Load Specifications
Load data in caliber .357 Mag. with .357 | 158gr | Hornady FP XTP bullet and 67 powders. The key underlying parameters are shown in the table above.
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% | 35,128 psi | 81% | 1230 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 38,363 psi | 88% | 1424 fps | 94.8% |
| Accurate No. 9* | <<locked>> | 84% | 37,956 psi | 87% | 1407 fps | 89.2% |
| Accurate Solo 1000² | <<locked>> | 76% | 37,536 psi | 86% | 1161 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 37,826 psi | 87% | 1220 fps | 100% |
| Accurate TCM* | <<locked>> | 84% | 37,695 psi | 87% | 1401 fps | 90.4% |
| ADI AP 100 | <<locked>> | 96% | 37,391 psi | 86% | 1352 fps | 99.7% |
| ADI AP 70N² | <<locked>> | 68% | 38,638 psi | 89% | 1243 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 39,320 psi | 90% | 1083 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 38,203 psi | 88% | 1102 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 36,999 psi | 85% | 1129 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 36,869 psi | 85% | 1168 fps | 100% |
| Alliant BE-86² | <<locked>> | 76% | 35,665 psi | 82% | 1188 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 35,810 psi | 82% | 1378 fps | 92.7% |
| Alliant BULLSEYE² | <<locked>> | 72% | 38,566 psi | 89% | 1296 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 37,391 psi | 86% | 1178 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 38,624 psi | 89% | 1299 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 38,392 psi | 88% | 1411 fps | 99.6% |
| Alliant RED DOT | <<locked>> | 80% | 38,870 psi | 89% | 1165 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 35,853 psi | 82% | 1270 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 37,391 psi | 86% | 1289 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 37,188 psi | 85% | 1161 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 38,087 psi | 88% | 1184 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 37,376 psi | 86% | 1184 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 36,579 psi | 84% | 1083 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 35,244 psi | 81% | 1302 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 17,738 psi | 41% | 883 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 35,679 psi | 82% | 1211 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 38,363 psi | 88% | 1424 fps | 94.8% |
| Lovex D037.2* | <<locked>> | 84% | 38,827 psi | 89% | 1421 fps | 89.6% |
| Lovex S011² | <<locked>> | 64% | 35,781 psi | 82% | 1171 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 37,159 psi | 85% | 1243 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 37,536 psi | 86% | 1211 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 38,348 psi | 88% | 1220 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 38,783 psi | 89% | 1201 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 37,289 psi | 86% | 1168 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 38,014 psi | 87% | 1129 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 96% | 37,884 psi | 87% | 1444 fps | 87.5% |
| Ramshot Silhouette² | <<locked>> | 64% | 34,983 psi | 80% | 1263 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 36,622 psi | 84% | 1188 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 16,360 psi | 38% | 889 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 36,216 psi | 83% | 1270 fps | 100% |
| ReloadSwiss RS 24 | <<locked>> | 80% | 35,549 psi | 82% | 1371 fps | 95.7% |
| Rottweil P 801² | <<locked>> | 64% | 36,593 psi | 84% | 1158 fps | 100% |
| Rottweil P 806 | <<locked>> | 84% | 34,954 psi | 80% | 1381 fps | 100% |
| Shooters World Heavy Pistol* | <<locked>> | 84% | 38,827 psi | 89% | 1421 fps | 89.6% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 38,363 psi | 88% | 1424 fps | 94.8% |
| SNPE Vectan A0 | <<locked>> | 84% | 37,884 psi | 87% | 1253 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 39,189 psi | 90% | 1217 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 38,276 psi | 88% | 1227 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 38,189 psi | 88% | 1102 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 37,391 psi | 86% | 1309 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 37,695 psi | 87% | 1227 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 38,899 psi | 89% | 1417 fps | 100% |
| Somchem MP200² | <<locked>> | 72% | 35,549 psi | 82% | 1263 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 38,885 psi | 89% | 1273 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 36,709 psi | 84% | 1365 fps | 98.2% |
| Vihtavuori 3N37 | <<locked>> | 80% | 36,666 psi | 84% | 1319 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 96% | 37,971 psi | 87% | 1391 fps | 97.1% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 36,956 psi | 85% | 1427 fps | 99.4% |
| Vihtavuori N320² | <<locked>> | 72% | 37,695 psi | 87% | 1175 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 31,908 psi | 73% | 1047 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 37,101 psi | 85% | 1224 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 35,868 psi | 82% | 1243 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 35,621 psi | 82% | 1302 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 37,405 psi | 86% | 1207 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 36,477 psi | 84% | 1224 fps | 100% |
Start Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 24,671 psi | 57% | 1096 fps | 100% |
| Accurate No. 7*² | <<locked>> | 64% | 24,831 psi | 57% | 1217 fps | 87.9% |
| Accurate No. 9* | <<locked>> | 80% | 32,547 psi | 75% | 1335 fps | 86.6% |
| Accurate Solo 1000² | <<locked>> | 60% | 25,280 psi | 58% | 1017 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 21,886 psi | 50% | 1020 fps | 100% |
| Accurate TCM*² | <<locked>> | 76% | 28,921 psi | 66% | 1276 fps | 86% |
| ADI AP 100*² | <<locked>> | 60% | 14,344 psi | 33% | 935 fps | 87.8% |
| ADI AP 70N² | <<locked>> | 60% | 31,067 psi | 71% | 1158 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,934 psi | 62% | 945 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,860 psi | 59% | 961 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 25,469 psi | 59% | 991 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 27,412 psi | 63% | 1060 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 22,379 psi | 51% | 1024 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 80% | 23,496 psi | 54% | 1178 fps | 85.6% |
| Alliant BULLSEYE² | <<locked>> | 60% | 28,195 psi | 65% | 1168 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 24,555 psi | 56% | 1020 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 16,288 psi | 37% | 961 fps | 99.8% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 20,900 psi | 48% | 1122 fps | 93.3% |
| Alliant RED DOT² | <<locked>> | 60% | 24,236 psi | 56% | 991 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 31,227 psi | 72% | 1214 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 21,959 psi | 50% | 1076 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 24,308 psi | 56% | 1010 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 15,664 psi | 36% | 889 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 26,310 psi | 60% | 1063 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,538 psi | 50% | 899 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 31,343 psi | 72% | 1253 fps | 99.9% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,166 psi | 19% | 659 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 26,063 psi | 60% | 1093 fps | 100% |
| Lovex D037.1*² | <<locked>> | 64% | 24,831 psi | 57% | 1217 fps | 87.9% |
| Lovex D037.2* | <<locked>> | 80% | 34,011 psi | 78% | 1355 fps | 87.3% |
| Lovex S011² | <<locked>> | 60% | 31,792 psi | 73% | 1129 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 26,020 psi | 60% | 1112 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 20,262 psi | 47% | 988 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 22,481 psi | 52% | 1030 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 23,424 psi | 54% | 1017 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 25,121 psi | 58% | 1024 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,862 psi | 64% | 1017 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 92% | 33,112 psi | 76% | 1378 fps | 85.1% |
| Ramshot Silhouette² | <<locked>> | 60% | 30,835 psi | 71% | 1214 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 29,095 psi | 67% | 1102 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,498 psi | 17% | 653 fps | 99.9% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 20,146 psi | 46% | 1050 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 64% | 21,640 psi | 50% | 1138 fps | 88% |
| Rottweil P 801² | <<locked>> | 60% | 32,837 psi | 75% | 1115 fps | 100% |
| Rottweil P 806*² | <<locked>> | 60% | 15,447 psi | 36% | 1040 fps | 94.5% |
| Shooters World Heavy Pistol* | <<locked>> | 80% | 34,011 psi | 78% | 1355 fps | 87.3% |
| Shooters World Major Pistol*² | <<locked>> | 64% | 24,831 psi | 57% | 1217 fps | 87.9% |
| SNPE Vectan A0² | <<locked>> | 60% | 20,682 psi | 48% | 1020 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 25,092 psi | 58% | 1053 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 24,265 psi | 56% | 1056 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 29,414 psi | 68% | 1007 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 17,521 psi | 40% | 997 fps | 96.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 24,033 psi | 55% | 1056 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 23,380 psi | 54% | 1188 fps | 96.7% |
| Somchem MP200² | <<locked>> | 60% | 25,106 psi | 58% | 1122 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 23,018 psi | 53% | 1070 fps | 100% |
| Somchem S221² | <<locked>> | 60% | 27,456 psi | 63% | 1227 fps | 95% |
| Vihtavuori 3N37² | <<locked>> | 60% | 20,015 psi | 46% | 1070 fps | 98.6% |
| Vihtavuori 3N38*² | <<locked>> | 72% | 19,218 psi | 44% | 1083 fps | 86.9% |
| Vihtavuori N105*² | <<locked>> | 68% | 14,156 psi | 33% | 1004 fps | 85.1% |
| Vihtavuori N320² | <<locked>> | 60% | 26,731 psi | 61% | 1053 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 13,416 psi | 31% | 784 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 25,875 psi | 59% | 1096 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 22,510 psi | 52% | 1066 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 17,767 psi | 41% | 1020 fps | 97.8% |
| Winchester 231² | <<locked>> | 60% | 33,649 psi | 77% | 1168 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 21,118 psi | 49% | 1024 fps | 100% |
* 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 67 powders for .357 Mag. loaded with the .357 | 158gr | Hornady FP XTP. Ramshot Enforcer delivers the highest muzzle velocity at 1,444 fps; across all powders the maximum-charge window runs from 883 fps to 1,444 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 31 of the 67 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 38–90 %, leaving at least 10 % 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. As outliers, Accurate No. 7, Accurate No. 9, Accurate TCM burn incompletely and react more sensitively to barrel length and temperature. Accurate No. 2, Accurate Solo 1000, Accurate Solo 1250 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.