Thank you, bushveld, for that informative post. This gun may well have been made out of square, it may have been very slightly off face on the right barrel when I bought it, or it may have become out of square due to shooting the right barrel so much more than the left. Whatever the cause, it is indeed off face now, on the right side only. I will try to make the time to see if a hook/pin shim will allow it to close, but I will be surprised if it closes up the .004" gap at the right barrel breech completely. 'Twill be interesting to see, tho'.

I know it is still safe to shoot, but I just don't want to do so anymore until it is put back on face properly. More reports after I try some more shimming.

SRH

May God bless America and those who defend her.