Load Specifications
Load data in caliber .357 Mag. with .355 | 115gr | 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, Vihtavuori N350 and ReloadSwiss RS 20.
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% | 35,694 psi | 82% | 1512 fps | 100% |
| Accurate No. 5² | <<locked>> | 64% | 37,565 psi | 86% | 1634 fps | 98.8% |
| Accurate No. 7* | <<locked>> | 80% | 37,710 psi | 87% | 1686 fps | 90.1% |
| Accurate Solo 1000 | <<locked>> | 80% | 37,884 psi | 87% | 1434 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 37,188 psi | 85% | 1493 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 35,868 psi | 82% | 1608 fps | 97.3% |
| ADI AP 70N² | <<locked>> | 68% | 35,288 psi | 81% | 1486 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 36,970 psi | 85% | 1302 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 38,435 psi | 88% | 1358 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 37,101 psi | 85% | 1391 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 36,985 psi | 85% | 1444 fps | 100% |
| Alliant BE-86 | <<locked>> | 84% | 38,885 psi | 89% | 1496 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 34,838 psi | 80% | 1627 fps | 87.5% |
| Alliant BULLSEYE² | <<locked>> | 76% | 38,899 psi | 89% | 1594 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 37,072 psi | 85% | 1447 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 37,594 psi | 86% | 1578 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 84% | 37,130 psi | 85% | 1677 fps | 97.1% |
| Alliant RED DOT | <<locked>> | 84% | 38,696 psi | 89% | 1434 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 36,071 psi | 83% | 1558 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 37,260 psi | 86% | 1578 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 37,376 psi | 86% | 1430 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 37,492 psi | 86% | 1447 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 37,768 psi | 87% | 1457 fps | 100% |
| Hodgdon CFE Pistol | <<locked>> | 80% | 37,710 psi | 87% | 1509 fps | 100% |
| Hodgdon Clays² | <<locked>> | 76% | 37,362 psi | 86% | 1322 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 35,810 psi | 82% | 1585 fps | 99.4% |
| Hodgdon Longshot² | <<locked>> | 64% | 35,273 psi | 81% | 1575 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 15,577 psi | 36% | 1043 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 36,100 psi | 83% | 1496 fps | 100% |
| Lovex D036² | <<locked>> | 64% | 37,550 psi | 86% | 1634 fps | 98.8% |
| Lovex D037.1* | <<locked>> | 80% | 37,710 psi | 87% | 1686 fps | 90.1% |
| Lovex S011² | <<locked>> | 68% | 36,506 psi | 84% | 1450 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 36,651 psi | 84% | 1522 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 37,362 psi | 86% | 1486 fps | 100% |
| Maxam CSB 2 | <<locked>> | 84% | 37,028 psi | 85% | 1490 fps | 100% |
| Maxam CSB 3 | <<locked>> | 84% | 38,740 psi | 89% | 1480 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 38,145 psi | 88% | 1447 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 38,130 psi | 88% | 1391 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 35,650 psi | 82% | 1552 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 36,492 psi | 84% | 1588 fps | 99.9% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 36,999 psi | 85% | 1470 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 14,214 psi | 33% | 1043 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 35,433 psi | 81% | 1549 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 88% | 39,204 psi | 90% | 1699 fps | 93.1% |
| Rottweil P 801² | <<locked>> | 68% | 37,478 psi | 86% | 1437 fps | 100% |
| Rottweil P 806 | <<locked>> | 92% | 38,247 psi | 88% | 1709 fps | 99.9% |
| Shooters World Auto Pistol² | <<locked>> | 64% | 37,550 psi | 86% | 1634 fps | 98.8% |
| Shooters World Major Pistol* | <<locked>> | 80% | 37,710 psi | 87% | 1686 fps | 90.1% |
| SNPE Vectan A0 | <<locked>> | 88% | 37,666 psi | 87% | 1529 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 35,462 psi | 82% | 1450 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 80% | 38,130 psi | 88% | 1506 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 35,998 psi | 83% | 1329 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 37,115 psi | 85% | 1585 fps | 99.9% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 37,565 psi | 86% | 1506 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 80% | 38,058 psi | 87% | 1699 fps | 98.6% |
| Somchem MP200 | <<locked>> | 80% | 39,349 psi | 90% | 1594 fps | 100% |
| Somchem MS200 | <<locked>> | 84% | 39,001 psi | 90% | 1562 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 36,999 psi | 85% | 1640 fps | 95.1% |
| Vihtavuori 3N37 | <<locked>> | 84% | 36,550 psi | 84% | 1601 fps | 100% |
| Vihtavuori 3N38*ᴾ | <<locked>> | 100% | 37,173 psi | 85% | 1654 fps | 93.1% |
| Vihtavuori N105*ᴾ | <<locked>> | 100% | 31,212 psi | 72% | 1621 fps | 94.6% |
| Vihtavuori N310² | <<locked>> | 64% | 39,088 psi | 90% | 1365 fps | 100% |
| Vihtavuori N320² | <<locked>> | 76% | 37,246 psi | 86% | 1444 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 28,964 psi | 67% | 1253 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 36,796 psi | 85% | 1503 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 35,114 psi | 81% | 1512 fps | 100% |
| Vihtavuori N350 | <<locked>> | 92% | 38,421 psi | 88% | 1621 fps | 100% |
| Winchester 231² | <<locked>> | 68% | 38,624 psi | 89% | 1496 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 36,405 psi | 84% | 1499 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% | 22,147 psi | 51% | 1283 fps | 99% |
| Accurate No. 5² | <<locked>> | 60% | 33,185 psi | 76% | 1565 fps | 97.8% |
| Accurate No. 7*² | <<locked>> | 72% | 28,543 psi | 66% | 1529 fps | 85.1% |
| Accurate Solo 1000² | <<locked>> | 60% | 23,453 psi | 54% | 1224 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 19,493 psi | 45% | 1204 fps | 100% |
| ADI AP 100*² | <<locked>> | 72% | 17,854 psi | 41% | 1230 fps | 86.6% |
| ADI AP 70N² | <<locked>> | 60% | 27,630 psi | 64% | 1371 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 25,541 psi | 59% | 1145 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 24,569 psi | 56% | 1165 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 23,235 psi | 53% | 1188 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 24,250 psi | 56% | 1253 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 19,899 psi | 46% | 1207 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 31,676 psi | 73% | 1572 fps | 85.8% |
| Alliant BULLSEYE² | <<locked>> | 60% | 25,425 psi | 58% | 1378 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 22,481 psi | 52% | 1224 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 14,286 psi | 33% | 1106 fps | 96.6% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 18,637 psi | 43% | 1283 fps | 86.2% |
| Alliant RED DOT² | <<locked>> | 60% | 22,176 psi | 51% | 1188 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 28,340 psi | 65% | 1437 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 19,711 psi | 45% | 1263 fps | 99.4% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 21,886 psi | 50% | 1204 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 13,895 psi | 32% | 1050 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 23,438 psi | 54% | 1257 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 21,843 psi | 50% | 1263 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,759 psi | 59% | 1161 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 27,311 psi | 63% | 1444 fps | 97.3% |
| Hodgdon Longshot² | <<locked>> | 60% | 30,487 psi | 70% | 1496 fps | 99.2% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,310 psi | 17% | 778 fps | 99.9% |
| Hodgdon Universal² | <<locked>> | 60% | 22,974 psi | 53% | 1286 fps | 100% |
| Lovex D036² | <<locked>> | 60% | 33,127 psi | 76% | 1565 fps | 97.8% |
| Lovex D037.1*² | <<locked>> | 72% | 28,543 psi | 66% | 1529 fps | 85.1% |
| Lovex S011² | <<locked>> | 60% | 28,892 psi | 66% | 1345 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 22,800 psi | 52% | 1306 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 18,115 psi | 42% | 1168 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 19,609 psi | 45% | 1214 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 21,219 psi | 49% | 1214 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 22,989 psi | 53% | 1227 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 25,976 psi | 60% | 1227 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 27,354 psi | 63% | 1421 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 31,531 psi | 72% | 1509 fps | 99.4% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 25,904 psi | 60% | 1312 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 6,701 psi | 15% | 761 fps | 97.3% |
| ReloadSwiss RS 20² | 6.7 gr | 60% | 17,593 psi | 40% | 1227 fps | 99.8% |
| ReloadSwiss RS 24*² | <<locked>> | 76% | 27,369 psi | 63% | 1490 fps | 87.1% |
| Rottweil P 801² | <<locked>> | 60% | 29,370 psi | 68% | 1329 fps | 100% |
| Rottweil P 806*² | 10.7 gr | 64% | 14,576 psi | 34% | 1217 fps | 88.2% |
| Shooters World Auto Pistol² | <<locked>> | 60% | 33,127 psi | 76% | 1565 fps | 97.8% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 28,543 psi | 66% | 1529 fps | 85.1% |
| SNPE Vectan A0² | <<locked>> | 60% | 18,231 psi | 42% | 1184 fps | 98.8% |
| SNPE Vectan A1² | <<locked>> | 60% | 23,250 psi | 53% | 1260 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 22,220 psi | 51% | 1260 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 26,977 psi | 62% | 1204 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 15,664 psi | 36% | 1145 fps | 90.4% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 21,814 psi | 50% | 1257 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 19,769 psi | 45% | 1339 fps | 89.8% |
| Somchem MP200² | <<locked>> | 60% | 22,597 psi | 52% | 1319 fps | 99.6% |
| Somchem MS200² | <<locked>> | 60% | 20,784 psi | 48% | 1260 fps | 99.9% |
| Somchem S221*² | <<locked>> | 60% | 24,468 psi | 56% | 1404 fps | 88.6% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 17,869 psi | 41% | 1237 fps | 93.8% |
| Vihtavuori 3N38* | <<locked>> | 84% | 23,511 psi | 54% | 1398 fps | 85.2% |
| Vihtavuori N105* | <<locked>> | 84% | 19,377 psi | 45% | 1355 fps | 85.5% |
| Vihtavuori N310² | <<locked>> | 60% | 35,056 psi | 81% | 1316 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 23,888 psi | 55% | 1253 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,169 psi | 28% | 942 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 22,800 psi | 52% | 1293 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 19,957 psi | 46% | 1250 fps | 99.6% |
| Vihtavuori N350*² | 7.2 gr | 60% | 15,273 psi | 35% | 1161 fps | 91.7% |
| Winchester 231² | <<locked>> | 60% | 30,472 psi | 70% | 1391 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 19,189 psi | 44% | 1211 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 25 powders for .357 Mag. loaded with the .355 | 115gr | Speer TMJ. Rottweil P 806 delivers the highest muzzle velocity at 1,709 fps; across all powders the maximum-charge window runs from 1,043 fps to 1,709 fps. ADI AP 100 gives the best case fill at 100 %, and 25 of the 25 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 33–90 %, 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, Vihtavuori N350, ReloadSwiss RS 20 rank at the top here: for .357 Mag. with the .355 | 115gr | 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, Vihtavuori N105 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.