I have always wondered about this: Specifically, this seems to be a process that most owners take very casually. And yet, I ave read that to have it done by an ameteur- opened up by grinding from the muzzle can lead to a botched and uneven pattern. That it should be done from the chambers so that the new muzzle is concentric. Also, in very small amounts with testing in between. that one can ruin a gun if done poorly. How does one choose a smith who will do a good job? do any test pattern their work? Thanks! Robert
