Load Specifications
Load data in caliber .357 Maximum with .358 | 158gr | Speer LSWC bullet and 65 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 4100* | <<locked>> | 84% | 36,666 psi | 82% | 1637 fps | 90.6% |
| Accurate No. 2² | <<locked>> | 64% | 36,289 psi | 81% | 1427 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 36,332 psi | 81% | 1617 fps | 98.9% |
| Accurate No. 9² | <<locked>> | 72% | 37,014 psi | 82% | 1631 fps | 95.8% |
| Accurate Solo 1000² | <<locked>> | 68% | 37,347 psi | 83% | 1332 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 38,653 psi | 86% | 1401 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 36,956 psi | 82% | 1621 fps | 96.7% |
| ADI AP 100 | <<locked>> | 84% | 37,840 psi | 84% | 1558 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 39,958 psi | 89% | 1266 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 39,537 psi | 88% | 1293 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 39,668 psi | 88% | 1329 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 40,277 psi | 90% | 1381 fps | 100% |
| Alliant 2400* | <<locked>> | 84% | 40,437 psi | 90% | 1706 fps | 94.8% |
| Alliant BE-86² | <<locked>> | 72% | 39,885 psi | 89% | 1401 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 37,391 psi | 83% | 1627 fps | 98.5% |
| Alliant BULLSEYE² | <<locked>> | 64% | 40,161 psi | 89% | 1499 fps | 100% |
| Alliant Green Dot² | <<locked>> | 72% | 40,422 psi | 90% | 1385 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 38,043 psi | 85% | 1473 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 36,738 psi | 82% | 1591 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 88% | 36,999 psi | 82% | 1680 fps | 88.2% |
| Alliant RED DOT² | <<locked>> | 72% | 38,624 psi | 86% | 1339 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 39,436 psi | 88% | 1493 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 37,173 psi | 83% | 1329 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 88% | 40,495 psi | 90% | 1375 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 37,391 psi | 83% | 1348 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 39,291 psi | 87% | 1286 fps | 100% |
| Hodgdon H110* | <<locked>> | 88% | 38,435 psi | 85% | 1706 fps | 88% |
| Hodgdon LilGun* | <<locked>> | 92% | 37,492 psi | 83% | 1736 fps | 94.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 21,640 psi | 48% | 1076 fps | 100% |
| Hodgdon Universal² | <<locked>> | 68% | 40,683 psi | 90% | 1440 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 36,332 psi | 81% | 1617 fps | 98.9% |
| Lovex D037.2² | <<locked>> | 72% | 38,072 psi | 85% | 1644 fps | 96.1% |
| Lovex S020² | <<locked>> | 64% | 38,145 psi | 85% | 1427 fps | 100% |
| Maxam CSB 1² | <<locked>> | 76% | 39,769 psi | 88% | 1407 fps | 100% |
| Maxam CSB 2² | <<locked>> | 72% | 39,987 psi | 89% | 1404 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 39,392 psi | 88% | 1381 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 37,811 psi | 84% | 1342 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 36,608 psi | 81% | 1283 fps | 100% |
| Ramshot Enforcer | <<locked>> | 84% | 40,669 psi | 90% | 1713 fps | 95.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 19,841 psi | 44% | 1086 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 39,479 psi | 88% | 1473 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 39,450 psi | 88% | 1644 fps | 99.9% |
| Rottweil P 806² | <<locked>> | 72% | 35,520 psi | 79% | 1558 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 38,072 psi | 85% | 1644 fps | 96.1% |
| Shooters World Major Pistol² | <<locked>> | 64% | 36,332 psi | 81% | 1617 fps | 98.9% |
| SNPE Vectan A0² | <<locked>> | 76% | 40,640 psi | 90% | 1460 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 39,334 psi | 87% | 1394 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 38,812 psi | 86% | 1407 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 40,205 psi | 89% | 1299 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 28,094 psi | 62% | 1499 fps | 92.7% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 36,898 psi | 82% | 1490 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 37,869 psi | 84% | 1401 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 37,579 psi | 84% | 1594 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 36,883 psi | 82% | 1453 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 36,245 psi | 81% | 1421 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 72% | 39,972 psi | 89% | 1542 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 84% | 39,856 psi | 89% | 1631 fps | 100% |
| Vihtavuori N105 | <<locked>> | 84% | 36,376 psi | 81% | 1614 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 35,607 psi | 79% | 1654 fps | 93.7% |
| Vihtavuori N320² | <<locked>> | 64% | 37,478 psi | 83% | 1339 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 38,754 psi | 86% | 1280 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 37,492 psi | 83% | 1394 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 37,043 psi | 82% | 1430 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 39,204 psi | 87% | 1526 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 37,768 psi | 84% | 1407 fps | 100% |
Start Load - Barrel Length: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4100*² | <<locked>> | 76% | 27,441 psi | 61% | 1476 fps | 85.4% |
| Accurate No. 2² | <<locked>> | 60% | 31,401 psi | 70% | 1362 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 31,183 psi | 69% | 1532 fps | 97.6% |
| Accurate No. 9*² | <<locked>> | 60% | 23,221 psi | 52% | 1375 fps | 88.4% |
| Accurate Solo 1000² | <<locked>> | 60% | 30,821 psi | 69% | 1247 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 27,789 psi | 62% | 1260 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 23,511 psi | 52% | 1375 fps | 90% |
| ADI AP 100² | <<locked>> | 60% | 18,913 psi | 42% | 1220 fps | 97.8% |
| ADI APS 350² | <<locked>> | 60% | 31,082 psi | 69% | 1155 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 30,008 psi | 67% | 1171 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 29,660 psi | 66% | 1201 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 32,851 psi | 73% | 1289 fps | 100% |
| Alliant 2400*² | <<locked>> | 68% | 23,786 psi | 53% | 1401 fps | 85.7% |
| Alliant BE-86² | <<locked>> | 60% | 28,311 psi | 63% | 1257 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 17,724 psi | 39% | 1224 fps | 87.7% |
| Alliant BULLSEYE² | <<locked>> | 60% | 35,360 psi | 79% | 1437 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 29,979 psi | 67% | 1253 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 20,291 psi | 45% | 1194 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 28,500 psi | 63% | 1457 fps | 99.9% |
| Alliant Power Pro 300-MP* | <<locked>> | 84% | 32,053 psi | 71% | 1598 fps | 85.5% |
| Alliant RED DOT² | <<locked>> | 60% | 29,196 psi | 65% | 1214 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 28,456 psi | 63% | 1342 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 30,066 psi | 67% | 1243 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 19,551 psi | 43% | 1089 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 33,243 psi | 74% | 1302 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,396 psi | 56% | 1102 fps | 100% |
| Hodgdon H110* | <<locked>> | 84% | 33,315 psi | 74% | 1621 fps | 85.3% |
| Hodgdon LilGun* | <<locked>> | 80% | 23,554 psi | 52% | 1473 fps | 86.2% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 9,224 psi | 21% | 801 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 32,198 psi | 72% | 1335 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 31,183 psi | 69% | 1532 fps | 97.6% |
| Lovex D037.2*² | <<locked>> | 60% | 23,960 psi | 53% | 1391 fps | 89% |
| Lovex S020² | <<locked>> | 60% | 33,388 psi | 74% | 1371 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 25,933 psi | 58% | 1227 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 28,471 psi | 63% | 1260 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 29,182 psi | 65% | 1250 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 30,618 psi | 68% | 1250 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 33,214 psi | 74% | 1237 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 68% | 22,336 psi | 50% | 1385 fps | 86% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 8,543 psi | 19% | 804 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 27,282 psi | 61% | 1312 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 26,194 psi | 58% | 1421 fps | 97.1% |
| Rottweil P 806² | <<locked>> | 60% | 23,032 psi | 51% | 1362 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 23,960 psi | 53% | 1391 fps | 89% |
| Shooters World Major Pistol² | <<locked>> | 60% | 31,183 psi | 69% | 1532 fps | 97.6% |
| SNPE Vectan A0² | <<locked>> | 60% | 26,136 psi | 58% | 1266 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 31,705 psi | 71% | 1299 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 31,111 psi | 69% | 1312 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 33,054 psi | 74% | 1211 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 88% | 19,798 psi | 44% | 1316 fps | 86% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 22,698 psi | 50% | 1270 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 30,501 psi | 68% | 1306 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 32,866 psi | 73% | 1526 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 32,677 psi | 73% | 1401 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 29,138 psi | 65% | 1322 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 27,079 psi | 60% | 1362 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 18,434 psi | 41% | 1237 fps | 93.1% |
| Vihtavuori N105*² | <<locked>> | 60% | 15,490 psi | 34% | 1204 fps | 94.2% |
| Vihtavuori N110* | <<locked>> | 88% | 24,395 psi | 54% | 1447 fps | 87.1% |
| Vihtavuori N320² | <<locked>> | 60% | 33,286 psi | 74% | 1289 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 16,650 psi | 37% | 965 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 33,460 psi | 74% | 1345 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 29,037 psi | 65% | 1325 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 23,656 psi | 53% | 1296 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 27,021 psi | 60% | 1266 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 65 powders for .357 Maximum loaded with the .358 | 158gr | Speer LSWC. Hodgdon LilGun delivers the highest muzzle velocity at 1,736 fps; across all powders the maximum-charge window runs from 1,076 fps to 1,736 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 44–90 %, 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 4100, Alliant 2400, Alliant Power Pro 300-MP burn incompletely and react more sensitively to barrel length and temperature. Baschieri & Pellagri 102 Pistol, Hodgdon Clays, Hodgdon TrailBoss 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.