Okie pokie, now I'm getting somewhere. I already know my groove diameter, as stated it is .426+ and my chamber diameter is .434+. I use to have access to a 427098 mold that dropped bullets in access of .434+, but not anymore. I currently have a 429421 mold that drops bullets that kind of fill the chamber, I can push them thru manually with little effort. I would like to get away from this size difference. I could have someone rechamber a .357 cylinder to .44 spec. with chamber at .430 and then have the new cylinder adjusted to my hand and bolt etc.
I thought if I could ream the cylinder myself to .451, or 2 and screw in a .45 barrel I would be done with this pain in the pooper problem. So, what special tools do I need to unscrew/screw in a barrel? If it is too much for me to do the barrel myself, I could send it to someone, but rechambering the cylinder is within my capability if someone would tell me what I need. Thank you.