Load Specifications
Load data in caliber .357 Maximum with .355 | 124gr | X-TREME FP bullet and 62 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: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 64% | 36,100 psi | 80% | 1640 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 36,999 psi | 82% | 1834 fps | 97.1% |
| Accurate No. 9*² | <<locked>> | 72% | 37,521 psi | 83% | 1841 fps | 93% |
| Accurate Solo 1000² | <<locked>> | 68% | 37,478 psi | 83% | 1539 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 38,667 psi | 86% | 1614 fps | 100% |
| Accurate TCM*² | <<locked>> | 72% | 37,173 psi | 83% | 1827 fps | 94% |
| ADI AP 100 | <<locked>> | 84% | 37,768 psi | 84% | 1778 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 40,030 psi | 89% | 1463 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 39,610 psi | 88% | 1493 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 40,451 psi | 90% | 1542 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 40,669 psi | 90% | 1594 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 36,013 psi | 80% | 1837 fps | 89.7% |
| Alliant BE-86² | <<locked>> | 72% | 40,422 psi | 90% | 1614 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 37,434 psi | 83% | 1837 fps | 96.5% |
| Alliant BULLSEYE² | <<locked>> | 64% | 39,856 psi | 89% | 1722 fps | 100% |
| Alliant Green Dot² | <<locked>> | 68% | 37,739 psi | 84% | 1558 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 39,030 psi | 87% | 1699 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 36,883 psi | 82% | 1814 fps | 100% |
| Alliant RED DOT² | <<locked>> | 72% | 39,117 psi | 87% | 1545 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 40,001 psi | 89% | 1722 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 37,768 psi | 84% | 1542 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 37,550 psi | 84% | 1542 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 38,290 psi | 85% | 1558 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 39,320 psi | 87% | 1483 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 92% | 37,637 psi | 84% | 1949 fps | 91.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 22,829 psi | 51% | 1250 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 37,275 psi | 83% | 1604 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 36,999 psi | 82% | 1834 fps | 97.1% |
| Lovex D037.2*² | <<locked>> | 72% | 38,435 psi | 85% | 1857 fps | 93.4% |
| Lovex S020² | <<locked>> | 64% | 38,290 psi | 85% | 1644 fps | 100% |
| Maxam CSB 1² | <<locked>> | 76% | 39,494 psi | 88% | 1617 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 37,217 psi | 83% | 1578 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 39,697 psi | 88% | 1598 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 38,029 psi | 85% | 1552 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 40,654 psi | 90% | 1532 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 80% | 35,955 psi | 80% | 1844 fps | 90.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 21,886 psi | 49% | 1273 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 39,218 psi | 87% | 1693 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 39,073 psi | 87% | 1860 fps | 98.9% |
| Rottweil P 806² | <<locked>> | 72% | 37,681 psi | 84% | 1801 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 72% | 38,435 psi | 85% | 1857 fps | 93.4% |
| Shooters World Major Pistol² | <<locked>> | 64% | 36,999 psi | 82% | 1834 fps | 97.1% |
| SNPE Vectan A0² | <<locked>> | 76% | 39,987 psi | 89% | 1677 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 39,175 psi | 87% | 1604 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 38,522 psi | 86% | 1621 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 40,205 psi | 89% | 1499 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 28,776 psi | 64% | 1686 fps | 89.3% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 36,811 psi | 82% | 1706 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 38,566 psi | 86% | 1621 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 38,711 psi | 86% | 1834 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 37,188 psi | 83% | 1677 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 36,898 psi | 82% | 1644 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 72% | 40,335 psi | 90% | 1772 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 84% | 39,885 psi | 89% | 1850 fps | 99.4% |
| Vihtavuori N105 | <<locked>> | 84% | 36,738 psi | 82% | 1837 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 35,810 psi | 80% | 1854 fps | 90.2% |
| Vihtavuori N320² | <<locked>> | 64% | 38,043 psi | 85% | 1552 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 39,827 psi | 89% | 1480 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 37,826 psi | 84% | 1611 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 37,376 psi | 83% | 1650 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 39,102 psi | 87% | 1749 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 38,812 psi | 86% | 1631 fps | 100% |
Start Load - Barrel Length: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 31,923 psi | 71% | 1575 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 32,198 psi | 72% | 1745 fps | 95.4% |
| Accurate No. 9*² | <<locked>> | 60% | 24,700 psi | 55% | 1572 fps | 85.6% |
| Accurate Solo 1000² | <<locked>> | 60% | 30,705 psi | 68% | 1437 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 28,253 psi | 63% | 1457 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 24,700 psi | 55% | 1568 fps | 87.1% |
| ADI AP 100² | <<locked>> | 60% | 20,088 psi | 45% | 1407 fps | 96.2% |
| ADI APS 350² | <<locked>> | 60% | 31,038 psi | 69% | 1332 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 30,110 psi | 67% | 1352 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 30,516 psi | 68% | 1394 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 33,620 psi | 75% | 1493 fps | 100% |
| Alliant 2400*² | <<locked>> | 72% | 28,311 psi | 63% | 1677 fps | 85.1% |
| Alliant BE-86² | <<locked>> | 60% | 29,399 psi | 65% | 1457 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 19,479 psi | 43% | 1417 fps | 85.6% |
| Alliant BULLSEYE² | <<locked>> | 60% | 35,752 psi | 80% | 1660 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 31,038 psi | 69% | 1453 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 21,944 psi | 49% | 1394 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 28,964 psi | 64% | 1663 fps | 99.1% |
| Alliant RED DOT² | <<locked>> | 60% | 29,762 psi | 66% | 1401 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 29,544 psi | 66% | 1555 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 30,501 psi | 68% | 1434 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 20,943 psi | 47% | 1270 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 33,794 psi | 75% | 1499 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,570 psi | 57% | 1273 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 84% | 28,645 psi | 64% | 1765 fps | 85.9% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 11,458 psi | 25% | 961 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 33,402 psi | 74% | 1549 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 32,198 psi | 72% | 1745 fps | 95.4% |
| Lovex D037.2*² | <<locked>> | 60% | 25,324 psi | 56% | 1588 fps | 86.1% |
| Lovex S020² | <<locked>> | 60% | 34,200 psi | 76% | 1588 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 26,600 psi | 59% | 1417 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 30,255 psi | 67% | 1470 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 29,733 psi | 66% | 1447 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 31,212 psi | 69% | 1450 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 33,982 psi | 76% | 1440 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 72% | 27,514 psi | 61% | 1670 fps | 85.9% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 11,052 psi | 25% | 974 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 28,297 psi | 63% | 1522 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 27,021 psi | 60% | 1621 fps | 94.9% |
| Rottweil P 806² | <<locked>> | 60% | 25,483 psi | 57% | 1581 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 25,324 psi | 56% | 1588 fps | 86.1% |
| Shooters World Major Pistol² | <<locked>> | 60% | 32,198 psi | 72% | 1745 fps | 95.4% |
| SNPE Vectan A0² | <<locked>> | 60% | 26,643 psi | 59% | 1463 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 31,589 psi | 70% | 1493 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 30,893 psi | 69% | 1506 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 33,344 psi | 74% | 1404 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 96% | 25,860 psi | 58% | 1621 fps | 87.2% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 23,859 psi | 53% | 1467 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 31,154 psi | 69% | 1509 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 33,663 psi | 75% | 1749 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 33,083 psi | 74% | 1611 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 29,718 psi | 66% | 1526 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 28,326 psi | 63% | 1578 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 19,870 psi | 44% | 1424 fps | 90.9% |
| Vihtavuori N105*² | <<locked>> | 60% | 17,506 psi | 39% | 1407 fps | 92.8% |
| Vihtavuori N110* | <<locked>> | 92% | 28,442 psi | 63% | 1709 fps | 85.9% |
| Vihtavuori N320² | <<locked>> | 60% | 33,794 psi | 75% | 1490 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 18,449 psi | 41% | 1132 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 33,794 psi | 75% | 1552 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 29,530 psi | 66% | 1526 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 24,540 psi | 55% | 1496 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 28,137 psi | 63% | 1467 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 62 powders for .357 Maximum loaded with the .355 | 124gr | X-TREME FP. Hodgdon LilGun delivers the highest muzzle velocity at 1,949 fps; across all powders the maximum-charge window runs from 1,250 fps to 1,949 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 15 of the 62 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, SNPE Vectan BA6 1/2 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. 9, Accurate TCM, Alliant 2400 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.