Thanks fellers My action is a clip model it has V threads 14 to the inch I dont have a barrel for proto type. My measure, I come up with.947 from action face to collar, .899 from action face to bolt face, .836 to the tops of the action threads and this is the one I could use some help with about .906 to the bottoms. I got this last # form the small counterbore in front of the threads. But the counterbore may be deeper than the bottom of the thread. Thanks again.