Great input Joe and Rich! I've been working with Don on this and it looks like we are going forward with the attempt anyway... Here is how I see your concerns, and how we plan to overcome the possible issues noted?
First, our liners will be .500" dia. at the chamber, and progressively reduced or stepped down as we get toward the muzzle.
Second, although .0015" sounds like a lot of clearance, and it might be over the thickness of a washer, but over approximately 5" it is pretty tight? Also, a glue starved bond is possible with an overtight fit?
Third, the shrink fit would be great, especially for a production set up and perfect & clean, 100% concentric parts, our repairs will not quite reach this level of sophistication? Plus, the shrink fit is a one shot deal... No second chance.
fourth, I think the concentricity appearance can be achieved by drilling or reaming from both ends, muzzle end first, chamber end until break thru, then reamers from there on out?.
Fifth, Loctite will be easy to work with, and also permanent! And still resist heat well past high 300 F.
Please note, one thru five are starting points, we are thankful for the suggestions and direction replies from our machinist brothers! Our full circle journey may end us up, right back to the members suggestions noted above...
More soon, best to all, til….lat'r....GT