I recently acquired a Bowen conversion of an OMBH to 25-20. Bought it used and no idea why someone would pay to have the conversion done and then get rid of it...but now it is mine.
Have been trying several different powders with an 85 gr. cast bullet from Badman Bullets. Biggest problem (and I knew this was possible with the bottleneck case) is cases setting back after firing and preventing the cylinder from turning. Tried some fast powders like Green Dot and Unique, then 2400 and now H-110. 8 grs. of H-110 works pretty well with minimal case set back and easy extraction. Might up a few tenths to see if works better. Have been concentrating on easy cylinder rotation rather than accuracy at this point, but want to keep trying.
So, any other ideas out there? Powders? Bullets?