Quote Originally Posted by steve medlock View Post
So it looks like the calibre is either .44 or .45 depending upon whether you measure across the lands or the grooves.
I reckon it's more to do with semantics! It's only in the UK that they are anal about "calibres!!

No doubt more to do with ball size required as ostensibly, they are .44 cal in the traditional sense.

Try having a Ruger, R&S and Uberti.. .457", .451" and .454" balls required respectively!..... so really, all .45 cal!