Load Specifications
Load data in caliber .357 Mag. with .355 | 115gr | Norma HP bullet and 64 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>> | 76% | 38,058 psi | 87% | 1565 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 36,056 psi | 83% | 1686 fps | 90.2% |
| Accurate Solo 1000² | <<locked>> | 76% | 36,318 psi | 83% | 1437 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 35,302 psi | 81% | 1486 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 38,624 psi | 89% | 1673 fps | 98.5% |
| ADI AP 70N² | <<locked>> | 68% | 36,883 psi | 85% | 1526 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 37,521 psi | 86% | 1332 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 36,260 psi | 83% | 1352 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 38,334 psi | 88% | 1427 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 38,885 psi | 89% | 1486 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 37,202 psi | 86% | 1496 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 37,898 psi | 87% | 1703 fps | 89.9% |
| Alliant BULLSEYE² | <<locked>> | 72% | 37,043 psi | 85% | 1591 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 38,290 psi | 88% | 1483 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 36,593 psi | 84% | 1581 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 36,056 psi | 83% | 1683 fps | 97.3% |
| Alliant RED DOT | <<locked>> | 80% | 37,347 psi | 86% | 1440 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 38,290 psi | 88% | 1611 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 39,262 psi | 90% | 1627 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 38,972 psi | 90% | 1473 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 36,564 psi | 84% | 1453 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 35,839 psi | 82% | 1453 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 38,696 psi | 89% | 1378 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 38,711 psi | 89% | 1650 fps | 99.9% |
| Hodgdon Longshot² | <<locked>> | 64% | 37,695 psi | 87% | 1631 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,853 psi | 39% | 1083 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 37,710 psi | 87% | 1535 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 36,056 psi | 83% | 1686 fps | 90.2% |
| Lovex S011² | <<locked>> | 68% | 38,189 psi | 88% | 1493 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 34,679 psi | 80% | 1516 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 36,303 psi | 83% | 1496 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 36,201 psi | 83% | 1496 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 36,970 psi | 85% | 1476 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 35,752 psi | 82% | 1437 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 35,882 psi | 82% | 1385 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 37,768 psi | 87% | 1604 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 38,841 psi | 89% | 1640 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 38,856 psi | 89% | 1509 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 15,389 psi | 35% | 1086 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 38,218 psi | 88% | 1601 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 37,884 psi | 87% | 1706 fps | 93.4% |
| Rottweil P 801² | <<locked>> | 68% | 39,160 psi | 90% | 1476 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 37,246 psi | 86% | 1713 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 36,056 psi | 83% | 1686 fps | 90.2% |
| SNPE Vectan A0 | <<locked>> | 84% | 36,260 psi | 83% | 1535 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 37,188 psi | 85% | 1490 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 36,187 psi | 83% | 1499 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 37,869 psi | 87% | 1371 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 39,189 psi | 90% | 1637 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 38,798 psi | 89% | 1542 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 36,883 psi | 85% | 1706 fps | 98.8% |
| Somchem MP200² | <<locked>> | 76% | 37,768 psi | 87% | 1594 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 36,840 psi | 85% | 1555 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 39,291 psi | 90% | 1703 fps | 96.5% |
| Vihtavuori 3N37 | <<locked>> | 84% | 39,044 psi | 90% | 1657 fps | 100% |
| Vihtavuori 3N38* | <<locked>> | 96% | 35,868 psi | 82% | 1657 fps | 93.4% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 34,476 psi | 79% | 1699 fps | 96.6% |
| Vihtavuori N320² | <<locked>> | 76% | 39,291 psi | 90% | 1486 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 30,516 psi | 70% | 1293 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 39,233 psi | 90% | 1552 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 37,043 psi | 85% | 1558 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 37,159 psi | 85% | 1624 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 35,839 psi | 82% | 1483 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 38,522 psi | 89% | 1542 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% | 23,337 psi | 54% | 1329 fps | 99.6% |
| Accurate No. 7*² | <<locked>> | 72% | 31,169 psi | 72% | 1598 fps | 87.6% |
| Accurate Solo 1000² | <<locked>> | 60% | 24,439 psi | 56% | 1257 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 20,914 psi | 48% | 1250 fps | 100% |
| ADI AP 100*² | <<locked>> | 68% | 17,187 psi | 40% | 1227 fps | 86.7% |
| ADI AP 70N² | <<locked>> | 60% | 29,544 psi | 68% | 1417 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,078 psi | 60% | 1171 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,034 psi | 58% | 1191 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 24,468 psi | 56% | 1224 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 25,933 psi | 60% | 1299 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 21,437 psi | 49% | 1250 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 92% | 30,719 psi | 71% | 1575 fps | 86.1% |
| Alliant BULLSEYE² | <<locked>> | 60% | 26,774 psi | 62% | 1421 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 23,670 psi | 54% | 1260 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 15,258 psi | 35% | 1152 fps | 97.8% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 19,769 psi | 45% | 1332 fps | 88.1% |
| Alliant RED DOT² | <<locked>> | 60% | 23,525 psi | 54% | 1227 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 30,052 psi | 69% | 1486 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 20,972 psi | 48% | 1309 fps | 99.8% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 23,395 psi | 54% | 1247 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,591 psi | 34% | 1079 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 24,860 psi | 57% | 1296 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 20,755 psi | 48% | 1112 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 29,095 psi | 67% | 1496 fps | 98.4% |
| Hodgdon Longshot² | <<locked>> | 60% | 32,329 psi | 74% | 1549 fps | 99.8% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,687 psi | 18% | 801 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 24,366 psi | 56% | 1329 fps | 100% |
| Lovex D037.1*² | <<locked>> | 72% | 31,169 psi | 72% | 1598 fps | 87.6% |
| Lovex S011² | <<locked>> | 60% | 30,182 psi | 69% | 1385 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 24,047 psi | 55% | 1342 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,493 psi | 45% | 1214 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 21,176 psi | 49% | 1260 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,205 psi | 51% | 1247 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 24,018 psi | 55% | 1260 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,151 psi | 62% | 1260 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 29,080 psi | 67% | 1470 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 33,402 psi | 77% | 1562 fps | 99.9% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 27,456 psi | 63% | 1352 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,295 psi | 17% | 801 fps | 98.5% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 18,811 psi | 43% | 1266 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 72% | 26,078 psi | 60% | 1483 fps | 87% |
| Rottweil P 801² | <<locked>> | 60% | 31,444 psi | 72% | 1378 fps | 100% |
| Rottweil P 806*² | 11 gr | 60% | 14,098 psi | 32% | 1211 fps | 88.1% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 31,169 psi | 72% | 1598 fps | 87.6% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,305 psi | 44% | 1230 fps | 99.5% |
| SNPE Vectan A1² | <<locked>> | 60% | 24,207 psi | 56% | 1296 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 23,380 psi | 54% | 1296 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 27,818 psi | 64% | 1234 fps | 100% |
| SNPE Vectan BA7 1/2*² | 8 gr | 60% | 16,360 psi | 38% | 1184 fps | 91.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 23,076 psi | 53% | 1296 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 21,437 psi | 49% | 1394 fps | 91.8% |
| Somchem MP200² | <<locked>> | 60% | 24,076 psi | 55% | 1368 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 21,973 psi | 51% | 1302 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 25,947 psi | 60% | 1457 fps | 90.4% |
| Vihtavuori 3N37² | <<locked>> | 60% | 19,029 psi | 44% | 1283 fps | 95.3% |
| Vihtavuori 3N38* | <<locked>> | 80% | 22,945 psi | 53% | 1407 fps | 85.7% |
| Vihtavuori N105* | <<locked>> | 80% | 18,637 psi | 43% | 1352 fps | 85.6% |
| Vihtavuori N320² | <<locked>> | 60% | 25,599 psi | 59% | 1296 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,836 psi | 30% | 968 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 24,192 psi | 56% | 1335 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 21,103 psi | 49% | 1289 fps | 99.9% |
| Vihtavuori N350*² | 7.9 gr | 60% | 16,534 psi | 38% | 1214 fps | 93.6% |
| Winchester 231² | <<locked>> | 60% | 32,111 psi | 74% | 1430 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 20,117 psi | 46% | 1247 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 .355 | 115gr | Norma HP. Rottweil P 806 delivers the highest muzzle velocity at 1,713 fps; across all powders the maximum-charge window runs from 1,083 fps to 1,713 fps. ADI AP 100 gives the best case fill at 100 %, and 32 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 35–90 %, leaving at least 10 % headroom. ADI AP 100, Alliant BLUE DOT, Hodgdon TrailBoss 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 .355 | 115gr | Norma HP 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. Baschieri & Pellagri 102 Pistol, Hodgdon Clays, Hodgdon TrailBoss 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.