Load Specifications
Load data in caliber .357 Mag. with .357 | 158gr | H&N HP HS bullet and 67 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 N105 and ADI AP 100.
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% | 35,288 psi | 81% | 1243 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 37,130 psi | 85% | 1421 fps | 94.6% |
| Accurate No. 9* | <<locked>> | 84% | 36,709 psi | 84% | 1406 fps | 88.9% |
| Accurate Solo 1000² | <<locked>> | 76% | 36,912 psi | 85% | 1164 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 36,825 psi | 85% | 1220 fps | 100% |
| Accurate TCM* | <<locked>> | 84% | 36,506 psi | 84% | 1398 fps | 90.2% |
| ADI AP 100 | <<locked>> | 96% | 36,027 psi | 83% | 1347 fps | 99.6% |
| ADI AP 70N² | <<locked>> | 68% | 38,087 psi | 88% | 1251 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 39,015 psi | 90% | 1086 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 36,767 psi | 85% | 1096 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 39,247 psi | 90% | 1162 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 38,841 psi | 89% | 1202 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 38,058 psi | 87% | 1222 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 34,751 psi | 80% | 1379 fps | 92.6% |
| Alliant BULLSEYE² | <<locked>> | 72% | 38,754 psi | 89% | 1309 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 37,623 psi | 86% | 1184 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 36,941 psi | 85% | 1295 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 36,999 psi | 85% | 1404 fps | 99.5% |
| Alliant RED DOT | <<locked>> | 80% | 37,855 psi | 87% | 1167 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 38,928 psi | 89% | 1316 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 35,911 psi | 83% | 1288 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 36,216 psi | 83% | 1162 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 37,666 psi | 87% | 1191 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 36,767 psi | 85% | 1190 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 39,131 psi | 90% | 1119 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 34,722 psi | 80% | 1308 fps | 100% |
| Hodgdon Longshot² | <<locked>> | 64% | 38,870 psi | 89% | 1349 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,969 psi | 39% | 878 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 38,087 psi | 88% | 1251 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 37,130 psi | 85% | 1421 fps | 94.6% |
| Lovex D037.2* | <<locked>> | 84% | 37,521 psi | 86% | 1415 fps | 89.3% |
| Lovex S011² | <<locked>> | 68% | 39,305 psi | 90% | 1216 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 35,824 psi | 82% | 1241 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 37,449 psi | 86% | 1222 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 36,767 psi | 85% | 1217 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 37,840 psi | 87% | 1203 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 36,492 psi | 84% | 1169 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 37,318 psi | 86% | 1130 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 39,204 psi | 90% | 1321 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 39,059 psi | 90% | 1226 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 15,214 psi | 35% | 881 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 34,983 psi | 80% | 1267 fps | 100% |
| ReloadSwiss RS 24 | <<locked>> | 84% | 38,914 psi | 89% | 1429 fps | 96.9% |
| Rottweil P 801² | <<locked>> | 64% | 35,070 psi | 81% | 1155 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 37,855 psi | 87% | 1428 fps | 100% |
| Shooters World Heavy Pistol* | <<locked>> | 84% | 37,521 psi | 86% | 1415 fps | 89.3% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 37,130 psi | 85% | 1421 fps | 94.6% |
| SNPE Vectan A0 | <<locked>> | 84% | 37,840 psi | 87% | 1262 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 38,276 psi | 88% | 1217 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 37,362 psi | 86% | 1227 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 37,768 psi | 87% | 1106 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 36,840 psi | 85% | 1315 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 36,579 psi | 84% | 1226 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 37,826 psi | 87% | 1419 fps | 100% |
| Somchem MP200² | <<locked>> | 76% | 38,885 psi | 89% | 1310 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 37,681 psi | 87% | 1273 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 34,722 psi | 80% | 1352 fps | 97.8% |
| Vihtavuori 3N37 | <<locked>> | 80% | 36,056 psi | 83% | 1326 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 92% | 35,926 psi | 83% | 1378 fps | 96.7% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 36,318 psi | 83% | 1427 fps | 99.3% |
| Vihtavuori N320² | <<locked>> | 72% | 35,027 psi | 81% | 1160 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 36,782 psi | 85% | 1106 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 37,463 psi | 86% | 1239 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 38,348 psi | 88% | 1281 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 36,854 psi | 85% | 1327 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 37,405 psi | 86% | 1217 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 36,013 psi | 83% | 1230 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% | 23,873 psi | 55% | 1096 fps | 100% |
| Accurate No. 7*² | <<locked>> | 64% | 23,743 psi | 55% | 1211 fps | 87.4% |
| Accurate No. 9* | <<locked>> | 80% | 31,357 psi | 72% | 1330 fps | 86.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 24,743 psi | 57% | 1020 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 20,987 psi | 48% | 1020 fps | 100% |
| Accurate TCM*² | <<locked>> | 76% | 27,847 psi | 64% | 1270 fps | 85.5% |
| ADI AP 100*² | 6.2 gr | 60% | 13,314 psi | 31% | 922 fps | 86.5% |
| ADI AP 70N² | <<locked>> | 60% | 29,646 psi | 68% | 1154 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,658 psi | 61% | 951 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,527 psi | 59% | 968 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 23,757 psi | 55% | 982 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 25,527 psi | 59% | 1047 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 21,234 psi | 49% | 1018 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 84% | 25,309 psi | 58% | 1227 fps | 87.2% |
| Alliant BULLSEYE² | <<locked>> | 60% | 27,441 psi | 63% | 1168 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 24,918 psi | 57% | 1030 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 14,518 psi | 33% | 939 fps | 99.4% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 19,740 psi | 45% | 1110 fps | 92.5% |
| Alliant RED DOT² | <<locked>> | 60% | 23,322 psi | 54% | 993 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 31,299 psi | 72% | 1225 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 20,682 psi | 48% | 1070 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 23,438 psi | 54% | 1012 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,533 psi | 33% | 883 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 25,034 psi | 58% | 1059 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,118 psi | 49% | 906 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 30,037 psi | 69% | 1247 fps | 99.9% |
| Hodgdon Longshot² | <<locked>> | 60% | 32,909 psi | 76% | 1280 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,715 psi | 15% | 636 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 24,700 psi | 57% | 1087 fps | 100% |
| Lovex D037.1*² | <<locked>> | 64% | 23,743 psi | 55% | 1211 fps | 87.4% |
| Lovex D037.2* | <<locked>> | 80% | 32,808 psi | 75% | 1352 fps | 87% |
| Lovex S011² | <<locked>> | 60% | 31,140 psi | 72% | 1130 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 24,787 psi | 57% | 1108 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,348 psi | 44% | 987 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 21,074 psi | 48% | 1024 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,626 psi | 52% | 1019 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 24,381 psi | 56% | 1025 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,267 psi | 63% | 1019 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 29,733 psi | 68% | 1211 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 27,499 psi | 63% | 1099 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 6,193 psi | 14% | 634 fps | 99.1% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 19,116 psi | 44% | 1045 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 64% | 20,291 psi | 47% | 1124 fps | 87.1% |
| Rottweil P 801² | <<locked>> | 60% | 31,285 psi | 72% | 1114 fps | 100% |
| Rottweil P 806*² | 9 gr | 60% | 13,416 psi | 31% | 1004 fps | 92.3% |
| Shooters World Heavy Pistol* | <<locked>> | 80% | 32,808 psi | 75% | 1352 fps | 87% |
| Shooters World Major Pistol*² | <<locked>> | 64% | 23,743 psi | 55% | 1211 fps | 87.4% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,856 psi | 46% | 1018 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 24,279 psi | 56% | 1053 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 23,482 psi | 54% | 1056 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,152 psi | 65% | 1000 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 16,447 psi | 38% | 986 fps | 95.7% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 23,047 psi | 53% | 1057 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 21,698 psi | 50% | 1169 fps | 95.9% |
| Somchem MP200² | <<locked>> | 60% | 23,946 psi | 55% | 1119 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 22,002 psi | 51% | 1066 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 26,310 psi | 60% | 1223 fps | 94.6% |
| Vihtavuori 3N37² | <<locked>> | 60% | 18,695 psi | 43% | 1059 fps | 98.1% |
| Vihtavuori 3N38*² | <<locked>> | 72% | 19,247 psi | 44% | 1099 fps | 87.2% |
| Vihtavuori N105*² | 8.5 gr | 72% | 14,765 psi | 34% | 1039 fps | 86.4% |
| Vihtavuori N320² | <<locked>> | 60% | 25,266 psi | 58% | 1046 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 14,286 psi | 33% | 821 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 23,525 psi | 54% | 1075 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 21,176 psi | 49% | 1060 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 17,550 psi | 40% | 1032 fps | 97.7% |
| Winchester 231² | <<locked>> | 60% | 32,634 psi | 75% | 1166 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 19,914 psi | 46% | 1017 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 67 powders for .357 Mag. loaded with the .357 | 158gr | H&N HP HS. ReloadSwiss RS 24 delivers the highest muzzle velocity at 1,429 fps; across all powders the maximum-charge window runs from 878 fps to 1,429 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 33 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 35–90 %, 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. Rottweil P 806, Vihtavuori N105, ADI AP 100 rank at the top here: for .357 Mag. with the .357 | 158gr | H&N HP HS they combine a high case fill with complete burn and sit in the upper velocity band. 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.