Load Specifications
Load data in caliber .357 Maximum with .356 | 145gr | H&N KS HS bullet and 65 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant BLUE DOT, Vihtavuori N105 and ADI AP 100.
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>> | 88% | 39,682 psi | 88% | 1752 fps | 90.5% |
| Accurate No. 2² | <<locked>> | 68% | 39,320 psi | 87% | 1539 fps | 100% |
| Accurate No. 7² | <<locked>> | 68% | 40,335 psi | 90% | 1752 fps | 99% |
| Accurate No. 9² | <<locked>> | 76% | 40,582 psi | 90% | 1755 fps | 95.9% |
| Accurate Solo 1000² | <<locked>> | 72% | 40,582 psi | 90% | 1444 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 37,391 psi | 83% | 1460 fps | 100% |
| Accurate TCM² | <<locked>> | 76% | 40,683 psi | 90% | 1752 fps | 96.8% |
| ADI AP 100 | <<locked>> | 88% | 40,451 psi | 90% | 1673 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 39,566 psi | 88% | 1329 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 38,957 psi | 87% | 1352 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 38,914 psi | 87% | 1394 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 39,291 psi | 87% | 1444 fps | 100% |
| Alliant 2400* | <<locked>> | 84% | 38,392 psi | 85% | 1749 fps | 92.9% |
| Alliant BE-86² | <<locked>> | 72% | 39,030 psi | 87% | 1467 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 88% | 39,740 psi | 88% | 1739 fps | 98.4% |
| Alliant BULLSEYE² | <<locked>> | 64% | 38,841 psi | 86% | 1562 fps | 100% |
| Alliant Green Dot² | <<locked>> | 72% | 40,596 psi | 90% | 1453 fps | 100% |
| Alliant Herco | <<locked>> | 88% | 40,408 psi | 90% | 1581 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 72% | 40,132 psi | 89% | 1722 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 92% | 40,059 psi | 89% | 1801 fps | 88.1% |
| Alliant RED DOT² | <<locked>> | 72% | 37,884 psi | 84% | 1401 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 38,551 psi | 86% | 1562 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 72% | 40,190 psi | 89% | 1437 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 88% | 38,972 psi | 87% | 1430 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 36,419 psi | 81% | 1411 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 38,682 psi | 86% | 1345 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 96% | 40,683 psi | 90% | 1860 fps | 94.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 20,653 psi | 46% | 1119 fps | 100% |
| Hodgdon Universal² | <<locked>> | 68% | 39,334 psi | 87% | 1503 fps | 100% |
| Lovex D037.1² | <<locked>> | 68% | 40,335 psi | 90% | 1752 fps | 99% |
| Lovex D037.2*² | <<locked>> | 72% | 36,289 psi | 81% | 1690 fps | 94.4% |
| Lovex S020² | <<locked>> | 64% | 36,695 psi | 82% | 1490 fps | 100% |
| Maxam CSB 1² | <<locked>> | 76% | 38,450 psi | 86% | 1467 fps | 100% |
| Maxam CSB 2² | <<locked>> | 72% | 38,566 psi | 86% | 1467 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 38,290 psi | 85% | 1444 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 36,912 psi | 82% | 1404 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 39,407 psi | 88% | 1385 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 84% | 38,232 psi | 85% | 1755 fps | 93.9% |
| ReloadSwiss RS 12² | <<locked>> | 64% | 40,205 psi | 89% | 1467 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 19,247 psi | 43% | 1135 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 37,797 psi | 84% | 1532 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 37,608 psi | 84% | 1696 fps | 99.4% |
| Rottweil P 806² | <<locked>> | 76% | 39,030 psi | 87% | 1683 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 72% | 36,289 psi | 81% | 1690 fps | 94.4% |
| Shooters World Major Pistol² | <<locked>> | 68% | 40,335 psi | 90% | 1752 fps | 99% |
| SNPE Vectan A0² | <<locked>> | 76% | 39,088 psi | 87% | 1522 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 38,058 psi | 85% | 1453 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 37,478 psi | 83% | 1467 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 39,610 psi | 88% | 1362 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 26,484 psi | 59% | 1532 fps | 90.2% |
| SNPE Vectan BA7 1/2 | <<locked>> | 80% | 39,595 psi | 88% | 1601 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 37,246 psi | 83% | 1470 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 35,984 psi | 80% | 1654 fps | 100% |
| Somchem MP200² | <<locked>> | 68% | 39,697 psi | 88% | 1568 fps | 100% |
| Somchem MS200² | <<locked>> | 72% | 39,320 psi | 87% | 1535 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 72% | 38,551 psi | 86% | 1604 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 84% | 37,869 psi | 84% | 1683 fps | 99.7% |
| Vihtavuori N105 | <<locked>> | 88% | 39,030 psi | 87% | 1729 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 33,765 psi | 75% | 1693 fps | 91.5% |
| Vihtavuori N320² | <<locked>> | 68% | 40,016 psi | 89% | 1444 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 38,247 psi | 85% | 1342 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 36,782 psi | 82% | 1463 fps | 100% |
| Vihtavuori N340² | <<locked>> | 72% | 40,161 psi | 89% | 1545 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 37,217 psi | 83% | 1581 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 36,883 psi | 82% | 1473 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% | 29,950 psi | 67% | 1588 fps | 85.4% |
| Accurate No. 2² | <<locked>> | 60% | 30,327 psi | 67% | 1421 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 29,544 psi | 66% | 1575 fps | 96% |
| Accurate No. 9*² | <<locked>> | 60% | 22,321 psi | 50% | 1414 fps | 86.1% |
| Accurate Solo 1000² | <<locked>> | 60% | 29,646 psi | 66% | 1296 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 26,992 psi | 60% | 1316 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 22,640 psi | 50% | 1417 fps | 87.8% |
| ADI AP 100² | 10.1 gr | 60% | 18,101 psi | 40% | 1257 fps | 96.4% |
| ADI APS 350² | <<locked>> | 60% | 30,284 psi | 67% | 1204 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 29,689 psi | 66% | 1230 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 29,225 psi | 65% | 1263 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 32,140 psi | 71% | 1348 fps | 100% |
| Alliant 2400*² | <<locked>> | 72% | 25,715 psi | 57% | 1509 fps | 85.7% |
| Alliant BE-86² | <<locked>> | 60% | 27,383 psi | 61% | 1309 fps | 100% |
| Alliant BLUE DOT*² | 12 gr | 60% | 17,056 psi | 38% | 1260 fps | 85.3% |
| Alliant BULLSEYE² | <<locked>> | 60% | 34,258 psi | 76% | 1499 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 30,501 psi | 68% | 1319 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 19,566 psi | 44% | 1243 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 27,137 psi | 60% | 1503 fps | 99.5% |
| Alliant Power Pro 300-MP* | <<locked>> | 88% | 34,824 psi | 77% | 1716 fps | 85.5% |
| Alliant RED DOT² | <<locked>> | 60% | 28,166 psi | 63% | 1263 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 27,470 psi | 61% | 1398 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 29,298 psi | 65% | 1299 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 18,942 psi | 42% | 1138 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 32,430 psi | 72% | 1358 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 24,642 psi | 55% | 1148 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 84% | 25,860 psi | 58% | 1591 fps | 86.5% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,876 psi | 20% | 833 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 31,227 psi | 69% | 1394 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 29,544 psi | 66% | 1575 fps | 96% |
| Lovex D037.2*² | <<locked>> | 60% | 22,669 psi | 50% | 1424 fps | 86.4% |
| Lovex S020² | <<locked>> | 60% | 32,169 psi | 72% | 1427 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 25,179 psi | 56% | 1283 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 27,572 psi | 61% | 1316 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 28,471 psi | 63% | 1309 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 29,965 psi | 67% | 1309 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 32,706 psi | 73% | 1299 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 72% | 24,685 psi | 55% | 1499 fps | 86.3% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 35,563 psi | 79% | 1411 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 8,195 psi | 18% | 837 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 26,179 psi | 58% | 1368 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 25,121 psi | 56% | 1467 fps | 95.6% |
| Rottweil P 806² | <<locked>> | 60% | 21,712 psi | 48% | 1398 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 22,669 psi | 50% | 1424 fps | 86.4% |
| Shooters World Major Pistol² | <<locked>> | 60% | 29,544 psi | 66% | 1575 fps | 96% |
| SNPE Vectan A0² | <<locked>> | 60% | 25,295 psi | 56% | 1322 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 30,748 psi | 68% | 1355 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 30,095 psi | 67% | 1368 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 32,663 psi | 73% | 1270 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 92% | 21,132 psi | 47% | 1404 fps | 85.6% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 22,118 psi | 49% | 1322 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 29,573 psi | 66% | 1365 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 31,531 psi | 70% | 1585 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 31,430 psi | 70% | 1457 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 28,195 psi | 63% | 1381 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 26,252 psi | 58% | 1417 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 17,405 psi | 39% | 1266 fps | 90.7% |
| Vihtavuori N105*² | 11.5 gr | 60% | 14,707 psi | 33% | 1237 fps | 91.9% |
| Vihtavuori N110* | <<locked>> | 92% | 25,976 psi | 58% | 1545 fps | 86.7% |
| Vihtavuori N320² | <<locked>> | 60% | 32,460 psi | 72% | 1348 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 15,940 psi | 35% | 1004 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 32,285 psi | 72% | 1404 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 27,978 psi | 62% | 1381 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 22,582 psi | 50% | 1345 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 26,049 psi | 58% | 1319 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 65 powders for .357 Maximum loaded with the .356 | 145gr | H&N KS HS. Hodgdon LilGun delivers the highest muzzle velocity at 1,860 fps; across all powders the maximum-charge window runs from 1,119 fps to 1,860 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 18 of the 65 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 43–90 %, 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. Alliant BLUE DOT, Vihtavuori N105, ADI AP 100 rank at the top here: for .357 Maximum with the .356 | 145gr | H&N KS HS they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4100, Alliant 2400, Alliant Power Pro 300-MP 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.