Load Specifications
Load data in caliber .357 Mag. with .355 | 115gr | X-TREME X-DEF HP bullet and 63 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N350, 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>> | 76% | 38,580 psi | 89% | 1555 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 37,057 psi | 85% | 1683 fps | 90.4% |
| Accurate Solo 1000² | <<locked>> | 76% | 37,260 psi | 86% | 1430 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 36,767 psi | 85% | 1490 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 39,305 psi | 90% | 1663 fps | 98.5% |
| ADI AP 70N² | <<locked>> | 68% | 38,885 psi | 89% | 1529 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 38,058 psi | 87% | 1322 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 36,869 psi | 85% | 1345 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 36,158 psi | 83% | 1381 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 36,114 psi | 83% | 1430 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 38,334 psi | 88% | 1490 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 38,754 psi | 89% | 1696 fps | 89.9% |
| Alliant BULLSEYE² | <<locked>> | 72% | 38,276 psi | 88% | 1591 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 36,477 psi | 84% | 1440 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 38,218 psi | 88% | 1585 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 36,695 psi | 84% | 1677 fps | 97.4% |
| Alliant RED DOT | <<locked>> | 80% | 38,667 psi | 89% | 1437 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 38,812 psi | 89% | 1601 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 36,651 psi | 84% | 1572 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 36,129 psi | 83% | 1417 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 37,782 psi | 87% | 1450 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 37,159 psi | 85% | 1450 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 36,172 psi | 83% | 1332 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 34,650 psi | 80% | 1572 fps | 99.4% |
| Hodgdon Longshot² | <<locked>> | 64% | 38,334 psi | 88% | 1621 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 18,304 psi | 42% | 1086 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 38,885 psi | 89% | 1529 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 37,057 psi | 85% | 1683 fps | 90.4% |
| Lovex S011² | <<locked>> | 68% | 39,305 psi | 90% | 1490 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 36,608 psi | 84% | 1519 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 37,014 psi | 85% | 1486 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 37,536 psi | 86% | 1490 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 38,305 psi | 88% | 1476 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 36,898 psi | 85% | 1437 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 36,869 psi | 85% | 1381 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 38,841 psi | 89% | 1598 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 36,898 psi | 85% | 1463 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 17,100 psi | 39% | 1096 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 39,218 psi | 90% | 1594 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 38,348 psi | 88% | 1693 fps | 93.3% |
| Rottweil P 801² | <<locked>> | 64% | 36,390 psi | 84% | 1421 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 39,189 psi | 90% | 1722 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 37,057 psi | 85% | 1683 fps | 90.4% |
| SNPE Vectan A0 | <<locked>> | 84% | 36,999 psi | 85% | 1526 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 37,811 psi | 87% | 1483 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 36,854 psi | 85% | 1493 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 37,710 psi | 87% | 1355 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 36,419 psi | 84% | 1578 fps | 99.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 36,492 psi | 84% | 1493 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 38,145 psi | 88% | 1703 fps | 98.9% |
| Somchem MP200² | <<locked>> | 76% | 38,899 psi | 89% | 1591 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 38,522 psi | 89% | 1558 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 36,187 psi | 83% | 1631 fps | 95.2% |
| Vihtavuori 3N37 | <<locked>> | 80% | 36,129 psi | 83% | 1598 fps | 100% |
| Vihtavuori 3N38* | <<locked>> | 96% | 37,188 psi | 85% | 1660 fps | 93.6% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 35,969 psi | 83% | 1706 fps | 96.9% |
| Vihtavuori N320² | <<locked>> | 72% | 36,347 psi | 84% | 1430 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 32,343 psi | 74% | 1293 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 35,897 psi | 83% | 1493 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 38,000 psi | 87% | 1555 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 38,522 psi | 89% | 1624 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 37,275 psi | 86% | 1483 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 36,230 psi | 83% | 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% | 23,801 psi | 55% | 1316 fps | 99.6% |
| Accurate No. 7*² | <<locked>> | 68% | 28,297 psi | 65% | 1522 fps | 85.5% |
| Accurate Solo 1000² | <<locked>> | 60% | 25,164 psi | 58% | 1250 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 22,104 psi | 51% | 1253 fps | 100% |
| ADI AP 100*² | 7.8 gr | 64% | 16,404 psi | 38% | 1181 fps | 85.6% |
| ADI AP 70N² | <<locked>> | 60% | 31,299 psi | 72% | 1424 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 27,151 psi | 62% | 1171 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,483 psi | 59% | 1181 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 25,382 psi | 58% | 1220 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 27,064 psi | 62% | 1296 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 22,408 psi | 52% | 1250 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 92% | 32,082 psi | 74% | 1581 fps | 86.6% |
| Alliant BULLSEYE² | <<locked>> | 60% | 27,151 psi | 62% | 1411 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 24,787 psi | 57% | 1257 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 16,810 psi | 39% | 1171 fps | 98.6% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 20,914 psi | 48% | 1342 fps | 89% |
| Alliant RED DOT² | <<locked>> | 60% | 24,540 psi | 56% | 1224 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 31,198 psi | 72% | 1486 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 21,973 psi | 51% | 1306 fps | 99.9% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 24,511 psi | 56% | 1247 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 16,041 psi | 37% | 1089 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 26,063 psi | 60% | 1296 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,857 psi | 50% | 1115 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 30,313 psi | 70% | 1496 fps | 98.5% |
| Hodgdon Longshot² | <<locked>> | 60% | 33,649 psi | 77% | 1549 fps | 99.8% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 9,253 psi | 21% | 823 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 26,005 psi | 60% | 1332 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 28,297 psi | 65% | 1522 fps | 85.5% |
| Lovex S011² | <<locked>> | 60% | 31,096 psi | 71% | 1381 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 25,614 psi | 59% | 1352 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 20,682 psi | 48% | 1217 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 22,916 psi | 53% | 1266 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 23,221 psi | 53% | 1247 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 24,976 psi | 57% | 1257 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,978 psi | 64% | 1253 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 30,037 psi | 69% | 1470 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 29,385 psi | 68% | 1358 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 8,717 psi | 20% | 817 fps | 99.8% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 20,233 psi | 47% | 1280 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 68% | 24,149 psi | 56% | 1417 fps | 85.2% |
| Rottweil P 801² | <<locked>> | 60% | 32,590 psi | 75% | 1368 fps | 100% |
| Rottweil P 806*² | <<locked>> | 60% | 16,070 psi | 37% | 1250 fps | 90.7% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 28,297 psi | 65% | 1522 fps | 85.5% |
| SNPE Vectan A0² | <<locked>> | 60% | 20,421 psi | 47% | 1234 fps | 99.7% |
| SNPE Vectan A1² | <<locked>> | 60% | 25,324 psi | 58% | 1296 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 24,424 psi | 56% | 1299 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,311 psi | 65% | 1227 fps | 100% |
| SNPE Vectan BA7 1/2*² | 7.8 gr | 60% | 17,753 psi | 41% | 1201 fps | 93% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 24,381 psi | 56% | 1302 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 23,148 psi | 53% | 1414 fps | 92.9% |
| Somchem MP200² | <<locked>> | 60% | 25,019 psi | 57% | 1365 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 22,640 psi | 52% | 1296 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 27,731 psi | 64% | 1473 fps | 91.3% |
| Vihtavuori 3N37² | <<locked>> | 60% | 20,247 psi | 47% | 1289 fps | 96% |
| Vihtavuori 3N38* | <<locked>> | 80% | 24,120 psi | 55% | 1411 fps | 86.3% |
| Vihtavuori N105* | <<locked>> | 80% | 20,349 psi | 47% | 1378 fps | 87.2% |
| Vihtavuori N320² | <<locked>> | 60% | 26,861 psi | 62% | 1296 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 14,721 psi | 34% | 984 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 25,657 psi | 59% | 1339 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 22,495 psi | 52% | 1299 fps | 100% |
| Vihtavuori N350*² | 7.6 gr | 60% | 17,608 psi | 40% | 1220 fps | 94.5% |
| Winchester 231² | <<locked>> | 60% | 32,779 psi | 75% | 1421 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 21,683 psi | 50% | 1257 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 63 powders for .357 Mag. loaded with the .355 | 115gr | X-TREME X-DEF HP. Rottweil P 806 delivers the highest muzzle velocity at 1,722 fps; across all powders the maximum-charge window runs from 1,086 fps to 1,722 fps. ADI AP 100 gives the best case fill at 100 %, and 28 of the 63 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 39–90 %, 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. Vihtavuori N350, ADI AP 100, SNPE Vectan BA7 1/2 rank at the top here: for .357 Mag. with the .355 | 115gr | X-TREME X-DEF 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.