Load Specifications
Load data in caliber .357 Mag. with .358 | 148gr | Speer LHBWC bullet and 67 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, 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: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 72% | 34,505 psi | 79% | 1296 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 37,115 psi | 85% | 1486 fps | 94.1% |
| Accurate No. 9* | <<locked>> | 84% | 36,898 psi | 85% | 1470 fps | 88.4% |
| Accurate Solo 1000² | <<locked>> | 76% | 36,724 psi | 84% | 1224 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 37,043 psi | 85% | 1286 fps | 100% |
| Accurate TCM* | <<locked>> | 84% | 36,912 psi | 85% | 1467 fps | 89.8% |
| ADI AP 100 | <<locked>> | 96% | 36,390 psi | 84% | 1417 fps | 99.5% |
| ADI AP 70N² | <<locked>> | 68% | 38,232 psi | 88% | 1316 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 38,290 psi | 88% | 1135 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 37,768 psi | 87% | 1165 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 39,102 psi | 90% | 1220 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 35,563 psi | 82% | 1227 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 38,522 psi | 89% | 1289 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 38,783 psi | 89% | 1499 fps | 93.6% |
| Alliant BULLSEYE² | <<locked>> | 72% | 37,985 psi | 87% | 1368 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 38,856 psi | 89% | 1266 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 36,985 psi | 85% | 1358 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 37,608 psi | 86% | 1476 fps | 99.4% |
| Alliant RED DOT | <<locked>> | 80% | 37,855 psi | 87% | 1227 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 35,259 psi | 81% | 1339 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 36,738 psi | 84% | 1362 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 36,680 psi | 84% | 1227 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 37,115 psi | 85% | 1243 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 36,608 psi | 84% | 1247 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 38,914 psi | 89% | 1175 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 34,505 psi | 79% | 1368 fps | 100% |
| Hodgdon Longshot² | <<locked>> | 64% | 38,537 psi | 89% | 1411 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,360 psi | 38% | 919 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 38,232 psi | 88% | 1316 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 37,115 psi | 85% | 1486 fps | 94.1% |
| Lovex D037.2* | <<locked>> | 84% | 37,666 psi | 87% | 1480 fps | 88.7% |
| Lovex S011² | <<locked>> | 64% | 35,737 psi | 82% | 1240 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 35,839 psi | 82% | 1306 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 37,463 psi | 86% | 1283 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 36,927 psi | 85% | 1283 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 38,247 psi | 88% | 1270 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 37,188 psi | 85% | 1237 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 37,376 psi | 86% | 1191 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 39,305 psi | 90% | 1388 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 39,262 psi | 90% | 1289 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 14,649 psi | 34% | 919 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 39,363 psi | 90% | 1378 fps | 100% |
| ReloadSwiss RS 24 | <<locked>> | 80% | 34,679 psi | 80% | 1434 fps | 95.1% |
| Rottweil P 801² | <<locked>> | 68% | 39,349 psi | 90% | 1260 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 38,189 psi | 88% | 1496 fps | 100% |
| Shooters World Heavy Pistol* | <<locked>> | 84% | 37,666 psi | 87% | 1480 fps | 88.7% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 37,115 psi | 85% | 1486 fps | 94.1% |
| SNPE Vectan A0 | <<locked>> | 84% | 37,492 psi | 86% | 1322 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 38,043 psi | 87% | 1280 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 37,159 psi | 85% | 1286 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 38,725 psi | 89% | 1175 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 36,521 psi | 84% | 1375 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 36,666 psi | 84% | 1289 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 38,189 psi | 88% | 1490 fps | 99.9% |
| Somchem MP200² | <<locked>> | 76% | 39,305 psi | 90% | 1381 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 38,406 psi | 88% | 1345 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 35,491 psi | 82% | 1424 fps | 97.7% |
| Vihtavuori 3N37 | <<locked>> | 80% | 35,897 psi | 83% | 1385 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 96% | 37,405 psi | 86% | 1463 fps | 96.7% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 36,129 psi | 83% | 1496 fps | 99.1% |
| Vihtavuori N320² | <<locked>> | 72% | 36,332 psi | 84% | 1234 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 30,951 psi | 71% | 1106 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 36,013 psi | 83% | 1286 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 38,261 psi | 88% | 1345 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 38,740 psi | 89% | 1411 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 37,550 psi | 86% | 1280 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 35,476 psi | 82% | 1286 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 23,859 psi | 55% | 1148 fps | 100% |
| Accurate No. 7*² | <<locked>> | 64% | 23,844 psi | 55% | 1266 fps | 86.7% |
| Accurate No. 9* | <<locked>> | 80% | 31,850 psi | 73% | 1398 fps | 85.8% |
| Accurate Solo 1000² | <<locked>> | 60% | 24,468 psi | 56% | 1070 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 20,595 psi | 47% | 1063 fps | 100% |
| Accurate TCM* | <<locked>> | 80% | 31,821 psi | 73% | 1394 fps | 87.3% |
| ADI AP 100*² | 6.6 gr | 60% | 13,271 psi | 31% | 965 fps | 85.7% |
| ADI AP 70N² | <<locked>> | 60% | 29,428 psi | 68% | 1211 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,760 psi | 62% | 1004 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,411 psi | 58% | 1014 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 24,497 psi | 56% | 1043 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 25,947 psi | 60% | 1106 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 21,161 psi | 49% | 1066 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 84% | 25,454 psi | 59% | 1283 fps | 86.6% |
| Alliant BULLSEYE² | <<locked>> | 60% | 27,441 psi | 63% | 1227 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 24,062 psi | 55% | 1083 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 14,620 psi | 34% | 984 fps | 99.2% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 19,899 psi | 46% | 1165 fps | 92% |
| Alliant RED DOT² | <<locked>> | 60% | 23,322 psi | 54% | 1043 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 30,922 psi | 71% | 1280 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 20,784 psi | 48% | 1125 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 23,003 psi | 53% | 1060 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,272 psi | 33% | 922 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 25,570 psi | 59% | 1119 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,219 psi | 49% | 955 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 30,124 psi | 69% | 1309 fps | 99.8% |
| Hodgdon Longshot² | <<locked>> | 60% | 33,692 psi | 77% | 1352 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,715 psi | 15% | 666 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 24,787 psi | 57% | 1145 fps | 100% |
| Lovex D037.1*² | <<locked>> | 64% | 23,844 psi | 55% | 1266 fps | 86.7% |
| Lovex D037.2* | <<locked>> | 80% | 32,532 psi | 75% | 1407 fps | 86.2% |
| Lovex S011² | <<locked>> | 60% | 31,053 psi | 71% | 1188 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 24,656 psi | 57% | 1161 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,638 psi | 45% | 1043 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 20,610 psi | 47% | 1066 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,278 psi | 51% | 1066 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 24,062 psi | 55% | 1073 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,021 psi | 62% | 1070 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 30,342 psi | 70% | 1280 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 27,514 psi | 63% | 1155 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 6,179 psi | 14% | 663 fps | 98.7% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 19,116 psi | 44% | 1096 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 64% | 20,450 psi | 47% | 1178 fps | 86.4% |
| Rottweil P 801² | <<locked>> | 60% | 31,140 psi | 72% | 1168 fps | 100% |
| Rottweil P 806*² | 9.6 gr | 60% | 13,460 psi | 31% | 1047 fps | 91.4% |
| Shooters World Heavy Pistol* | <<locked>> | 80% | 32,532 psi | 75% | 1407 fps | 86.2% |
| Shooters World Major Pistol*² | <<locked>> | 64% | 23,844 psi | 55% | 1266 fps | 86.7% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,928 psi | 46% | 1070 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 24,874 psi | 57% | 1115 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 24,062 psi | 55% | 1119 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,718 psi | 66% | 1060 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 16,723 psi | 38% | 1040 fps | 95.4% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 23,134 psi | 53% | 1112 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 21,611 psi | 50% | 1217 fps | 95.3% |
| Somchem MP200² | <<locked>> | 60% | 24,352 psi | 56% | 1181 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 22,046 psi | 51% | 1119 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 26,208 psi | 60% | 1276 fps | 94% |
| Vihtavuori 3N37² | <<locked>> | 60% | 18,985 psi | 44% | 1112 fps | 97.8% |
| Vihtavuori 3N38*² | <<locked>> | 72% | 18,478 psi | 42% | 1129 fps | 85.6% |
| Vihtavuori N105*² | 9.5 gr | 76% | 16,636 psi | 38% | 1135 fps | 88% |
| Vihtavuori N320² | <<locked>> | 60% | 25,266 psi | 58% | 1099 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,328 psi | 28% | 820 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 24,714 psi | 57% | 1145 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 21,437 psi | 49% | 1115 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 16,505 psi | 38% | 1053 fps | 96.6% |
| Winchester 231² | <<locked>> | 60% | 33,083 psi | 76% | 1230 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 20,363 psi | 47% | 1076 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 67 powders for .357 Mag. loaded with the .358 | 148gr | Speer LHBWC. Alliant BLUE DOT delivers the highest muzzle velocity at 1,499 fps; across all powders the maximum-charge window runs from 919 fps to 1,499 fps. Alliant BLUE DOT gives the best case fill at 100 %, and 34 of the 67 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 34–90 %, leaving at least 10 % headroom. Alliant BLUE DOT, Hodgdon TrailBoss, ReloadSwiss RS 14 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. Rottweil P 806, Vihtavuori N105, ADI AP 100 rank at the top here: for .357 Mag. with the .358 | 148gr | Speer LHBWC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 7, Accurate No. 9, Accurate TCM burn incompletely and react more sensitively to barrel length and temperature. Accurate Solo 1000, Accurate Solo 1250, ADI AP 100 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.