Hi Guys, thanks for all, I'm going to measure out a few things before I proceed... But, it's not at the flange area where the interferance is occuring.. it's at the very most back part of the barrel bottoming out in the receiver, (at the rails??) So, it would appear that the receiver is overall too short... but it doesn't apperar altered???.. Stacking thousands??, or just wrong end of the plus tolerances's??.. Annnnddd, somewhere along the line, I'm going to have to buy or make a headspace gauge... Woe is me....
... but the challenge is eagerly met, ...
... Thanks guys, best to you all, til...lat'r...GT