[loboslanding]

BATF, tough to help analyze without photos...can you post some??

Do you have the breech block cam installed??

 

[brassmagnet]

If you need to go out 15 turns to get the no go gauge to work, I'd check the barrel for obstructions and crud in the chamber/throat area too. Sounds like there is a problem in there - at 15 turns you aren't even near the face of the barrel chamber. Just a thought.