Load Specifications
Load data in caliber .357 Maximum with .355 | 135gr | X-TREME RP 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 Baschieri & Pellagri 102 Pistol, Vihtavuori N32C Tin Star and ReloadSwiss RS 14.
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 4100* | <<locked>> | 84% | 37,695 psi | 84% | 1772 fps | 88.5% |
| Accurate No. 2² | <<locked>> | 64% | 36,230 psi | 81% | 1555 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 38,043 psi | 85% | 1768 fps | 98.1% |
| Accurate No. 9*² | <<locked>> | 72% | 37,956 psi | 84% | 1765 fps | 94.2% |
| Accurate Solo 1000² | <<locked>> | 68% | 37,710 psi | 84% | 1460 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 39,465 psi | 88% | 1539 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 38,029 psi | 85% | 1762 fps | 95.3% |
| ADI AP 100 | <<locked>> | 84% | 38,522 psi | 86% | 1703 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 40,480 psi | 90% | 1391 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 39,740 psi | 88% | 1414 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 40,625 psi | 90% | 1460 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 37,275 psi | 83% | 1463 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 36,970 psi | 82% | 1772 fps | 91.3% |
| Alliant BE-86² | <<locked>> | 68% | 37,057 psi | 82% | 1490 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 38,435 psi | 85% | 1768 fps | 97.5% |
| Alliant BULLSEYE² | <<locked>> | 64% | 39,958 psi | 89% | 1631 fps | 100% |
| Alliant Green Dot² | <<locked>> | 68% | 38,014 psi | 85% | 1476 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 39,378 psi | 88% | 1617 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 37,362 psi | 83% | 1736 fps | 100% |
| Alliant RED DOT² | <<locked>> | 72% | 39,798 psi | 89% | 1473 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 40,480 psi | 90% | 1637 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 38,290 psi | 85% | 1463 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 38,072 psi | 85% | 1470 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 38,711 psi | 86% | 1483 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 39,523 psi | 88% | 1407 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 92% | 38,638 psi | 86% | 1883 fps | 92.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 23,177 psi | 52% | 1188 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 37,811 psi | 84% | 1529 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 38,043 psi | 85% | 1768 fps | 98.1% |
| Lovex D037.2*² | <<locked>> | 72% | 38,957 psi | 87% | 1781 fps | 94.6% |
| Lovex S020² | <<locked>> | 64% | 39,247 psi | 87% | 1572 fps | 100% |
| Maxam CSB 1² | <<locked>> | 76% | 40,379 psi | 90% | 1545 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 37,869 psi | 84% | 1499 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 40,321 psi | 90% | 1519 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 38,319 psi | 85% | 1470 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 37,492 psi | 83% | 1411 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 80% | 36,782 psi | 82% | 1778 fps | 92.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 22,321 psi | 50% | 1211 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 39,871 psi | 89% | 1611 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 39,798 psi | 89% | 1781 fps | 99.4% |
| Rottweil P 806² | <<locked>> | 72% | 38,537 psi | 86% | 1726 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 72% | 38,957 psi | 87% | 1781 fps | 94.6% |
| Shooters World Major Pistol² | <<locked>> | 64% | 38,043 psi | 85% | 1768 fps | 98.1% |
| SNPE Vectan A0² | <<locked>> | 76% | 40,596 psi | 90% | 1594 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 39,537 psi | 88% | 1526 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 38,972 psi | 87% | 1539 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 40,335 psi | 90% | 1424 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 29,443 psi | 65% | 1631 fps | 91% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 37,347 psi | 83% | 1627 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 38,769 psi | 86% | 1539 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 39,465 psi | 88% | 1755 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 37,623 psi | 84% | 1594 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 37,159 psi | 83% | 1558 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 68% | 36,608 psi | 81% | 1631 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 80% | 36,622 psi | 81% | 1713 fps | 99.3% |
| Vihtavuori N105 | <<locked>> | 84% | 37,724 psi | 84% | 1765 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 37,028 psi | 82% | 1798 fps | 92% |
| Vihtavuori N320² | <<locked>> | 64% | 38,363 psi | 85% | 1470 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 40,103 psi | 89% | 1404 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 38,595 psi | 86% | 1535 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 37,782 psi | 84% | 1568 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 39,697 psi | 88% | 1667 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 39,030 psi | 87% | 1549 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4100* | <<locked>> | 80% | 33,301 psi | 74% | 1690 fps | 86.2% |
| Accurate No. 2² | <<locked>> | 60% | 32,416 psi | 72% | 1499 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 32,924 psi | 73% | 1680 fps | 96.6% |
| Accurate No. 9*² | <<locked>> | 60% | 25,179 psi | 56% | 1512 fps | 87.3% |
| Accurate Solo 1000² | <<locked>> | 60% | 31,111 psi | 69% | 1365 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 28,950 psi | 64% | 1388 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 25,440 psi | 57% | 1516 fps | 88.9% |
| ADI AP 100² | <<locked>> | 60% | 20,508 psi | 46% | 1348 fps | 97.2% |
| ADI APS 350² | <<locked>> | 60% | 31,604 psi | 70% | 1270 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 30,327 psi | 67% | 1283 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 30,734 psi | 68% | 1322 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 33,634 psi | 75% | 1414 fps | 100% |
| Alliant 2400*² | <<locked>> | 72% | 29,109 psi | 65% | 1621 fps | 87% |
| Alliant BE-86² | <<locked>> | 60% | 29,878 psi | 66% | 1388 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 19,856 psi | 44% | 1365 fps | 87.3% |
| Alliant BULLSEYE² | <<locked>> | 60% | 36,245 psi | 81% | 1578 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 31,502 psi | 70% | 1385 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 22,220 psi | 49% | 1325 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 29,515 psi | 66% | 1591 fps | 99.6% |
| Alliant RED DOT² | <<locked>> | 60% | 30,487 psi | 68% | 1339 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 29,921 psi | 67% | 1480 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 31,169 psi | 69% | 1368 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | 8.9 gr | 60% | 21,379 psi | 48% | 1211 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 34,432 psi | 77% | 1427 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 26,107 psi | 58% | 1211 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 84% | 29,312 psi | 65% | 1706 fps | 87.8% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 11,487 psi | 26% | 909 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 33,765 psi | 75% | 1470 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 32,924 psi | 73% | 1680 fps | 96.6% |
| Lovex D037.2*² | <<locked>> | 60% | 25,875 psi | 58% | 1529 fps | 87.8% |
| Lovex S020² | <<locked>> | 60% | 34,853 psi | 78% | 1512 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 27,209 psi | 61% | 1352 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 30,501 psi | 68% | 1394 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 29,776 psi | 66% | 1371 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 31,720 psi | 71% | 1381 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 33,750 psi | 75% | 1358 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 68% | 24,787 psi | 55% | 1532 fps | 85.1% |
| ReloadSwiss RS 14² | 5.2 gr | 60% | 11,110 psi | 25% | 922 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 28,790 psi | 64% | 1450 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 27,470 psi | 61% | 1555 fps | 96% |
| Rottweil P 806² | <<locked>> | 60% | 26,194 psi | 58% | 1519 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 25,875 psi | 58% | 1529 fps | 87.8% |
| Shooters World Major Pistol² | <<locked>> | 60% | 32,924 psi | 73% | 1680 fps | 96.6% |
| SNPE Vectan A0² | <<locked>> | 60% | 26,934 psi | 60% | 1391 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 32,039 psi | 71% | 1421 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 31,444 psi | 70% | 1434 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 33,692 psi | 75% | 1335 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 92% | 23,946 psi | 53% | 1506 fps | 87% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 24,076 psi | 54% | 1398 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 31,488 psi | 70% | 1434 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 34,635 psi | 77% | 1677 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 33,837 psi | 75% | 1539 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 30,110 psi | 67% | 1453 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 28,805 psi | 64% | 1506 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 20,291 psi | 45% | 1371 fps | 92.4% |
| Vihtavuori N105*² | <<locked>> | 60% | 17,956 psi | 40% | 1355 fps | 94.4% |
| Vihtavuori N110* | <<locked>> | 88% | 26,194 psi | 58% | 1585 fps | 85.6% |
| Vihtavuori N320² | <<locked>> | 60% | 34,548 psi | 77% | 1421 fps | 100% |
| Vihtavuori N32C Tin Star² | 6.9 gr | 60% | 18,449 psi | 41% | 1070 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 34,345 psi | 76% | 1476 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 29,965 psi | 67% | 1453 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 25,150 psi | 56% | 1434 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 28,689 psi | 64% | 1398 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 Maximum loaded with the .355 | 135gr | X-TREME RP HP. Hodgdon LilGun delivers the highest muzzle velocity at 1,883 fps; across all powders the maximum-charge window runs from 1,188 fps to 1,883 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 16 of the 63 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 50–90 %, 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. Baschieri & Pellagri 102 Pistol, Vihtavuori N32C Tin Star, ReloadSwiss RS 14 rank at the top here: for .357 Maximum with the .355 | 135gr | X-TREME RP HP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4100, Accurate No. 9, Alliant 2400 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.