Load Specifications
Load data in caliber .357 Mag. with .356 | 147gr | Rim Rock FP bullet and 65 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>> | 76% | 38,609 psi | 89% | 1322 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 36,289 psi | 83% | 1450 fps | 92.9% |
| Accurate Solo 1000² | <<locked>> | 76% | 36,970 psi | 85% | 1207 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 35,926 psi | 83% | 1253 fps | 100% |
| Accurate TCM* | <<locked>> | 84% | 35,650 psi | 82% | 1424 fps | 88.2% |
| ADI AP 100ᴾ | <<locked>> | 100% | 39,334 psi | 90% | 1434 fps | 99.6% |
| ADI AP 70N² | <<locked>> | 68% | 37,652 psi | 87% | 1289 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 38,072 psi | 88% | 1115 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 36,898 psi | 85% | 1138 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 38,624 psi | 89% | 1194 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 39,334 psi | 90% | 1247 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 37,420 psi | 86% | 1260 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 37,956 psi | 87% | 1460 fps | 92.4% |
| Alliant BULLSEYE² | <<locked>> | 72% | 37,637 psi | 87% | 1345 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 38,740 psi | 89% | 1247 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 37,391 psi | 86% | 1345 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 36,071 psi | 83% | 1437 fps | 98.8% |
| Alliant RED DOT | <<locked>> | 80% | 37,289 psi | 86% | 1201 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 38,812 psi | 89% | 1362 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 36,332 psi | 84% | 1335 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 36,448 psi | 84% | 1204 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 37,057 psi | 85% | 1227 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 36,230 psi | 83% | 1227 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 39,291 psi | 90% | 1158 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 38,943 psi | 90% | 1404 fps | 100% |
| Hodgdon Longshot² | <<locked>> | 64% | 38,014 psi | 87% | 1385 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,853 psi | 39% | 906 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 38,653 psi | 89% | 1299 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 36,289 psi | 83% | 1450 fps | 92.9% |
| Lovex S011² | <<locked>> | 68% | 39,262 psi | 90% | 1260 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 36,085 psi | 83% | 1289 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 36,593 psi | 84% | 1257 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 36,274 psi | 83% | 1253 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 37,985 psi | 87% | 1247 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 36,651 psi | 84% | 1214 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 36,492 psi | 84% | 1161 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 38,218 psi | 88% | 1358 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 39,320 psi | 90% | 1394 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 35,694 psi | 82% | 1230 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 15,519 psi | 36% | 915 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 38,856 psi | 89% | 1355 fps | 100% |
| ReloadSwiss RS 24 | <<locked>> | 84% | 37,956 psi | 87% | 1460 fps | 95.6% |
| Rottweil P 801² | <<locked>> | 64% | 35,824 psi | 82% | 1201 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 37,463 psi | 86% | 1470 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 36,289 psi | 83% | 1450 fps | 92.9% |
| SNPE Vectan A0 | <<locked>> | 84% | 36,883 psi | 85% | 1296 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 37,420 psi | 86% | 1253 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 36,434 psi | 84% | 1263 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 37,927 psi | 87% | 1148 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 36,042 psi | 83% | 1348 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 35,853 psi | 82% | 1263 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 37,043 psi | 85% | 1453 fps | 99.7% |
| Somchem MP200² | <<locked>> | 76% | 38,101 psi | 88% | 1348 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 37,869 psi | 87% | 1319 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 35,201 psi | 81% | 1394 fps | 97% |
| Vihtavuori 3N37 | <<locked>> | 80% | 35,259 psi | 81% | 1358 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 96% | 36,129 psi | 83% | 1421 fps | 95.6% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 34,592 psi | 80% | 1457 fps | 98.3% |
| Vihtavuori N320² | <<locked>> | 72% | 35,824 psi | 82% | 1207 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 31,241 psi | 72% | 1089 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 39,131 psi | 90% | 1302 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 37,681 psi | 87% | 1319 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 37,956 psi | 87% | 1385 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 36,608 psi | 84% | 1253 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 38,957 psi | 90% | 1306 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% | 23,337 psi | 54% | 1122 fps | 100% |
| Accurate No. 7*² | <<locked>> | 64% | 23,598 psi | 54% | 1240 fps | 85.6% |
| Accurate Solo 1000² | <<locked>> | 60% | 25,019 psi | 57% | 1060 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 20,755 psi | 48% | 1047 fps | 100% |
| Accurate TCM* | <<locked>> | 80% | 31,314 psi | 72% | 1362 fps | 85.9% |
| ADI AP 100*² | 6.2 gr | 60% | 13,924 psi | 32% | 961 fps | 85.8% |
| ADI AP 70N² | <<locked>> | 60% | 30,371 psi | 70% | 1201 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,934 psi | 62% | 988 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,759 psi | 59% | 1004 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 24,424 psi | 56% | 1024 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 26,194 psi | 60% | 1089 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 21,828 psi | 50% | 1060 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 84% | 25,150 psi | 58% | 1253 fps | 85.3% |
| Alliant BULLSEYE² | <<locked>> | 60% | 26,774 psi | 62% | 1198 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 24,236 psi | 56% | 1063 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 15,432 psi | 35% | 984 fps | 99.2% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 20,204 psi | 46% | 1148 fps | 91.5% |
| Alliant RED DOT² | <<locked>> | 60% | 23,177 psi | 53% | 1020 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 30,472 psi | 70% | 1257 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 21,422 psi | 49% | 1115 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 23,134 psi | 53% | 1040 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,794 psi | 34% | 912 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 25,556 psi | 59% | 1102 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,480 psi | 49% | 942 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 29,486 psi | 68% | 1276 fps | 99.5% |
| Hodgdon Longshot² | <<locked>> | 60% | 33,011 psi | 76% | 1322 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,789 psi | 18% | 676 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 24,758 psi | 57% | 1122 fps | 100% |
| Lovex D037.1*² | <<locked>> | 64% | 23,598 psi | 54% | 1240 fps | 85.6% |
| Lovex S011² | <<locked>> | 60% | 31,227 psi | 72% | 1171 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 24,540 psi | 56% | 1138 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,856 psi | 46% | 1027 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 21,176 psi | 49% | 1056 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,307 psi | 51% | 1047 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 23,960 psi | 55% | 1053 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,601 psi | 63% | 1060 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 29,907 psi | 69% | 1253 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 34,243 psi | 79% | 1332 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 28,398 psi | 65% | 1145 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,455 psi | 17% | 682 fps | 99.7% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 19,522 psi | 45% | 1086 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 64% | 20,218 psi | 46% | 1148 fps | 85.2% |
| Rottweil P 801² | <<locked>> | 60% | 32,126 psi | 74% | 1161 fps | 100% |
| Rottweil P 806*² | 8.9 gr | 60% | 14,170 psi | 33% | 1047 fps | 91.9% |
| Shooters World Major Pistol*² | <<locked>> | 64% | 23,598 psi | 54% | 1240 fps | 85.6% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,638 psi | 45% | 1047 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 24,598 psi | 57% | 1093 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 23,743 psi | 55% | 1096 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,355 psi | 65% | 1040 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 17,013 psi | 39% | 1024 fps | 95% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 23,525 psi | 54% | 1099 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 21,727 psi | 50% | 1201 fps | 94.7% |
| Somchem MP200² | <<locked>> | 60% | 24,439 psi | 56% | 1161 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 21,872 psi | 50% | 1096 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 26,397 psi | 61% | 1257 fps | 93.3% |
| Vihtavuori 3N37² | <<locked>> | 60% | 19,334 psi | 44% | 1099 fps | 97.5% |
| Vihtavuori 3N38*² | <<locked>> | 76% | 20,856 psi | 48% | 1161 fps | 87% |
| Vihtavuori N105*² | 8.9 gr | 76% | 17,158 psi | 39% | 1129 fps | 87.6% |
| Vihtavuori N320² | <<locked>> | 60% | 25,382 psi | 58% | 1083 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 13,213 psi | 30% | 817 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 24,395 psi | 56% | 1122 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 21,277 psi | 49% | 1093 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 16,665 psi | 38% | 1037 fps | 96.2% |
| Winchester 231² | <<locked>> | 60% | 32,866 psi | 76% | 1211 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 20,581 psi | 47% | 1060 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 .356 | 147gr | Rim Rock FP. Rottweil P 806 delivers the highest muzzle velocity at 1,470 fps; across all powders the maximum-charge window runs from 906 fps to 1,470 fps. ADI AP 100 gives the best case fill at 100 %, and 31 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 36–90 %, leaving at least 10 % headroom. ADI AP 100, Alliant BLUE DOT, Hodgdon TrailBoss 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 .356 | 147gr | Rim Rock FP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 7, Accurate TCM, Alliant BLUE DOT burn incompletely and react more sensitively to barrel length and temperature. Accurate No. 2, Accurate Solo 1000, Accurate Solo 1250 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.