Load Specifications
Load data in caliber .357 Mag. with .357 | 135gr | Speer HPSB GD bullet and 64 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N105, 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>> | 72% | 36,216 psi | 83% | 1398 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 39,088 psi | 90% | 1594 fps | 93.9% |
| Accurate No. 9* | <<locked>> | 84% | 38,087 psi | 88% | 1568 fps | 87.8% |
| Accurate Solo 1000² | <<locked>> | 76% | 37,971 psi | 87% | 1316 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 37,855 psi | 87% | 1375 fps | 100% |
| Accurate TCM* | <<locked>> | 84% | 38,232 psi | 88% | 1565 fps | 89.3% |
| ADI AP 100 | <<locked>> | 96% | 37,855 psi | 87% | 1519 fps | 99.3% |
| ADI AP 70N² | <<locked>> | 64% | 35,288 psi | 81% | 1358 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 39,131 psi | 90% | 1220 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 38,145 psi | 88% | 1243 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 37,115 psi | 85% | 1273 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 37,318 psi | 86% | 1325 fps | 100% |
| Alliant BE-86² | <<locked>> | 76% | 35,578 psi | 82% | 1335 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 36,434 psi | 84% | 1542 fps | 91.7% |
| Alliant BULLSEYE² | <<locked>> | 68% | 35,259 psi | 81% | 1417 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 36,782 psi | 85% | 1322 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 38,696 psi | 89% | 1460 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 38,609 psi | 89% | 1578 fps | 99.2% |
| Alliant RED DOT | <<locked>> | 80% | 38,841 psi | 89% | 1316 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 35,984 psi | 83% | 1430 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 37,579 psi | 86% | 1453 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 37,768 psi | 87% | 1319 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 38,972 psi | 90% | 1342 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 37,782 psi | 87% | 1335 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 37,391 psi | 86% | 1234 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 36,303 psi | 83% | 1473 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 17,521 psi | 40% | 991 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 36,114 psi | 83% | 1368 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 39,088 psi | 90% | 1594 fps | 93.9% |
| Lovex S011² | <<locked>> | 64% | 35,897 psi | 83% | 1322 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 37,623 psi | 86% | 1407 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 38,130 psi | 88% | 1371 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 38,218 psi | 88% | 1371 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 39,204 psi | 90% | 1362 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 37,565 psi | 86% | 1319 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 38,130 psi | 88% | 1276 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 64% | 35,186 psi | 81% | 1424 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 37,231 psi | 86% | 1345 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 16,099 psi | 37% | 994 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 36,825 psi | 85% | 1434 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 80% | 35,810 psi | 82% | 1532 fps | 94.7% |
| Rottweil P 801² | <<locked>> | 64% | 37,362 psi | 86% | 1312 fps | 100% |
| Rottweil P 806 | <<locked>> | 84% | 35,491 psi | 82% | 1542 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 39,088 psi | 90% | 1594 fps | 93.9% |
| SNPE Vectan A0 | <<locked>> | 84% | 38,464 psi | 88% | 1414 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 39,073 psi | 90% | 1371 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 38,145 psi | 88% | 1381 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 39,030 psi | 90% | 1253 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 38,189 psi | 88% | 1476 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 37,449 psi | 86% | 1378 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 72% | 34,780 psi | 80% | 1522 fps | 99.3% |
| Somchem MP200² | <<locked>> | 72% | 36,230 psi | 83% | 1427 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 38,914 psi | 89% | 1434 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 37,101 psi | 85% | 1526 fps | 97.5% |
| Vihtavuori 3N37 | <<locked>> | 80% | 37,144 psi | 85% | 1486 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 96% | 39,044 psi | 90% | 1565 fps | 96.5% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 37,710 psi | 87% | 1601 fps | 98.9% |
| Vihtavuori N320² | <<locked>> | 72% | 37,884 psi | 87% | 1329 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 32,401 psi | 74% | 1188 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 36,999 psi | 85% | 1375 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 36,013 psi | 83% | 1401 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 35,723 psi | 82% | 1460 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 38,290 psi | 88% | 1368 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 37,304 psi | 86% | 1385 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% | 24,685 psi | 57% | 1234 fps | 100% |
| Accurate No. 7*² | <<locked>> | 64% | 24,932 psi | 57% | 1352 fps | 86.3% |
| Accurate No. 9* | <<locked>> | 80% | 33,417 psi | 77% | 1496 fps | 85.5% |
| Accurate Solo 1000² | <<locked>> | 60% | 25,788 psi | 59% | 1155 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 21,901 psi | 50% | 1148 fps | 100% |
| Accurate TCM* | <<locked>> | 80% | 33,547 psi | 77% | 1496 fps | 87.1% |
| ADI AP 100*² | 7.2 gr | 60% | 14,605 psi | 34% | 1050 fps | 86.3% |
| ADI AP 70N² | <<locked>> | 60% | 31,386 psi | 72% | 1306 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 27,572 psi | 63% | 1079 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,976 psi | 60% | 1089 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 25,614 psi | 59% | 1122 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 27,572 psi | 63% | 1198 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 22,785 psi | 52% | 1155 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 84% | 26,440 psi | 61% | 1368 fps | 86.1% |
| Alliant BULLSEYE² | <<locked>> | 60% | 28,210 psi | 65% | 1312 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 25,048 psi | 58% | 1161 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 16,099 psi | 37% | 1070 fps | 99.4% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 21,002 psi | 48% | 1250 fps | 91.8% |
| Alliant RED DOT² | <<locked>> | 60% | 24,613 psi | 57% | 1125 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 32,010 psi | 74% | 1375 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 22,176 psi | 51% | 1211 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 24,337 psi | 56% | 1142 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 15,766 psi | 36% | 1001 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 26,353 psi | 61% | 1194 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 22,089 psi | 51% | 1027 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 31,502 psi | 72% | 1404 fps | 99.7% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,137 psi | 19% | 741 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 26,339 psi | 61% | 1230 fps | 100% |
| Lovex D037.1*² | <<locked>> | 64% | 24,932 psi | 57% | 1352 fps | 86.3% |
| Lovex S011² | <<locked>> | 60% | 31,633 psi | 73% | 1270 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 25,686 psi | 59% | 1243 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 20,958 psi | 48% | 1125 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 22,394 psi | 51% | 1155 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 23,685 psi | 54% | 1152 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 25,498 psi | 59% | 1161 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,731 psi | 64% | 1145 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 30,908 psi | 71% | 1362 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 29,907 psi | 69% | 1253 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,760 psi | 18% | 745 fps | 99.8% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 20,798 psi | 48% | 1191 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 64% | 21,509 psi | 49% | 1263 fps | 86.1% |
| Rottweil P 801² | <<locked>> | 60% | 33,243 psi | 76% | 1263 fps | 100% |
| Rottweil P 806*² | <<locked>> | 60% | 15,592 psi | 36% | 1152 fps | 92.8% |
| Shooters World Major Pistol*² | <<locked>> | 64% | 24,932 psi | 57% | 1352 fps | 86.3% |
| SNPE Vectan A0² | <<locked>> | 60% | 20,871 psi | 48% | 1148 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 25,498 psi | 59% | 1194 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 24,700 psi | 57% | 1198 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 29,008 psi | 67% | 1132 fps | 100% |
| SNPE Vectan BA7 1/2² | 7.6 gr | 60% | 17,564 psi | 40% | 1112 fps | 95.2% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 24,265 psi | 56% | 1194 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 23,351 psi | 54% | 1319 fps | 95.4% |
| Somchem MP200² | <<locked>> | 60% | 25,164 psi | 58% | 1260 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 23,177 psi | 53% | 1204 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 27,804 psi | 64% | 1371 fps | 93.9% |
| Vihtavuori 3N37² | <<locked>> | 60% | 20,247 psi | 47% | 1198 fps | 97.8% |
| Vihtavuori 3N38*² | <<locked>> | 72% | 19,682 psi | 45% | 1214 fps | 85.5% |
| Vihtavuori N105*² | 9.8 gr | 72% | 16,259 psi | 37% | 1175 fps | 85.9% |
| Vihtavuori N320² | <<locked>> | 60% | 26,731 psi | 61% | 1188 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 13,503 psi | 31% | 886 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 25,802 psi | 59% | 1230 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 22,466 psi | 52% | 1198 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 17,898 psi | 41% | 1142 fps | 96.8% |
| Winchester 231² | <<locked>> | 60% | 34,185 psi | 79% | 1319 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 21,408 psi | 49% | 1155 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 64 powders for .357 Mag. loaded with the .357 | 135gr | Speer HPSB GD. Vihtavuori N105 delivers the highest muzzle velocity at 1,601 fps; across all powders the maximum-charge window runs from 991 fps to 1,601 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 28 of the 64 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 37–90 %, 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. Vihtavuori N105, ADI AP 100, SNPE Vectan BA7 1/2 rank at the top here: for .357 Mag. with the .357 | 135gr | Speer HPSB GD 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. ADI AP 100, ADI APS 350, ADI APS 450 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.