Load Specifications
Load data in caliber .357 Mag. with .355 | 130gr | Speer TMJ bullet and 69 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 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>> | 76% | 37,318 psi | 86% | 1414 fps | 100% |
| Accurate No. 5² | <<locked>> | 64% | 38,841 psi | 89% | 1535 fps | 99.6% |
| Accurate No. 7*² | <<locked>> | 76% | 34,098 psi | 78% | 1519 fps | 90.1% |
| Accurate Solo 1000 | <<locked>> | 80% | 38,580 psi | 89% | 1329 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 38,696 psi | 89% | 1391 fps | 100% |
| Accurate TCM* | <<locked>> | 88% | 38,551 psi | 89% | 1565 fps | 87.4% |
| ADI AP 100ᴾ | <<locked>> | 100% | 37,420 psi | 86% | 1516 fps | 98.6% |
| ADI AP 70N² | <<locked>> | 68% | 36,521 psi | 84% | 1385 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 37,521 psi | 86% | 1204 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 38,928 psi | 89% | 1253 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 38,435 psi | 88% | 1296 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 37,710 psi | 87% | 1335 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 35,766 psi | 82% | 1345 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 35,911 psi | 83% | 1535 fps | 89.7% |
| Alliant BULLSEYE² | <<locked>> | 72% | 36,579 psi | 84% | 1444 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 38,087 psi | 88% | 1345 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 38,595 psi | 89% | 1470 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 84% | 38,595 psi | 89% | 1581 fps | 98.4% |
| Alliant RED DOT | <<locked>> | 84% | 39,160 psi | 90% | 1325 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 37,478 psi | 86% | 1457 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 38,334 psi | 88% | 1473 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 38,566 psi | 89% | 1332 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 38,943 psi | 90% | 1348 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 38,943 psi | 90% | 1358 fps | 100% |
| Hodgdon CFE Pistol | <<locked>> | 80% | 38,812 psi | 89% | 1404 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 38,189 psi | 88% | 1247 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 37,188 psi | 85% | 1490 fps | 99.9% |
| Hodgdon Longshot² | <<locked>> | 64% | 36,419 psi | 84% | 1473 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,389 psi | 38% | 974 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 36,521 psi | 84% | 1385 fps | 100% |
| Lovex D036² | <<locked>> | 64% | 38,783 psi | 89% | 1535 fps | 99.6% |
| Lovex D037.1*² | <<locked>> | 76% | 34,098 psi | 78% | 1519 fps | 90.1% |
| Lovex S011² | <<locked>> | 68% | 37,434 psi | 86% | 1345 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 38,551 psi | 89% | 1424 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 39,044 psi | 90% | 1388 fps | 100% |
| Maxam CSB 2 | <<locked>> | 84% | 38,725 psi | 89% | 1388 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 36,172 psi | 83% | 1332 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 39,001 psi | 90% | 1342 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 35,418 psi | 81% | 1250 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 36,260 psi | 83% | 1444 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 37,710 psi | 87% | 1483 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 37,449 psi | 86% | 1358 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 14,982 psi | 34% | 981 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 36,782 psi | 85% | 1444 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 36,274 psi | 83% | 1539 fps | 93.4% |
| Rottweil P 801² | <<locked>> | 68% | 38,682 psi | 89% | 1335 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 35,273 psi | 81% | 1552 fps | 100% |
| Shooters World Auto Pistol² | <<locked>> | 64% | 38,783 psi | 89% | 1535 fps | 99.6% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 34,098 psi | 78% | 1519 fps | 90.1% |
| SNPE Vectan A0 | <<locked>> | 88% | 38,841 psi | 89% | 1427 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 36,114 psi | 83% | 1342 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 35,157 psi | 81% | 1352 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 36,999 psi | 85% | 1234 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 38,522 psi | 89% | 1486 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 38,305 psi | 88% | 1398 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 34,983 psi | 80% | 1535 fps | 98.8% |
| Somchem MP200² | <<locked>> | 76% | 36,361 psi | 84% | 1437 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 36,419 psi | 84% | 1411 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 37,608 psi | 86% | 1535 fps | 96.5% |
| Vihtavuori 3N37 | <<locked>> | 84% | 37,869 psi | 87% | 1499 fps | 100% |
| Vihtavuori 3N38*ᴾ | <<locked>> | 100% | 38,290 psi | 88% | 1555 fps | 94.9% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 32,300 psi | 74% | 1529 fps | 96.5% |
| Vihtavuori N320² | <<locked>> | 76% | 38,290 psi | 88% | 1339 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 29,733 psi | 68% | 1165 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 37,594 psi | 86% | 1394 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 36,071 psi | 83% | 1407 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 36,318 psi | 83% | 1473 fps | 100% |
| Winchester 231² | <<locked>> | 68% | 39,189 psi | 90% | 1388 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 37,811 psi | 87% | 1401 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% | 22,365 psi | 51% | 1191 fps | 99.6% |
| Accurate No. 5² | <<locked>> | 60% | 34,069 psi | 78% | 1467 fps | 98.8% |
| Accurate No. 7*² | <<locked>> | 68% | 25,773 psi | 59% | 1375 fps | 85.1% |
| Accurate Solo 1000² | <<locked>> | 60% | 23,786 psi | 55% | 1129 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 20,044 psi | 46% | 1122 fps | 100% |
| Accurate TCM* | <<locked>> | 84% | 34,084 psi | 78% | 1499 fps | 85.3% |
| ADI AP 100*² | 7.3 gr | 68% | 16,418 psi | 38% | 1106 fps | 86.9% |
| ADI AP 70N² | <<locked>> | 60% | 28,950 psi | 67% | 1283 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,121 psi | 60% | 1060 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 24,801 psi | 57% | 1076 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 23,366 psi | 54% | 1096 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 25,527 psi | 59% | 1171 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 20,798 psi | 48% | 1132 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 92% | 29,312 psi | 67% | 1424 fps | 86.1% |
| Alliant BULLSEYE² | <<locked>> | 60% | 25,715 psi | 59% | 1280 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 22,974 psi | 53% | 1132 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 14,823 psi | 34% | 1043 fps | 98.1% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 18,927 psi | 44% | 1204 fps | 88.4% |
| Alliant RED DOT² | <<locked>> | 60% | 22,974 psi | 53% | 1106 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 29,022 psi | 67% | 1335 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 19,885 psi | 46% | 1171 fps | 99.9% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 22,481 psi | 52% | 1119 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,286 psi | 33% | 978 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 24,555 psi | 56% | 1178 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 22,249 psi | 51% | 1171 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 20,755 psi | 48% | 1007 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 28,514 psi | 66% | 1358 fps | 98.6% |
| Hodgdon Longshot² | <<locked>> | 60% | 31,140 psi | 72% | 1398 fps | 99.8% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,614 psi | 18% | 728 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 23,786 psi | 55% | 1198 fps | 100% |
| Lovex D036² | <<locked>> | 60% | 34,011 psi | 78% | 1467 fps | 98.8% |
| Lovex D037.1*² | <<locked>> | 68% | 25,773 psi | 59% | 1375 fps | 85.1% |
| Lovex S011² | <<locked>> | 60% | 30,023 psi | 69% | 1253 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 23,293 psi | 54% | 1211 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,203 psi | 44% | 1102 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 20,305 psi | 47% | 1132 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 21,698 psi | 50% | 1125 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 23,424 psi | 54% | 1135 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 26,281 psi | 60% | 1132 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 28,660 psi | 66% | 1335 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 32,300 psi | 74% | 1411 fps | 99.9% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 27,079 psi | 62% | 1224 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 6,976 psi | 16% | 715 fps | 98.6% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 18,463 psi | 42% | 1155 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 72% | 25,063 psi | 58% | 1342 fps | 87.3% |
| Rottweil P 801² | <<locked>> | 60% | 30,690 psi | 71% | 1240 fps | 100% |
| Rottweil P 806*² | 9.4 gr | 60% | 13,314 psi | 31% | 1099 fps | 88.6% |
| Shooters World Auto Pistol² | <<locked>> | 60% | 34,011 psi | 78% | 1467 fps | 98.8% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 25,773 psi | 59% | 1375 fps | 85.1% |
| SNPE Vectan A0² | <<locked>> | 60% | 18,869 psi | 43% | 1112 fps | 99.6% |
| SNPE Vectan A1² | <<locked>> | 60% | 23,569 psi | 54% | 1168 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 22,756 psi | 52% | 1171 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,036 psi | 64% | 1122 fps | 100% |
| SNPE Vectan BA7 1/2*² | 6.9 gr | 60% | 16,099 psi | 37% | 1076 fps | 92.5% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 22,640 psi | 52% | 1175 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 20,508 psi | 47% | 1260 fps | 92.1% |
| Somchem MP200² | <<locked>> | 60% | 23,192 psi | 53% | 1230 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 20,987 psi | 48% | 1168 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 25,266 psi | 58% | 1325 fps | 90.9% |
| Vihtavuori 3N37² | <<locked>> | 60% | 18,086 psi | 42% | 1155 fps | 95.5% |
| Vihtavuori 3N38* | <<locked>> | 80% | 21,872 psi | 50% | 1270 fps | 85.8% |
| Vihtavuori N105* | <<locked>> | 80% | 17,999 psi | 41% | 1230 fps | 86.2% |
| Vihtavuori N320² | <<locked>> | 60% | 24,555 psi | 56% | 1161 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,618 psi | 29% | 876 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 23,192 psi | 53% | 1198 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 20,305 psi | 47% | 1161 fps | 100% |
| Vihtavuori N350*² | <<locked>> | 60% | 15,708 psi | 36% | 1089 fps | 93.8% |
| Winchester 231² | <<locked>> | 60% | 31,299 psi | 72% | 1289 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 19,609 psi | 45% | 1129 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 23 powders for .357 Mag. loaded with the .355 | 130gr | Speer TMJ. Alliant POWER PISTOL delivers the highest muzzle velocity at 1,581 fps; across all powders the maximum-charge window runs from 974 fps to 1,581 fps. ADI AP 100 gives the best case fill at 100 %, and 23 of the 23 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 34–90 %, leaving at least 10 % headroom. ADI AP 100, Alliant Herco, Baschieri & Pellagri 102 Pistol 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, ADI AP 100 rank at the top here: for .357 Mag. with the .355 | 130gr | Speer TMJ 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.