Thanks Foster, I'm merely a jack-leg machinist but Glenn is the true genius with toolmaking.

I just went back & reread portions of Harold Vaughn's great book Rifle Accuracy Facts and want to share a few more thoughts. I had read this book several years ago, back when it was first printed, and had even re-read portions of it since then but had forgotten a lot of it. It's a wonderful book written by a dedicated benchrest shooter who is also a bona fide rocket scientist out in New Mexico at one of those facilities. Vaughn writes in a clear concise style that's very understandable to another shooter and also very readable considering the occasionally arcane math & jargon, and his points are well-made & his experiments were done in an impeccable manner. And what experiments they were!

Among other accuracy-affecting conditions, Vaughn isolated and experimented with the effect of the barrel threads actually moving within the receiver during the action of firing. Yes, that's right, he found that under some fairly common conditions the barrel's conventionally-cut threads would actually fail to prevent movement of the rearmost part of the barrel's threaded shank, resulting in the barrel assuming a slightly different position after each shot. Sad but true, and illustrated in the book by some convincing photographs as well as some corroborating mathematical formulae.

To make a long story short, Vaughn details three methods used to solve this problem but unfortunately he didn't try the (fourth) Loctite method. After reading what he had to say on the subject, IMO Glenn's Loctite method would address all Vaughn's issues and take care of any incipient problems in this area. I intend to use it in my own work from now on.

I can't praise this book as highly as it deserves. IMO every single accuracy-minded rifle builder should have a copy and read it several times, I get something new each time I go back to it.
Very interesting discussion indeed, Joe

Good morning, hst & Joe;

I don't know if the gentlemen here appreciate y'alls discussion, but I do!  Material for thought.  Need to practice sometimes.

Y'all be good.

horsefly