Load Specifications
Load data in caliber .357 Mag. with .358 | 148gr | Rim Rock DEWC Top Shelf 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 N105, ADI AP 100 and Alliant Herco.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 72% | 37,681 psi | 87% | 1345 fps | 100% |
| Accurate No. 7*² | <<locked>> | 72% | 36,013 psi | 83% | 1476 fps | 94.1% |
| Accurate No. 9* | <<locked>> | 80% | 35,955 psi | 83% | 1470 fps | 88.6% |
| Accurate Solo 1000² | <<locked>> | 76% | 38,986 psi | 90% | 1257 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 39,276 psi | 90% | 1316 fps | 100% |
| Accurate TCM* | <<locked>> | 80% | 36,085 psi | 83% | 1467 fps | 90.1% |
| ADI AP 100 | <<locked>> | 92% | 36,143 psi | 83% | 1424 fps | 99.6% |
| ADI AP 70N² | <<locked>> | 64% | 36,622 psi | 84% | 1302 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 36,709 psi | 84% | 1132 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 38,798 psi | 89% | 1184 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 38,014 psi | 87% | 1217 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 38,392 psi | 88% | 1266 fps | 100% |
| Alliant BE-86² | <<locked>> | 76% | 36,999 psi | 85% | 1280 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 38,856 psi | 89% | 1509 fps | 94.2% |
| Alliant BULLSEYE² | <<locked>> | 68% | 36,579 psi | 84% | 1358 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 38,783 psi | 89% | 1273 fps | 100% |
| Alliant Herco | <<locked>> | 92% | 37,434 psi | 86% | 1368 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 76% | 36,811 psi | 85% | 1476 fps | 99.4% |
| Alliant RED DOT² | <<locked>> | 76% | 36,970 psi | 85% | 1224 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 37,420 psi | 86% | 1371 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 76% | 35,911 psi | 83% | 1355 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 39,030 psi | 90% | 1260 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 92% | 37,188 psi | 85% | 1253 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 68% | 35,114 psi | 81% | 1237 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 38,058 psi | 87% | 1175 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 38,218 psi | 88% | 1424 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 18,594 psi | 43% | 955 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 37,478 psi | 86% | 1312 fps | 100% |
| Lovex D037.1*² | <<locked>> | 72% | 36,013 psi | 83% | 1476 fps | 94.1% |
| Lovex D037.2* | <<locked>> | 80% | 36,695 psi | 84% | 1480 fps | 89% |
| Lovex S011² | <<locked>> | 64% | 37,956 psi | 87% | 1276 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 39,305 psi | 90% | 1348 fps | 100% |
| Maxam CSB 1 | <<locked>> | 80% | 36,158 psi | 83% | 1276 fps | 100% |
| Maxam CSB 2² | <<locked>> | 76% | 36,332 psi | 84% | 1276 fps | 100% |
| Maxam CSB 3² | <<locked>> | 76% | 36,912 psi | 85% | 1263 fps | 100% |
| Maxam CSB 4² | <<locked>> | 72% | 35,955 psi | 83% | 1234 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 39,015 psi | 90% | 1217 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 64% | 37,608 psi | 86% | 1378 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 38,696 psi | 89% | 1286 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 17,158 psi | 39% | 961 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 38,725 psi | 89% | 1378 fps | 100% |
| ReloadSwiss RS 24 | <<locked>> | 80% | 38,116 psi | 88% | 1496 fps | 96.7% |
| Rottweil P 801² | <<locked>> | 64% | 38,624 psi | 89% | 1253 fps | 100% |
| Rottweil P 806 | <<locked>> | 84% | 38,464 psi | 88% | 1503 fps | 100% |
| Shooters World Heavy Pistol* | <<locked>> | 80% | 36,695 psi | 84% | 1480 fps | 89% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 36,013 psi | 83% | 1476 fps | 94.1% |
| SNPE Vectan A0 | <<locked>> | 80% | 36,724 psi | 84% | 1322 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 72% | 37,159 psi | 85% | 1276 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 72% | 36,332 psi | 84% | 1286 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 36,100 psi | 83% | 1158 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 84% | 36,361 psi | 84% | 1381 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 38,856 psi | 89% | 1322 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 72% | 37,159 psi | 85% | 1483 fps | 99.9% |
| Somchem MP200² | <<locked>> | 72% | 37,855 psi | 87% | 1371 fps | 100% |
| Somchem MS200² | <<locked>> | 76% | 37,086 psi | 85% | 1339 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 39,334 psi | 90% | 1486 fps | 98.8% |
| Vihtavuori 3N37 | <<locked>> | 80% | 39,291 psi | 90% | 1434 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 88% | 35,375 psi | 81% | 1444 fps | 96.5% |
| Vihtavuori N105 | <<locked>> | 96% | 36,811 psi | 85% | 1512 fps | 99.4% |
| Vihtavuori N320² | <<locked>> | 72% | 38,725 psi | 89% | 1263 fps | 100% |
| Vihtavuori N32C Tin Star | <<locked>> | 96% | 36,492 psi | 84% | 1168 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 37,318 psi | 86% | 1306 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 36,593 psi | 84% | 1335 fps | 100% |
| Vihtavuori N350 | <<locked>> | 80% | 35,998 psi | 83% | 1391 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 38,914 psi | 89% | 1329 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% | 25,599 psi | 59% | 1184 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 23,163 psi | 53% | 1257 fps | 86.8% |
| Accurate No. 9*² | <<locked>> | 76% | 30,922 psi | 71% | 1391 fps | 86% |
| Accurate Solo 1000² | <<locked>> | 60% | 26,382 psi | 61% | 1102 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 23,337 psi | 54% | 1109 fps | 100% |
| Accurate TCM*² | <<locked>> | 72% | 27,543 psi | 63% | 1329 fps | 85.3% |
| ADI AP 100*² | 7.1 gr | 60% | 15,287 psi | 35% | 1020 fps | 89% |
| ADI AP 70N² | <<locked>> | 60% | 32,518 psi | 75% | 1250 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 27,847 psi | 64% | 1024 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 27,079 psi | 62% | 1047 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 26,136 psi | 60% | 1070 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 28,311 psi | 65% | 1142 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 23,656 psi | 54% | 1109 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 80% | 25,527 psi | 59% | 1289 fps | 87.3% |
| Alliant BULLSEYE² | <<locked>> | 60% | 29,211 psi | 67% | 1260 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 25,701 psi | 59% | 1106 fps | 100% |
| Alliant Herco² | 6.5 gr | 60% | 17,202 psi | 40% | 1043 fps | 100% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 22,626 psi | 52% | 1227 fps | 94.5% |
| Alliant RED DOT² | <<locked>> | 60% | 25,150 psi | 58% | 1070 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 33,243 psi | 76% | 1319 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 23,090 psi | 53% | 1165 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 25,802 psi | 59% | 1102 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 16,360 psi | 38% | 958 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 28,065 psi | 65% | 1155 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 22,379 psi | 51% | 974 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 33,156 psi | 76% | 1358 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,644 psi | 20% | 715 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 27,238 psi | 63% | 1178 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 23,163 psi | 53% | 1257 fps | 86.8% |
| Lovex D037.2*² | <<locked>> | 76% | 32,097 psi | 74% | 1411 fps | 86.7% |
| Lovex S011² | <<locked>> | 60% | 33,475 psi | 77% | 1224 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 27,514 psi | 63% | 1204 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 21,712 psi | 50% | 1079 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 24,033 psi | 55% | 1119 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 24,381 psi | 56% | 1099 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 26,194 psi | 60% | 1106 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 29,182 psi | 67% | 1102 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 33,054 psi | 76% | 1322 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 31,053 psi | 71% | 1198 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,934 psi | 18% | 712 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 21,799 psi | 50% | 1145 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 20,001 psi | 46% | 1168 fps | 86.6% |
| Rottweil P 801² | <<locked>> | 60% | 34,330 psi | 79% | 1207 fps | 100% |
| Rottweil P 806² | <<locked>> | 60% | 16,940 psi | 39% | 1132 fps | 95.6% |
| Shooters World Heavy Pistol*² | <<locked>> | 76% | 32,097 psi | 74% | 1411 fps | 86.7% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 23,163 psi | 53% | 1257 fps | 86.8% |
| SNPE Vectan A0² | <<locked>> | 60% | 21,669 psi | 50% | 1106 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 26,353 psi | 61% | 1142 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 25,570 psi | 59% | 1148 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 30,211 psi | 69% | 1086 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 18,782 psi | 43% | 1089 fps | 97.2% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 25,802 psi | 59% | 1155 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 24,903 psi | 57% | 1283 fps | 97.4% |
| Somchem MP200² | <<locked>> | 60% | 26,876 psi | 62% | 1224 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 24,018 psi | 55% | 1155 fps | 100% |
| Somchem S221² | <<locked>> | 60% | 29,428 psi | 68% | 1339 fps | 96% |
| Vihtavuori 3N37² | <<locked>> | 60% | 21,263 psi | 49% | 1161 fps | 99% |
| Vihtavuori 3N38*² | <<locked>> | 68% | 19,493 psi | 45% | 1155 fps | 87.2% |
| Vihtavuori N105*² | 9.1 gr | 68% | 15,156 psi | 35% | 1093 fps | 86.5% |
| Vihtavuori N320² | <<locked>> | 60% | 27,224 psi | 63% | 1129 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 16,273 psi | 37% | 892 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 25,860 psi | 59% | 1161 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 23,206 psi | 53% | 1148 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 19,682 psi | 45% | 1129 fps | 98.7% |
| Winchester AutoComp ² | <<locked>> | 60% | 22,843 psi | 53% | 1119 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 Mag. loaded with the .358 | 148gr | Rim Rock DEWC Top Shelf. Vihtavuori N105 delivers the highest muzzle velocity at 1,512 fps; across all powders the maximum-charge window runs from 955 fps to 1,512 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 24 of the 65 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 39–90 %, leaving at least 10 % headroom. 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. Vihtavuori N105, ADI AP 100, Alliant Herco rank at the top here: for .357 Mag. with the .358 | 148gr | Rim Rock DEWC Top Shelf 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.