Bob, I haven't had nearly as many M 70s as you so I understand the %.
All of my 70s are/have been XTR or later NH. My Black Shadow I don't think is an XTR.
I have had great accuracy from every one. I mean 1" or less with handloads. Once I get any rifle shooting 1" or so, I don't look for 'target' accuracy.
Also I count myself very lucky.... with 70s AND 700s I have not had ONE of the 'common'(?) problems.
Jerry
