On Thu, 08 Sep 2005 17:25:48 -0700, Eric R Snow wrote:

The back end of the barrel is indeed chamfered.

I must point out that this chamfer is very important.
It is called a "forcing cone" and does indeed guide
the projectile into the barrel. I would hesitate to
tamper with it too much.

I read your response to my comments, and I'm still
concerned about that cylinder. From your description
it sounds like the rims of the shells are touching the
back of the frame and therefor are taking up the play,
forcing the cylinder forward. That sounds potentially
very dangerous given that these are rim fire shells.
If the pistol were to be dropped in such a way that
the front of the cylinder was struck there is a chance
that the shells might detonate.

I still think that the main problem is in the play in
the cylinder, and that as DoN says, there may be a worn
bushing at the back of the cylinder (or it could be a
design flaw or other defect from the factory).

I wish Jack Erbes was here! He'd know for sure!

P.S. Have you asked on rec.guns yet?