Load Specifications
Load data in caliber .357 Mag. with .355 | 124gr | Hornady XTP bullet and 65 powders. The key underlying parameters are shown in the table above.
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% | 37,231 psi | 86% | 1470 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 34,954 psi | 80% | 1588 fps | 90.3% |
| Accurate Solo 1000 | <<locked>> | 80% | 39,088 psi | 90% | 1388 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 38,682 psi | 89% | 1447 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 38,334 psi | 88% | 1585 fps | 98.7% |
| ADI AP 70N² | <<locked>> | 68% | 36,753 psi | 84% | 1440 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 37,768 psi | 87% | 1257 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 35,969 psi | 83% | 1273 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 38,203 psi | 88% | 1345 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 38,261 psi | 88% | 1398 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 37,057 psi | 85% | 1414 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 36,724 psi | 84% | 1604 fps | 90% |
| Alliant BULLSEYE² | <<locked>> | 72% | 36,811 psi | 85% | 1499 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 38,580 psi | 89% | 1404 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 39,262 psi | 90% | 1532 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 35,186 psi | 81% | 1585 fps | 97.5% |
| Alliant RED DOT | <<locked>> | 80% | 37,072 psi | 85% | 1355 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 37,550 psi | 86% | 1512 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 38,885 psi | 89% | 1535 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 38,769 psi | 89% | 1388 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 39,044 psi | 90% | 1401 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 35,650 psi | 82% | 1371 fps | 100% |
| Hodgdon CFE Pistol | <<locked>> | 80% | 39,204 psi | 90% | 1467 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 38,783 psi | 89% | 1302 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 38,290 psi | 88% | 1558 fps | 99.9% |
| Hodgdon Longshot² | <<locked>> | 64% | 36,927 psi | 85% | 1535 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,259 psi | 37% | 1010 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 37,579 psi | 86% | 1450 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 34,954 psi | 80% | 1588 fps | 90.3% |
| Lovex S011² | <<locked>> | 68% | 37,826 psi | 87% | 1404 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 39,291 psi | 90% | 1490 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 38,885 psi | 89% | 1444 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 36,114 psi | 83% | 1414 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 36,535 psi | 84% | 1391 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 35,810 psi | 82% | 1358 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 39,276 psi | 90% | 1345 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 37,188 psi | 85% | 1512 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 38,203 psi | 88% | 1549 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 38,609 psi | 89% | 1424 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 15,331 psi | 35% | 1024 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 37,246 psi | 86% | 1503 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 36,767 psi | 85% | 1604 fps | 93.4% |
| Rottweil P 801² | <<locked>> | 68% | 38,899 psi | 89% | 1391 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 35,810 psi | 82% | 1614 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 34,954 psi | 80% | 1588 fps | 90.3% |
| SNPE Vectan A0 | <<locked>> | 84% | 35,940 psi | 83% | 1447 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 36,738 psi | 84% | 1404 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 35,723 psi | 82% | 1414 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 37,753 psi | 87% | 1293 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 38,783 psi | 89% | 1545 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 39,044 psi | 90% | 1460 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 36,274 psi | 83% | 1611 fps | 98.9% |
| Somchem MP200² | <<locked>> | 76% | 37,623 psi | 86% | 1509 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 37,130 psi | 85% | 1476 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 38,841 psi | 89% | 1611 fps | 96.8% |
| Vihtavuori 3N37 | <<locked>> | 84% | 38,392 psi | 88% | 1562 fps | 100% |
| Vihtavuori 3N38ᴾ | <<locked>> | 100% | 39,349 psi | 90% | 1627 fps | 95.2% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 33,533 psi | 77% | 1601 fps | 96.7% |
| Vihtavuori N320² | <<locked>> | 76% | 38,725 psi | 89% | 1398 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 30,806 psi | 71% | 1224 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 38,493 psi | 88% | 1457 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 36,666 psi | 84% | 1470 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 36,970 psi | 85% | 1539 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 35,708 psi | 82% | 1401 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 37,985 psi | 87% | 1457 fps | 100% |
Start Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 23,105 psi | 53% | 1253 fps | 99.7% |
| Accurate No. 7*² | <<locked>> | 68% | 26,339 psi | 61% | 1434 fps | 85.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 24,265 psi | 56% | 1184 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 20,349 psi | 47% | 1171 fps | 100% |
| ADI AP 100*² | <<locked>> | 68% | 17,027 psi | 39% | 1161 fps | 87.3% |
| ADI AP 70N² | <<locked>> | 60% | 29,544 psi | 68% | 1342 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,179 psi | 60% | 1106 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 24,642 psi | 57% | 1115 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 24,047 psi | 55% | 1148 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 25,918 psi | 60% | 1227 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 21,364 psi | 49% | 1184 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 92% | 30,371 psi | 70% | 1493 fps | 86.6% |
| Alliant BULLSEYE² | <<locked>> | 60% | 26,513 psi | 61% | 1342 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 23,496 psi | 54% | 1188 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 14,968 psi | 34% | 1086 fps | 98% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 19,580 psi | 45% | 1263 fps | 88.7% |
| Alliant RED DOT² | <<locked>> | 60% | 23,003 psi | 53% | 1148 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 29,515 psi | 68% | 1398 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 20,624 psi | 47% | 1234 fps | 99.9% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 22,785 psi | 52% | 1168 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,562 psi | 33% | 1020 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 24,453 psi | 56% | 1220 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 22,843 psi | 53% | 1227 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 20,827 psi | 48% | 1050 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 28,616 psi | 66% | 1411 fps | 98.5% |
| Hodgdon Longshot² | <<locked>> | 60% | 31,937 psi | 73% | 1463 fps | 99.8% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,629 psi | 18% | 758 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 24,627 psi | 57% | 1260 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 26,339 psi | 61% | 1434 fps | 85.2% |
| Lovex S011² | <<locked>> | 60% | 29,979 psi | 69% | 1306 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 23,960 psi | 55% | 1270 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,522 psi | 45% | 1148 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 20,624 psi | 47% | 1181 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,104 psi | 51% | 1178 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 23,859 psi | 55% | 1188 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 26,890 psi | 62% | 1184 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 28,558 psi | 66% | 1385 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 33,040 psi | 76% | 1473 fps | 99.9% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 27,166 psi | 62% | 1273 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,252 psi | 17% | 758 fps | 98.8% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 18,565 psi | 43% | 1198 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 72% | 25,541 psi | 59% | 1401 fps | 87.4% |
| Rottweil P 801² | <<locked>> | 60% | 31,430 psi | 72% | 1299 fps | 100% |
| Rottweil P 806*² | <<locked>> | 60% | 13,822 psi | 32% | 1148 fps | 88.8% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 26,339 psi | 61% | 1434 fps | 85.2% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,000 psi | 44% | 1158 fps | 99.6% |
| SNPE Vectan A1² | <<locked>> | 60% | 24,163 psi | 56% | 1224 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 23,293 psi | 54% | 1227 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 27,659 psi | 64% | 1161 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 16,418 psi | 38% | 1125 fps | 92.6% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 22,727 psi | 52% | 1220 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 21,060 psi | 48% | 1319 fps | 92.2% |
| Somchem MP200² | <<locked>> | 60% | 23,598 psi | 54% | 1286 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 21,683 psi | 50% | 1227 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 25,773 psi | 59% | 1381 fps | 90.9% |
| Vihtavuori 3N37² | <<locked>> | 60% | 18,826 psi | 43% | 1214 fps | 95.7% |
| Vihtavuori 3N38* | <<locked>> | 80% | 22,394 psi | 51% | 1325 fps | 86% |
| Vihtavuori N105* | <<locked>> | 80% | 18,463 psi | 42% | 1286 fps | 86.4% |
| Vihtavuori N320² | <<locked>> | 60% | 24,918 psi | 57% | 1214 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,763 psi | 29% | 912 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 23,946 psi | 55% | 1260 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 20,929 psi | 48% | 1217 fps | 100% |
| Vihtavuori N350*² | <<locked>> | 60% | 16,085 psi | 37% | 1142 fps | 93.9% |
| Winchester 231² | <<locked>> | 60% | 31,691 psi | 73% | 1345 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 20,073 psi | 46% | 1178 fps | 100% |
* 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 65 powders for .357 Mag. loaded with the .355 | 124gr | Hornady XTP. Vihtavuori 3N38 delivers the highest muzzle velocity at 1,627 fps; across all powders the maximum-charge window runs from 1,010 fps to 1,627 fps. ADI AP 100 gives the best case fill at 100 %, and 34 of the 65 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, Alliant Herco 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. As outliers, Accurate No. 7, Alliant BLUE DOT, Lovex D037.1 burn incompletely and react more sensitively to barrel length and temperature. ADI APS 350, ADI APS 450, Alliant Herco 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.