Load Specifications
Load data in caliber .357 Mag. with .355 | 115gr | Sierra Sports Master bullet and 65 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% | 37,637 psi | 87% | 1558 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 35,911 psi | 83% | 1680 fps | 90.1% |
| Accurate Solo 1000 | <<locked>> | 80% | 39,233 psi | 90% | 1470 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 39,044 psi | 90% | 1532 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 38,406 psi | 88% | 1667 fps | 98.4% |
| ADI AP 70N² | <<locked>> | 68% | 37,289 psi | 86% | 1526 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 37,898 psi | 87% | 1335 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 36,593 psi | 84% | 1355 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 38,682 psi | 89% | 1430 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 38,406 psi | 88% | 1480 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 36,840 psi | 85% | 1490 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 37,768 psi | 87% | 1699 fps | 89.7% |
| Alliant BULLSEYE² | <<locked>> | 72% | 37,391 psi | 86% | 1591 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 38,638 psi | 89% | 1486 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 36,318 psi | 83% | 1575 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 35,737 psi | 82% | 1677 fps | 97.2% |
| Alliant RED DOT | <<locked>> | 80% | 36,840 psi | 85% | 1430 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 37,855 psi | 87% | 1601 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 38,841 psi | 89% | 1621 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 35,157 psi | 81% | 1424 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 39,334 psi | 90% | 1483 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 35,549 psi | 82% | 1447 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 76% | 35,955 psi | 83% | 1506 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 38,247 psi | 88% | 1371 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 38,479 psi | 88% | 1647 fps | 99.9% |
| Hodgdon Longshot² | <<locked>> | 64% | 37,391 psi | 86% | 1624 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,549 psi | 38% | 1076 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 37,289 psi | 86% | 1526 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 35,911 psi | 83% | 1680 fps | 90.1% |
| Lovex S011² | <<locked>> | 68% | 38,595 psi | 89% | 1496 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 39,363 psi | 90% | 1575 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 39,030 psi | 90% | 1526 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 35,781 psi | 82% | 1490 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 37,318 psi | 86% | 1480 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 36,071 psi | 83% | 1444 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 36,230 psi | 83% | 1388 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 37,478 psi | 86% | 1598 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 38,537 psi | 89% | 1634 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 38,348 psi | 88% | 1503 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 15,098 psi | 35% | 1076 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 37,811 psi | 87% | 1594 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 37,681 psi | 87% | 1696 fps | 93.2% |
| Rottweil P 801² | <<locked>> | 68% | 38,725 psi | 89% | 1467 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 36,434 psi | 84% | 1703 fps | 99.9% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 35,911 psi | 83% | 1680 fps | 90.1% |
| SNPE Vectan A0 | <<locked>> | 84% | 36,666 psi | 84% | 1539 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 37,565 psi | 86% | 1493 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 36,579 psi | 84% | 1503 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 37,434 psi | 86% | 1365 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 39,001 psi | 90% | 1631 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 39,189 psi | 90% | 1542 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 36,550 psi | 84% | 1699 fps | 98.7% |
| Somchem MP200² | <<locked>> | 76% | 37,391 psi | 86% | 1588 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 37,188 psi | 85% | 1558 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 39,088 psi | 90% | 1693 fps | 96.4% |
| Vihtavuori 3N37 | <<locked>> | 84% | 38,769 psi | 89% | 1650 fps | 100% |
| Vihtavuori 3N38* | <<locked>> | 96% | 35,665 psi | 82% | 1654 fps | 93.3% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 34,258 psi | 79% | 1693 fps | 96.4% |
| Vihtavuori N320² | <<locked>> | 76% | 38,769 psi | 89% | 1480 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 30,821 psi | 71% | 1293 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 38,754 psi | 89% | 1545 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 37,449 psi | 86% | 1565 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 36,811 psi | 85% | 1617 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 36,201 psi | 83% | 1486 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 38,130 psi | 88% | 1539 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% | 22,916 psi | 53% | 1319 fps | 99.5% |
| Accurate No. 7*² | <<locked>> | 72% | 30,995 psi | 71% | 1594 fps | 87.5% |
| Accurate Solo 1000² | <<locked>> | 60% | 23,989 psi | 55% | 1247 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 20,523 psi | 47% | 1240 fps | 100% |
| ADI AP 100*² | <<locked>> | 68% | 16,955 psi | 39% | 1220 fps | 86.3% |
| ADI AP 70N² | <<locked>> | 60% | 29,124 psi | 67% | 1411 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,295 psi | 60% | 1175 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,251 psi | 58% | 1191 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 23,975 psi | 55% | 1214 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 25,469 psi | 59% | 1289 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 21,089 psi | 48% | 1243 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 92% | 30,545 psi | 70% | 1572 fps | 86% |
| Alliant BULLSEYE² | <<locked>> | 60% | 26,339 psi | 61% | 1411 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 23,859 psi | 55% | 1263 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 15,011 psi | 35% | 1142 fps | 97.6% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 19,508 psi | 45% | 1322 fps | 87.8% |
| Alliant RED DOT² | <<locked>> | 60% | 23,018 psi | 53% | 1217 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 29,660 psi | 68% | 1476 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 20,595 psi | 47% | 1299 fps | 99.8% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 22,945 psi | 53% | 1240 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,721 psi | 34% | 1083 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 25,106 psi | 58% | 1299 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 22,582 psi | 52% | 1289 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 20,914 psi | 48% | 1115 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 29,443 psi | 68% | 1499 fps | 98.4% |
| Hodgdon Longshot² | <<locked>> | 60% | 32,010 psi | 74% | 1542 fps | 99.7% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,716 psi | 18% | 804 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 24,584 psi | 56% | 1332 fps | 100% |
| Lovex D037.1*² | <<locked>> | 72% | 30,995 psi | 71% | 1594 fps | 87.5% |
| Lovex S011² | <<locked>> | 60% | 30,472 psi | 70% | 1388 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 24,294 psi | 56% | 1348 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,131 psi | 44% | 1204 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 20,784 psi | 48% | 1250 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,365 psi | 51% | 1250 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 23,540 psi | 54% | 1250 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 26,629 psi | 61% | 1250 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 29,341 psi | 67% | 1473 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 33,779 psi | 78% | 1565 fps | 99.9% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 27,702 psi | 64% | 1355 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,078 psi | 16% | 787 fps | 98.2% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 18,956 psi | 44% | 1273 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 72% | 25,904 psi | 60% | 1480 fps | 86.8% |
| Rottweil P 801² | <<locked>> | 60% | 30,995 psi | 71% | 1368 fps | 100% |
| Rottweil P 806*² | 10.9 gr | 60% | 13,953 psi | 32% | 1204 fps | 87.9% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 30,995 psi | 71% | 1594 fps | 87.5% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,493 psi | 45% | 1234 fps | 99.5% |
| SNPE Vectan A1² | <<locked>> | 60% | 23,859 psi | 55% | 1286 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 23,032 psi | 53% | 1289 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,065 psi | 65% | 1237 fps | 100% |
| SNPE Vectan BA7 1/2*² | 8 gr | 60% | 16,505 psi | 38% | 1188 fps | 91.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 22,684 psi | 52% | 1289 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 21,176 psi | 49% | 1385 fps | 91.5% |
| Somchem MP200² | <<locked>> | 60% | 23,714 psi | 55% | 1358 fps | 99.9% |
| Somchem MS200² | <<locked>> | 60% | 21,596 psi | 50% | 1293 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 25,715 psi | 59% | 1453 fps | 90.3% |
| Vihtavuori 3N37² | <<locked>> | 60% | 18,782 psi | 43% | 1276 fps | 95.1% |
| Vihtavuori 3N38* | <<locked>> | 80% | 22,771 psi | 52% | 1401 fps | 85.4% |
| Vihtavuori N105* | <<locked>> | 80% | 18,434 psi | 42% | 1345 fps | 85.3% |
| Vihtavuori N320² | <<locked>> | 60% | 25,135 psi | 58% | 1286 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,923 psi | 30% | 968 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 23,743 psi | 55% | 1325 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 20,769 psi | 48% | 1283 fps | 99.9% |
| Vihtavuori N350*² | 7.8 gr | 60% | 16,273 psi | 37% | 1204 fps | 93.4% |
| Winchester 231² | <<locked>> | 60% | 31,720 psi | 73% | 1424 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 20,291 psi | 47% | 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 20 powders for .357 Mag. loaded with the .355 | 115gr | Sierra Sports Master. Rottweil P 806 delivers the highest muzzle velocity at 1,703 fps; across all powders the maximum-charge window runs from 1,076 fps to 1,703 fps. ADI AP 100 gives the best case fill at 100 %, and 20 of the 20 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, Baschieri & Pellagri 102 Pistol, 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 | Sierra Sports Master 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 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.