So I recently found a .38-40 / 10mm Buckeye Blackhawk for a price that I didn't consider to be excessive. I've been reloading a lot of calibers for a lot of years, but this is the first time I've loaded the .38-40. I've been having a tough time getting that one to shoot very well at all.
In comparison, the 10mm shoots very well.
I finally started measuring cylinder throats. I have been measuring by driving a lead bullet through the cylinder and then measuring with a micrometer. The throats all measure .3990" and ..3985".
The one 10mm chamber I checked measured at .4005". The way it runs, I expect them all to be around the same.
So is there a go-to gunsmith for throat reaming? Anyone out there that would have a correct .40-caliber throat reamer?
In comparison, the 10mm shoots very well.
I finally started measuring cylinder throats. I have been measuring by driving a lead bullet through the cylinder and then measuring with a micrometer. The throats all measure .3990" and ..3985".
The one 10mm chamber I checked measured at .4005". The way it runs, I expect them all to be around the same.
So is there a go-to gunsmith for throat reaming? Anyone out there that would have a correct .40-caliber throat reamer?