Ok, after talking to the guy here's what I know. He said they changed out the barrel and checked everything else. All else was good to go. And for good measure he tossed out all the technical terms to back his statement, thec smeck I don't care just make it work as it should. I knew barrel had been swapped as I had put a small witness mark on bottom (trick I learned dealing with Rem), doesn't take much just small dot from a center lunch that only you know about. I have ran another 50 rounds thru it and all is still well and I am really starting to like this one. I have a new unfired M25 setting in corner in 17 H that I will now start on, am praying its good to go as I don't have much hair left to pull out. Have plenty of factory stuff for the brass and will be able to tell pretty quick if its staying or going, I don't want to go this road again. Happy now but there were moments of pure disgust with it.