Trying to get back into this project. Weather, and little heat in my shop, not helping. This is a pic of my mini lathe set up with barrel 1. I have two 26", .300 win mag, 700 bbls. What I will do is start turning down the bbls to about the monoblock diameter, yet to be determined. I will cut the bbls off through the neck, about 2" +/-, Right now the monoblock is bored to 5/8" I will probably be going to about 3/4". The object is to leave as much barrel 'meat' as I can. With a small lathe, I have to chuck the barrel's threads and use a steady rest. No matter, that whole part will be cut off. Ultimately, then ream the remainder for 30-40 Krag. It's now 'dialed' in at about .003.