Load Specifications
Load data in caliber .357 Maximum with .355 | 154gr | Geco FMJ FLAT NOSE bullet and 65 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% | 37,072 psi | 82% | 1650 fps | 90.1% |
| Accurate No. 2² | <<locked>> | 64% | 36,027 psi | 80% | 1434 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 37,014 psi | 82% | 1634 fps | 98.7% |
| Accurate No. 9² | <<locked>> | 72% | 37,724 psi | 84% | 1650 fps | 95.6% |
| Accurate Solo 1000² | <<locked>> | 68% | 37,695 psi | 84% | 1345 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 39,247 psi | 87% | 1417 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 37,608 psi | 84% | 1640 fps | 96.5% |
| ADI AP 100 | <<locked>> | 84% | 37,985 psi | 84% | 1575 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 40,176 psi | 89% | 1280 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 39,798 psi | 89% | 1306 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 40,292 psi | 90% | 1345 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 36,854 psi | 82% | 1348 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 35,897 psi | 80% | 1644 fps | 92.5% |
| Alliant BE-86² | <<locked>> | 68% | 36,361 psi | 81% | 1371 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 37,956 psi | 84% | 1647 fps | 98.4% |
| Alliant BULLSEYE² | <<locked>> | 64% | 39,842 psi | 89% | 1506 fps | 100% |
| Alliant Green Dot² | <<locked>> | 68% | 37,710 psi | 84% | 1362 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 39,073 psi | 87% | 1496 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 37,507 psi | 83% | 1614 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 88% | 37,695 psi | 84% | 1699 fps | 87.8% |
| Alliant RED DOT² | <<locked>> | 72% | 39,247 psi | 87% | 1355 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 40,321 psi | 90% | 1516 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 37,753 psi | 84% | 1345 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 37,637 psi | 84% | 1355 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 38,290 psi | 85% | 1368 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 38,769 psi | 86% | 1424 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 38,943 psi | 87% | 1293 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 92% | 37,869 psi | 84% | 1755 fps | 94.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 22,510 psi | 50% | 1093 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 36,941 psi | 82% | 1404 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 37,014 psi | 82% | 1634 fps | 98.7% |
| Lovex D037.2² | <<locked>> | 72% | 38,203 psi | 85% | 1657 fps | 95.7% |
| Lovex S020² | <<locked>> | 64% | 38,261 psi | 85% | 1440 fps | 100% |
| Maxam CSB 1² | <<locked>> | 76% | 39,697 psi | 88% | 1417 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 36,927 psi | 82% | 1378 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 39,900 psi | 89% | 1398 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 38,247 psi | 85% | 1358 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 40,553 psi | 90% | 1339 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 80% | 35,621 psi | 79% | 1650 fps | 93.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 20,987 psi | 47% | 1106 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 39,508 psi | 88% | 1486 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 39,784 psi | 88% | 1660 fps | 99.8% |
| Rottweil P 806² | <<locked>> | 72% | 36,912 psi | 82% | 1588 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 38,203 psi | 85% | 1657 fps | 95.7% |
| Shooters World Major Pistol² | <<locked>> | 64% | 37,014 psi | 82% | 1634 fps | 98.7% |
| SNPE Vectan A0² | <<locked>> | 76% | 40,509 psi | 90% | 1473 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 39,218 psi | 87% | 1404 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 38,682 psi | 86% | 1421 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 40,451 psi | 90% | 1312 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 28,500 psi | 63% | 1512 fps | 92.3% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 37,101 psi | 83% | 1506 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 38,508 psi | 86% | 1421 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 38,783 psi | 86% | 1621 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 37,043 psi | 82% | 1467 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 36,927 psi | 82% | 1440 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 72% | 40,234 psi | 89% | 1558 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 84% | 40,321 psi | 90% | 1647 fps | 100% |
| Vihtavuori N105 | <<locked>> | 84% | 36,956 psi | 82% | 1634 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 35,955 psi | 80% | 1667 fps | 93.3% |
| Vihtavuori N320² | <<locked>> | 64% | 37,391 psi | 83% | 1348 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 39,711 psi | 88% | 1296 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 38,189 psi | 85% | 1414 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 37,086 psi | 82% | 1444 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 39,334 psi | 87% | 1539 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 38,638 psi | 86% | 1430 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>> | 76% | 28,007 psi | 62% | 1493 fps | 85.1% |
| Accurate No. 2² | <<locked>> | 60% | 31,879 psi | 71% | 1381 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 31,923 psi | 71% | 1552 fps | 97.4% |
| Accurate No. 9*² | <<locked>> | 60% | 24,018 psi | 53% | 1398 fps | 88.4% |
| Accurate Solo 1000² | <<locked>> | 60% | 31,154 psi | 69% | 1260 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 28,355 psi | 63% | 1276 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 24,236 psi | 54% | 1394 fps | 89.9% |
| ADI AP 100² | <<locked>> | 60% | 19,682 psi | 44% | 1243 fps | 97.9% |
| ADI APS 350² | <<locked>> | 60% | 31,241 psi | 69% | 1165 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 30,211 psi | 67% | 1184 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 30,255 psi | 67% | 1217 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 33,547 psi | 75% | 1306 fps | 100% |
| Alliant 2400*² | <<locked>> | 68% | 24,352 psi | 54% | 1421 fps | 85.5% |
| Alliant BE-86² | <<locked>> | 60% | 29,095 psi | 65% | 1276 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 18,492 psi | 41% | 1247 fps | 87.9% |
| Alliant BULLSEYE² | <<locked>> | 60% | 35,781 psi | 80% | 1453 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 30,676 psi | 68% | 1270 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 21,292 psi | 47% | 1220 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 29,298 psi | 65% | 1480 fps | 99.9% |
| Alliant Power Pro 300-MP* | <<locked>> | 84% | 32,851 psi | 73% | 1617 fps | 85.2% |
| Alliant RED DOT² | <<locked>> | 60% | 29,820 psi | 66% | 1230 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 28,790 psi | 64% | 1355 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 30,647 psi | 68% | 1257 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | 8.3 gr | 60% | 20,392 psi | 45% | 1109 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 33,591 psi | 75% | 1316 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 31,111 psi | 69% | 1325 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,657 psi | 57% | 1112 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 80% | 24,250 psi | 54% | 1499 fps | 86.2% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 10,443 psi | 23% | 827 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 33,170 psi | 74% | 1355 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 31,923 psi | 71% | 1552 fps | 97.4% |
| Lovex D037.2*² | <<locked>> | 60% | 24,743 psi | 55% | 1411 fps | 88.9% |
| Lovex S020² | <<locked>> | 60% | 34,185 psi | 76% | 1391 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 26,542 psi | 59% | 1243 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 29,472 psi | 66% | 1280 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 29,675 psi | 66% | 1266 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 31,053 psi | 69% | 1266 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 33,591 psi | 75% | 1253 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 68% | 23,395 psi | 52% | 1414 fps | 86.2% |
| ReloadSwiss RS 14² | 4.9 gr | 60% | 9,921 psi | 22% | 837 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 27,978 psi | 62% | 1332 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 26,658 psi | 59% | 1437 fps | 96.9% |
| Rottweil P 806² | <<locked>> | 60% | 24,439 psi | 54% | 1394 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 24,743 psi | 55% | 1411 fps | 88.9% |
| Shooters World Major Pistol² | <<locked>> | 60% | 31,923 psi | 71% | 1552 fps | 97.4% |
| SNPE Vectan A0² | <<locked>> | 60% | 26,643 psi | 59% | 1283 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 31,633 psi | 70% | 1309 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 31,024 psi | 69% | 1322 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 33,257 psi | 74% | 1224 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 88% | 20,653 psi | 46% | 1339 fps | 86.2% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 23,453 psi | 52% | 1289 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 31,183 psi | 69% | 1325 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 33,489 psi | 74% | 1545 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 32,895 psi | 73% | 1411 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 29,834 psi | 66% | 1342 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 27,949 psi | 62% | 1385 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 19,479 psi | 43% | 1266 fps | 93.5% |
| Vihtavuori N105*² | <<locked>> | 60% | 16,636 psi | 37% | 1240 fps | 94.9% |
| Vihtavuori N110* | <<locked>> | 88% | 24,947 psi | 55% | 1463 fps | 86.8% |
| Vihtavuori N320² | <<locked>> | 60% | 33,910 psi | 75% | 1306 fps | 100% |
| Vihtavuori N32C Tin Star² | 6.5 gr | 60% | 17,579 psi | 39% | 981 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 34,171 psi | 76% | 1365 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 29,762 psi | 66% | 1345 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 24,468 psi | 54% | 1319 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 27,862 psi | 62% | 1286 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 12 powders for .357 Maximum loaded with the .355 | 154gr | Geco FMJ FLAT NOSE. Hodgdon LilGun delivers the highest muzzle velocity at 1,755 fps; across all powders the maximum-charge window runs from 1,093 fps to 1,755 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 12 of the 12 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 47–90 %, 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 | 154gr | Geco FMJ FLAT NOSE they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon LilGun, SNPE Vectan BA6 1/2, Vihtavuori N110 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.