Load Specifications
Load data in caliber .38-45 ACP with .358 | 125gr | Rim Rock SWC?FB bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Herco, Baschieri & Pellagri 102 Pistol and Vihtavuori N32C Tin Star.
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: 5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 72% | 30,472 psi | 89% | 1316 fps | 100% |
| Accurate Solo 1000² | <<locked>> | 72% | 30,327 psi | 89% | 1224 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 76% | 29,472 psi | 86% | 1273 fps | 100% |
| ADI AP 100* | <<locked>> | 92% | 28,456 psi | 83% | 1352 fps | 93.2% |
| ADI AP 70N² | <<locked>> | 64% | 30,269 psi | 89% | 1296 fps | 100% |
| ADI APS 350² | <<locked>> | 68% | 30,052 psi | 88% | 1112 fps | 100% |
| ADI APS 450² | <<locked>> | 68% | 29,138 psi | 85% | 1132 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 29,965 psi | 88% | 1191 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 29,515 psi | 87% | 1230 fps | 100% |
| Alliant BE-86² | <<locked>> | 76% | 30,835 psi | 90% | 1283 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 68% | 30,284 psi | 89% | 1345 fps | 100% |
| Alliant Green Dot² | <<locked>> | 72% | 29,950 psi | 88% | 1237 fps | 100% |
| Alliant Herco | <<locked>> | 92% | 29,994 psi | 88% | 1342 fps | 100% |
| Alliant POWER PISTOL*² | <<locked>> | 76% | 28,456 psi | 83% | 1388 fps | 92.3% |
| Alliant RED DOT² | <<locked>> | 72% | 28,689 psi | 84% | 1191 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 76% | 28,935 psi | 85% | 1332 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 72% | 29,356 psi | 86% | 1217 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 92% | 30,458 psi | 89% | 1250 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 68% | 28,732 psi | 84% | 1234 fps | 100% |
| Hodgdon Clays² | <<locked>> | 76% | 28,660 psi | 84% | 1125 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 30,284 psi | 89% | 1368 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 15,127 psi | 44% | 948 fps | 100% |
| Hodgdon Universal² | <<locked>> | 68% | 27,920 psi | 82% | 1263 fps | 100% |
| Lovex S020² | <<locked>> | 68% | 28,311 psi | 83% | 1286 fps | 100% |
| Maxam CSB 1 | <<locked>> | 80% | 30,240 psi | 89% | 1276 fps | 100% |
| Maxam CSB 2² | <<locked>> | 76% | 29,356 psi | 86% | 1273 fps | 100% |
| Maxam CSB 3² | <<locked>> | 76% | 30,792 psi | 90% | 1263 fps | 100% |
| Maxam CSB 4² | <<locked>> | 72% | 30,647 psi | 90% | 1240 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 30,705 psi | 90% | 1191 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 64% | 29,820 psi | 87% | 1342 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 64% | 28,224 psi | 83% | 1240 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 13,779 psi | 40% | 945 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 30,356 psi | 89% | 1355 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 30,821 psi | 90% | 1467 fps | 98.2% |
| SNPE Vectan A0 | <<locked>> | 80% | 30,501 psi | 89% | 1312 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 27,615 psi | 81% | 1224 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 72% | 30,327 psi | 89% | 1283 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 64% | 29,124 psi | 85% | 1132 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 84% | 28,834 psi | 85% | 1329 fps | 97.7% |
| SNPE Vectan BA9 1/2² | <<locked>> | 72% | 28,906 psi | 85% | 1270 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 72% | 27,659 psi | 81% | 1391 fps | 93.9% |
| Somchem MP200² | <<locked>> | 72% | 30,516 psi | 90% | 1345 fps | 100% |
| Somchem MS200² | <<locked>> | 76% | 30,516 psi | 90% | 1322 fps | 100% |
| Somchem S221*² | <<locked>> | 68% | 30,298 psi | 89% | 1394 fps | 90.7% |
| Vihtavuori 3N37² | <<locked>> | 76% | 27,615 psi | 81% | 1332 fps | 98.1% |
| Vihtavuori N105*ᴾ | <<locked>> | 100% | 28,718 psi | 84% | 1440 fps | 91.6% |
| Vihtavuori N320² | <<locked>> | 68% | 29,443 psi | 86% | 1230 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 28,065 psi | 82% | 1142 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 30,763 psi | 90% | 1309 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 30,690 psi | 90% | 1329 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 29,573 psi | 87% | 1362 fps | 98.9% |
| Winchester AutoComp ² | <<locked>> | 76% | 28,543 psi | 84% | 1273 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% | 20,827 psi | 61% | 1145 fps | 97.8% |
| Accurate Solo 1000² | <<locked>> | 60% | 22,220 psi | 65% | 1099 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 18,536 psi | 54% | 1083 fps | 100% |
| ADI AP 100*² | <<locked>> | 76% | 18,855 psi | 55% | 1145 fps | 85.9% |
| ADI AP 70N² | <<locked>> | 60% | 27,122 psi | 80% | 1250 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 24,598 psi | 72% | 1037 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 23,351 psi | 69% | 1050 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 22,510 psi | 66% | 1076 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 23,873 psi | 70% | 1142 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 19,392 psi | 57% | 1096 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 60% | 24,047 psi | 71% | 1237 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 22,089 psi | 65% | 1115 fps | 100% |
| Alliant Herco² | 5.7 gr | 60% | 13,706 psi | 40% | 994 fps | 95% |
| Alliant POWER PISTOL*² | <<locked>> | 64% | 20,073 psi | 59% | 1207 fps | 85.9% |
| Alliant RED DOT² | <<locked>> | 60% | 21,292 psi | 62% | 1073 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 18,985 psi | 56% | 1135 fps | 98.6% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 20,885 psi | 61% | 1089 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | 5.3 gr | 60% | 13,155 psi | 39% | 942 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 22,626 psi | 66% | 1142 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 19,406 psi | 57% | 981 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 26,339 psi | 77% | 1302 fps | 95.8% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,121 psi | 21% | 702 fps | 99.5% |
| Hodgdon Universal² | <<locked>> | 60% | 22,118 psi | 65% | 1165 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 21,611 psi | 63% | 1171 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 17,796 psi | 52% | 1063 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 18,565 psi | 54% | 1096 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 20,131 psi | 59% | 1093 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 21,785 psi | 64% | 1106 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 24,540 psi | 72% | 1102 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 26,339 psi | 77% | 1283 fps | 99.7% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 25,092 psi | 74% | 1194 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 6,541 psi | 19% | 686 fps | 96% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 16,926 psi | 50% | 1106 fps | 99.1% |
| Rottweil P 806*² | <<locked>> | 68% | 15,664 psi | 46% | 1145 fps | 87.9% |
| SNPE Vectan A0² | <<locked>> | 60% | 17,564 psi | 52% | 1070 fps | 97.8% |
| SNPE Vectan A1² | <<locked>> | 60% | 22,205 psi | 65% | 1138 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 21,393 psi | 63% | 1135 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 26,585 psi | 78% | 1099 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 15,026 psi | 44% | 1027 fps | 88.1% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 21,103 psi | 62% | 1138 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 18,869 psi | 55% | 1198 fps | 87.1% |
| Somchem MP200² | <<locked>> | 60% | 21,698 psi | 64% | 1188 fps | 98.9% |
| Somchem MS200² | <<locked>> | 60% | 19,551 psi | 57% | 1125 fps | 99.3% |
| Somchem S221*² | <<locked>> | 60% | 23,293 psi | 68% | 1260 fps | 86% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 16,766 psi | 49% | 1099 fps | 91.4% |
| Vihtavuori N105* | <<locked>> | 92% | 22,989 psi | 67% | 1322 fps | 87.2% |
| Vihtavuori N320² | <<locked>> | 60% | 22,742 psi | 67% | 1132 fps | 100% |
| Vihtavuori N32C Tin Star² | 4.1 gr | 60% | 11,414 psi | 33% | 843 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 21,393 psi | 63% | 1161 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 18,855 psi | 55% | 1115 fps | 98.8% |
| Vihtavuori N350*² | <<locked>> | 60% | 14,489 psi | 43% | 1037 fps | 89.2% |
| Winchester AutoComp ² | <<locked>> | 60% | 18,304 psi | 54% | 1089 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 52 powders for .38-45 ACP loaded with the .358 | 125gr | Rim Rock SWC?FB. Rottweil P 806 delivers the highest muzzle velocity at 1,467 fps; across all powders the maximum-charge window runs from 945 fps to 1,467 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 13 of the 52 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (235 MPa), the top charges use 40–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N105 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. Alliant Herco, Baschieri & Pellagri 102 Pistol, Vihtavuori N32C Tin Star rank at the top here: for .38-45 ACP with the .358 | 125gr | Rim Rock SWC?FB they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AP 100, Alliant POWER PISTOL, SNPE Vectan SP 2 burn incompletely and react more sensitively to barrel length and temperature. Accurate Solo 1000, Accurate Solo 1250, ADI APS 350 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.