I've recently got myself a Pietta Colt Navy and am having trouble with the revolvers locking bolt...
I noticed when at full cock the cylinder could still move slightly for some chambers, but it was quite tight for other chambers, I noticed some burring on the cylinder locking grooves which I have removed, but still finding the cylinder lock a bit slack, I guess this is expected of an old gun.
Upon opening the gun I also found that the locking bolt is a bit slack on its pin, has anyone needed to remove this slack with a brass bush/collet at all?

Gun seems to shoot all over the place for some shots, dead on target on others...

Cheers

Tom