Greetings My Good Black Panther -
Welcome to CASCITY
Why don't you stop over here
http://www.cascity.com/forumhallto check out the rules etc,
then introduce yourself ?
I am quite sure the moreknowledgable folks will stop by shortly, but in the meantime I can safely relate that
the old, original 44-40's were designed for the smaller .427 bullet old style hollowbase pure lead bullet.
Your lands and grooves dimensions sound pretty darn good for an original and I sincerrely hope it WON'T chamber anything larger than .430
The big question is , what sort of accuracy are you getting now?
just afew threads down in this child forum you can find Bryan Austins excellent 265 yard results with the 43-214A bullet ( A custom mold I believe) seen here
hopefeully more folks will stop in and reply in between holiday "doings"
yhs
prof marvel