 1424 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 38,595 psi | 89% | 1499 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 38,464 psi | 88% | 1562 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 36,941 psi | 85% | 1421 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 35,708 psi | 82% | 1430 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% | 23,772 psi | 55% | 1270 fps | 99.9% |
| Accurate No. 7*² | <<locked>> | 68% | 27,818 psi | 64% | 1467 fps | 86.9% |
| Accurate Solo 1000² | <<locked>> | 60% | 24,453 psi | 56% | 1188 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 21,147 psi | 49% | 1191 fps | 100% |
| ADI AP 100*² | <<locked>> | 64% | 15,809 psi | 36% | 1132 fps | 86.4% |
| ADI AP 70N² | <<locked>> | 60% | 30,226 psi | 69% | 1355 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,469 psi | 61% | 1112 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,541 psi | 59% | 1135 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 24,323 psi | 56% | 1158 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 26,078 psi | 60% | 1230 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 21,901 psi | 50% | 1194 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 88% | 28,413 psi | 65% | 1463 fps | 86% |
| Alliant BULLSEYE² | <<locked>> | 60% | 27,238 psi | 63% | 1358 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 24,381 psi | 56% | 1207 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 15,519 psi | 36% | 1102 fps | 98.6% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 20,523 psi | 47% | 1289 fps | 90.1% |
| Alliant RED DOT² | <<locked>> | 60% | 23,351 psi | 54% | 1158 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 30,835 psi | 71% | 1421 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 21,350 psi | 49% | 1250 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 23,583 psi | 54% | 1184 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 15,200 psi | 35% | 1037 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 25,773 psi | 59% | 1243 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,089 psi | 48% | 1060 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 29,936 psi | 69% | 1440 fps | 99.1% |
| Hodgdon Longshot² | <<locked>> | 60% | 33,315 psi | 77% | 1486 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,006 psi | 18% | 771 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 25,440 psi | 58% | 1276 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 27,818 psi | 64% | 1467 fps | 86.9% |
| Lovex S011² | <<locked>> | 60% | 30,647 psi | 70% | 1319 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 24,627 psi | 57% | 1286 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,696 psi | 45% | 1155 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 21,538 psi | 50% | 1198 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,960 psi | 53% | 1194 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 24,801 psi | 57% | 1207 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,122 psi | 62% | 1191 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 30,182 psi | 69% | 1414 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 28,747 psi | 66% | 1299 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,324 psi | 17% | 761 fps | 99.1% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 19,856 psi | 46% | 1227 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 68% | 23,540 psi | 54% | 1362 fps | 86.4% |
| Rottweil P 801² | <<locked>> | 60% | 32,082 psi | 74% | 1312 fps | 100% |
| Rottweil P 806*² | 10.5 gr | 60% | 14,446 psi | 33% | 1165 fps | 90% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 27,818 psi | 64% | 1467 fps | 86.9% |
| SNPE Vectan A0² | <<locked>> | 60% | 20,146 psi | 46% | 1188 fps | 99.9% |
| SNPE Vectan A1² | <<locked>> | 60% | 24,700 psi | 57% | 1234 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 23,844 psi | 55% | 1240 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,471 psi | 65% | 1178 fps | 100% |
| SNPE Vectan BA7 1/2*² | 7.7 gr | 60% | 16,824 psi | 39% | 1138 fps | 93.4% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 23,453 psi | 54% | 1237 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 22,031 psi | 51% | 1345 fps | 93.5% |
| Somchem MP200² | <<locked>> | 60% | 24,758 psi | 57% | 1312 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 22,365 psi | 51% | 1243 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 26,861 psi | 62% | 1411 fps | 92.2% |
| Vihtavuori 3N37² | <<locked>> | 60% | 19,261 psi | 44% | 1227 fps | 96.4% |
| Vihtavuori 3N38*² | <<locked>> | 76% | 21,118 psi | 49% | 1299 fps | 85.4% |
| Vihtavuori N105*² | <<locked>> | 76% | 17,056 psi | 39% | 1247 fps | 85.2% |
| Vihtavuori N320² | <<locked>> | 60% | 25,904 psi | 60% | 1230 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 13,155 psi | 30% | 922 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 24,743 psi | 57% | 1273 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 21,582 psi | 50% | 1237 fps | 100% |
| Vihtavuori N350² | 7.6 gr | 60% | 17,027 psi | 39% | 1171 fps | 95.2% |
| Winchester 231² | <<locked>> | 60% | 32,953 psi | 76% | 1368 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 20,610 psi | 47% | 1194 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 63 powders for .357 Mag. loaded with the .357 | 125gr | Hornady XTP. Rottweil P 806 delivers the highest muzzle velocity at 1,654 fps; across all powders the maximum-charge window runs from 1,027 fps to 1,654 fps. Alliant BLUE DOT gives the best case fill at 100 %, and 29 of the 63 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 36–90 %, leaving at least 10 % headroom. Alliant BLUE DOT, Hodgdon TrailBoss, ReloadSwiss RS 14 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 .357 | 125gr | Hornady XTP 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, Alliant Herco, Baschieri & Pellagri 102 Pistol 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.