Load Specifications
Load data in caliber .38-45 ACP with .358 | 120gr | Rim Rock TC Cowboy bullet and 56 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, Alliant Herco and SNPE Vectan BA7 1/2.
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: 5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 72% | 29,153 psi | 86% | 1316 fps | 99.7% |
| Accurate Solo 1000² | <<locked>> | 72% | 29,878 psi | 88% | 1240 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 30,676 psi | 90% | 1316 fps | 100% |
| ADI AP 100* | <<locked>> | 96% | 29,515 psi | 87% | 1388 fps | 92.8% |
| ADI AP 70N² | <<locked>> | 64% | 28,950 psi | 85% | 1302 fps | 100% |
| ADI APS 350² | <<locked>> | 68% | 29,631 psi | 87% | 1125 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 30,545 psi | 90% | 1175 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 29,472 psi | 86% | 1207 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 28,123 psi | 83% | 1234 fps | 100% |
| Alliant BE-86² | <<locked>> | 76% | 28,877 psi | 85% | 1280 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 68% | 28,964 psi | 85% | 1348 fps | 100% |
| Alliant Green Dot² | <<locked>> | 72% | 28,572 psi | 84% | 1243 fps | 100% |
| Alliant Herco | <<locked>> | 92% | 28,921 psi | 85% | 1352 fps | 100% |
| Alliant POWER PISTOL* | <<locked>> | 80% | 30,081 psi | 88% | 1440 fps | 92.2% |
| Alliant RED DOT² | <<locked>> | 76% | 30,821 psi | 90% | 1247 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 29,965 psi | 88% | 1368 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 30,748 psi | 90% | 1385 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 72% | 28,036 psi | 82% | 1224 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 92% | 28,514 psi | 84% | 1250 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 68% | 27,789 psi | 82% | 1247 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 72% | 27,659 psi | 81% | 1280 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 30,008 psi | 88% | 1165 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 28,572 psi | 84% | 1362 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 14,692 psi | 43% | 958 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 29,762 psi | 87% | 1316 fps | 100% |
| Lovex S011² | <<locked>> | 64% | 30,487 psi | 89% | 1280 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 30,342 psi | 89% | 1342 fps | 100% |
| Maxam CSB 1 | <<locked>> | 80% | 28,964 psi | 85% | 1286 fps | 100% |
| Maxam CSB 2² | <<locked>> | 76% | 27,905 psi | 82% | 1280 fps | 100% |
| Maxam CSB 3² | <<locked>> | 76% | 29,428 psi | 86% | 1270 fps | 100% |
| Maxam CSB 4² | <<locked>> | 72% | 29,211 psi | 86% | 1243 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 29,240 psi | 86% | 1194 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 64% | 28,732 psi | 84% | 1348 fps | 99.8% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 30,008 psi | 88% | 1293 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 13,329 psi | 39% | 955 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 28,906 psi | 85% | 1358 fps | 100% |
| Rottweil P 801² | <<locked>> | 64% | 30,748 psi | 90% | 1266 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 28,268 psi | 83% | 1453 fps | 96.7% |
| SNPE Vectan A0 | <<locked>> | 80% | 28,587 psi | 84% | 1306 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 72% | 29,457 psi | 86% | 1276 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 72% | 28,456 psi | 83% | 1280 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 64% | 28,776 psi | 84% | 1148 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 30,589 psi | 90% | 1381 fps | 97.7% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 30,821 psi | 90% | 1322 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 76% | 29,878 psi | 88% | 1457 fps | 94.2% |
| Somchem MP200² | <<locked>> | 72% | 29,356 psi | 86% | 1352 fps | 100% |
| Somchem MS200² | <<locked>> | 76% | 29,298 psi | 86% | 1329 fps | 100% |
| Somchem S221*² | <<locked>> | 68% | 28,703 psi | 84% | 1385 fps | 88.7% |
| Vihtavuori 3N37 | <<locked>> | 80% | 29,312 psi | 86% | 1385 fps | 98.1% |
| Vihtavuori N105*ᴾ | <<locked>> | 100% | 26,934 psi | 79% | 1427 fps | 89.2% |
| Vihtavuori N320² | <<locked>> | 72% | 30,632 psi | 90% | 1273 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 26,789 psi | 79% | 1148 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 29,283 psi | 86% | 1316 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 28,631 psi | 84% | 1322 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 28,384 psi | 83% | 1365 fps | 98% |
| Winchester AutoComp | <<locked>> | 80% | 30,327 psi | 89% | 1325 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 20,363 psi | 60% | 1155 fps | 97% |
| Accurate Solo 1000² | <<locked>> | 60% | 21,727 psi | 64% | 1112 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 17,999 psi | 53% | 1093 fps | 100% |
| ADI AP 100* | <<locked>> | 80% | 19,972 psi | 59% | 1191 fps | 85.9% |
| ADI AP 70N² | <<locked>> | 60% | 25,831 psi | 76% | 1253 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 24,105 psi | 71% | 1047 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 22,916 psi | 67% | 1063 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 21,959 psi | 64% | 1089 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 22,582 psi | 66% | 1142 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 18,347 psi | 54% | 1096 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 60% | 23,511 psi | 69% | 1250 fps | 99.8% |
| Alliant Green Dot² | <<locked>> | 60% | 20,885 psi | 61% | 1115 fps | 100% |
| Alliant Herco*² | 5.5 gr | 60% | 12,923 psi | 38% | 984 fps | 93.2% |
| Alliant POWER PISTOL*² | <<locked>> | 68% | 21,277 psi | 62% | 1257 fps | 86% |
| Alliant RED DOT² | <<locked>> | 60% | 20,682 psi | 61% | 1086 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 26,063 psi | 76% | 1299 fps | 99.9% |
| Alliant UNIQUE² | <<locked>> | 60% | 17,912 psi | 53% | 1132 fps | 97.5% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 20,378 psi | 60% | 1099 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 12,720 psi | 37% | 951 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 21,741 psi | 64% | 1152 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 19,711 psi | 58% | 1138 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 18,942 psi | 56% | 991 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 24,743 psi | 73% | 1293 fps | 94.2% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,802 psi | 20% | 702 fps | 98.9% |
| Hodgdon Universal² | <<locked>> | 60% | 21,567 psi | 63% | 1178 fps | 100% |
| Lovex S011² | <<locked>> | 60% | 27,050 psi | 79% | 1230 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 20,378 psi | 60% | 1168 fps | 99.7% |
| Maxam CSB 1² | <<locked>> | 60% | 16,723 psi | 49% | 1056 fps | 99.9% |
| Maxam CSB 2² | <<locked>> | 60% | 17,898 psi | 53% | 1106 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 19,624 psi | 58% | 1106 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 21,248 psi | 62% | 1115 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 23,946 psi | 70% | 1119 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 25,237 psi | 74% | 1286 fps | 99.1% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 23,598 psi | 69% | 1198 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 6,237 psi | 18% | 686 fps | 94.6% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 15,882 psi | 47% | 1099 fps | 98.1% |
| Rottweil P 801² | <<locked>> | 60% | 27,398 psi | 80% | 1220 fps | 100% |
| Rottweil P 806*² | 10.6 gr | 72% | 16,592 psi | 49% | 1194 fps | 88% |
| SNPE Vectan A0² | <<locked>> | 60% | 17,158 psi | 50% | 1076 fps | 96.9% |
| SNPE Vectan A1² | <<locked>> | 60% | 21,176 psi | 62% | 1138 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 20,349 psi | 60% | 1135 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 25,324 psi | 74% | 1099 fps | 100% |
| SNPE Vectan BA7 1/2*² | 6.5 gr | 60% | 14,286 psi | 42% | 1020 fps | 86% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 20,001 psi | 59% | 1138 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 64% | 20,363 psi | 60% | 1257 fps | 87.6% |
| Somchem MP200² | <<locked>> | 60% | 20,624 psi | 61% | 1188 fps | 98% |
| Somchem MS200² | <<locked>> | 60% | 19,131 psi | 56% | 1135 fps | 98.8% |
| Somchem S221*² | <<locked>> | 64% | 25,106 psi | 74% | 1316 fps | 86.3% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 15,882 psi | 47% | 1096 fps | 89.4% |
| Vihtavuori N105* | <<locked>> | 96% | 24,366 psi | 71% | 1371 fps | 87.1% |
| Vihtavuori N320² | <<locked>> | 60% | 22,118 psi | 65% | 1145 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 10,936 psi | 32% | 850 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 20,059 psi | 59% | 1161 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 17,767 psi | 52% | 1112 fps | 97.7% |
| Vihtavuori N350*² | <<locked>> | 60% | 13,605 psi | 40% | 1027 fps | 87% |
| Winchester AutoComp ² | <<locked>> | 60% | 17,376 psi | 51% | 1089 fps | 99.7% |
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 9 powders for .38-45 ACP loaded with the .358 | 120gr | Rim Rock TC Cowboy. Rottweil P 806 delivers the highest muzzle velocity at 1,453 fps; across all powders the maximum-charge window runs from 955 fps to 1,453 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 9 of the 9 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (235 MPa), the top charges use 39–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N32C Tin Star 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, Alliant Herco, SNPE Vectan BA7 1/2 rank at the top here: for .38-45 ACP with the .358 | 120gr | Rim Rock TC Cowboy they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AP 100 burn incompletely and react more sensitively to barrel length and temperature. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N32C Tin Star 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.