I got a Bartlein blank and am going to be threading it next week for 6.5CM. I have the older small shank action ('97 10FP). Looking for any info from anyone who has done this before. I found that my action is threaded 1.055x20tpi. Being that its an oddball thread do I just turn it 1.055 and thread or should I go lower like most threads listed in the Machinery Handbook? I plan on measuring the factory barrel when I get it off to reverse engineer and thread some steel to make a plug gauge but I'm looking for a place to start so I don't waste time. Any help is appreciated.