Load Specifications
Load data in caliber .357 Maximum with .357 | 180gr | 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 Vihtavuori N32C Tin Star, ReloadSwiss RS 14 and Hodgdon TrailBoss.
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% | 39,363 psi | 88% | 1552 fps | 93.3% |
| Accurate No. 2² | <<locked>> | 64% | 38,058 psi | 85% | 1319 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 39,146 psi | 87% | 1522 fps | 99.8% |
| Accurate No. 9² | <<locked>> | 72% | 39,987 psi | 89% | 1542 fps | 97.8% |
| Accurate Solo 1000² | <<locked>> | 68% | 38,667 psi | 86% | 1227 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 40,480 psi | 90% | 1296 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 39,595 psi | 88% | 1529 fps | 98.4% |
| ADI AP 100 | <<locked>> | 84% | 39,871 psi | 89% | 1453 fps | 100% |
| ADI APS 350² | <<locked>> | 68% | 38,072 psi | 85% | 1135 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 40,480 psi | 90% | 1188 fps | 100% |
| ADI AS 30² | <<locked>> | 68% | 38,130 psi | 85% | 1194 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 37,869 psi | 84% | 1230 fps | 100% |
| Alliant 2400 | <<locked>> | 80% | 38,682 psi | 86% | 1549 fps | 95.5% |
| Alliant BE-86² | <<locked>> | 68% | 37,942 psi | 84% | 1257 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 39,856 psi | 89% | 1529 fps | 99.6% |
| Alliant Green Dot² | <<locked>> | 68% | 38,812 psi | 86% | 1243 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 40,205 psi | 89% | 1368 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 39,030 psi | 87% | 1486 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 88% | 40,451 psi | 90% | 1604 fps | 91.4% |
| Alliant RED DOT² | <<locked>> | 72% | 40,030 psi | 89% | 1230 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 68% | 37,884 psi | 84% | 1342 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 39,247 psi | 87% | 1230 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 38,754 psi | 86% | 1237 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 39,421 psi | 88% | 1253 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 39,682 psi | 88% | 1178 fps | 100% |
| Hodgdon H110* | <<locked>> | 84% | 36,753 psi | 82% | 1555 fps | 89% |
| Hodgdon LilGun | <<locked>> | 88% | 35,781 psi | 80% | 1585 fps | 95.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 22,974 psi | 51% | 994 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 38,609 psi | 86% | 1289 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 39,146 psi | 87% | 1522 fps | 99.8% |
| Lovex D037.2² | <<locked>> | 72% | 40,553 psi | 90% | 1549 fps | 97.9% |
| Lovex S020² | <<locked>> | 64% | 39,798 psi | 89% | 1319 fps | 100% |
| Maxam CSB 1² | <<locked>> | 72% | 37,579 psi | 84% | 1260 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 38,014 psi | 85% | 1257 fps | 100% |
| Maxam CSB 3² | <<locked>> | 68% | 37,173 psi | 83% | 1234 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 39,421 psi | 88% | 1240 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 38,290 psi | 85% | 1184 fps | 100% |
| Ramshot Enforcer | <<locked>> | 80% | 38,014 psi | 85% | 1549 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 22,031 psi | 49% | 1014 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 68% | 37,362 psi | 83% | 1319 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 68% | 37,043 psi | 82% | 1476 fps | 100% |
| ReloadSwiss RS 30*ᴾ | <<locked>> | 100% | 31,952 psi | 71% | 1493 fps | 89.7% |
| Rottweil P 806² | <<locked>> | 72% | 39,363 psi | 88% | 1470 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 40,553 psi | 90% | 1549 fps | 97.9% |
| Shooters World Major Pistol² | <<locked>> | 64% | 39,146 psi | 87% | 1522 fps | 99.8% |
| SNPE Vectan A0² | <<locked>> | 72% | 38,319 psi | 85% | 1306 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 64% | 36,782 psi | 82% | 1243 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 40,292 psi | 90% | 1299 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 64% | 37,579 psi | 84% | 1158 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 30,429 psi | 68% | 1424 fps | 95.5% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 38,609 psi | 86% | 1381 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 39,842 psi | 89% | 1296 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 38,812 psi | 86% | 1348 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 38,334 psi | 85% | 1319 fps | 100% |
| Somchem S265* | <<locked>> | 96% | 37,681 psi | 84% | 1499 fps | 88.1% |
| Vihtavuori 3N37² | <<locked>> | 68% | 37,318 psi | 83% | 1378 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 80% | 37,768 psi | 84% | 1470 fps | 100% |
| Vihtavuori N105 | <<locked>> | 84% | 39,740 psi | 88% | 1516 fps | 100% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 38,972 psi | 87% | 1575 fps | 96.3% |
| Vihtavuori N320² | <<locked>> | 64% | 38,624 psi | 86% | 1230 fps | 100% |
| Vihtavuori N32C Tin Star | <<locked>> | 96% | 38,247 psi | 85% | 1158 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 39,581 psi | 88% | 1293 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 38,740 psi | 86% | 1322 fps | 100% |
| Vihtavuori N350² | <<locked>> | 72% | 36,811 psi | 82% | 1365 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 40,074 psi | 89% | 1309 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*² | <<locked>> | 72% | 26,208 psi | 58% | 1339 fps | 86.5% |
| Accurate No. 2² | <<locked>> | 60% | 33,417 psi | 74% | 1266 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 33,982 psi | 76% | 1450 fps | 99.1% |
| Accurate No. 9*² | <<locked>> | 60% | 25,947 psi | 58% | 1319 fps | 92.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 31,575 psi | 70% | 1145 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 29,254 psi | 65% | 1165 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 26,005 psi | 58% | 1316 fps | 93.4% |
| ADI AP 100² | <<locked>> | 60% | 20,494 psi | 46% | 1152 fps | 99.3% |
| ADI APS 350² | <<locked>> | 60% | 31,502 psi | 70% | 1056 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 30,792 psi | 68% | 1076 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 30,995 psi | 69% | 1109 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 34,272 psi | 76% | 1188 fps | 100% |
| Alliant 2400*² | <<locked>> | 64% | 22,814 psi | 51% | 1273 fps | 87% |
| Alliant BE-86² | <<locked>> | 60% | 30,530 psi | 68% | 1171 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 19,783 psi | 44% | 1175 fps | 91.6% |
| Alliant Green Dot² | <<locked>> | 60% | 31,807 psi | 71% | 1161 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 22,220 psi | 49% | 1119 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 30,501 psi | 68% | 1365 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 80% | 30,647 psi | 68% | 1453 fps | 86.6% |
| Alliant RED DOT² | <<locked>> | 60% | 30,487 psi | 68% | 1119 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 30,081 psi | 67% | 1243 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 31,459 psi | 70% | 1145 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 21,466 psi | 48% | 1020 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 34,896 psi | 78% | 1204 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,976 psi | 58% | 1010 fps | 100% |
| Hodgdon H110* | <<locked>> | 80% | 31,720 psi | 71% | 1473 fps | 86.3% |
| Hodgdon LilGun*² | <<locked>> | 76% | 22,858 psi | 51% | 1352 fps | 87.9% |
| Hodgdon TrailBoss² | 4.5 gr | 60% | 10,936 psi | 24% | 758 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 34,447 psi | 77% | 1240 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 33,982 psi | 76% | 1450 fps | 99.1% |
| Lovex D037.2*² | <<locked>> | 60% | 26,339 psi | 59% | 1325 fps | 92.4% |
| Lovex S020² | <<locked>> | 60% | 35,375 psi | 79% | 1270 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 27,354 psi | 61% | 1132 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 31,183 psi | 69% | 1178 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 30,385 psi | 68% | 1152 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 32,300 psi | 72% | 1158 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 34,563 psi | 77% | 1142 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 64% | 21,669 psi | 48% | 1260 fps | 87.4% |
| ReloadSwiss RS 14² | 4.5 gr | 60% | 10,138 psi | 23% | 761 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 29,544 psi | 66% | 1224 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 28,355 psi | 63% | 1345 fps | 98.8% |
| ReloadSwiss RS 30* | <<locked>> | 96% | 28,877 psi | 64% | 1437 fps | 87.6% |
| Rottweil P 806² | <<locked>> | 60% | 25,875 psi | 58% | 1289 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 26,339 psi | 59% | 1325 fps | 92.4% |
| Shooters World Major Pistol² | <<locked>> | 60% | 33,982 psi | 76% | 1450 fps | 99.1% |
| SNPE Vectan A0² | <<locked>> | 60% | 27,789 psi | 62% | 1178 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 33,025 psi | 73% | 1201 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 32,474 psi | 72% | 1214 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 34,142 psi | 76% | 1119 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 80% | 17,637 psi | 39% | 1158 fps | 85.7% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 24,526 psi | 55% | 1188 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 32,401 psi | 72% | 1211 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 34,229 psi | 76% | 1293 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 31,140 psi | 69% | 1230 fps | 100% |
| Somchem S265* | <<locked>> | 92% | 33,750 psi | 75% | 1440 fps | 86.2% |
| Vihtavuori 3N37² | <<locked>> | 60% | 29,559 psi | 66% | 1280 fps | 100% |
| Vihtavuori 3N38² | <<locked>> | 60% | 20,479 psi | 46% | 1181 fps | 96.1% |
| Vihtavuori N105² | <<locked>> | 60% | 18,144 psi | 40% | 1168 fps | 97.8% |
| Vihtavuori N110* | <<locked>> | 80% | 20,943 psi | 47% | 1263 fps | 86.2% |
| Vihtavuori N320² | <<locked>> | 60% | 34,824 psi | 77% | 1188 fps | 100% |
| Vihtavuori N32C Tin Star² | 6 gr | 60% | 17,927 psi | 40% | 892 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 35,157 psi | 78% | 1243 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 30,632 psi | 68% | 1227 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 25,628 psi | 57% | 1214 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 28,848 psi | 64% | 1175 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 .357 | 180gr | H&N KS HS. Alliant Power Pro 300-MP delivers the highest muzzle velocity at 1,604 fps; across all powders the maximum-charge window runs from 994 fps to 1,604 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 20 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 49–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, ReloadSwiss RS 30 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 N32C Tin Star, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for .357 Maximum with the .357 | 180gr | 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 Power Pro 300-MP, Hodgdon H110 burn incompletely and react more sensitively to barrel length and temperature. ADI APS 350, ADI APS 450, ADI AS 30 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.