Re: 6.5-284 Shehane?
It has a 40* shoulder, body taper is moved from .501-.473" to .501-.486", has .166" freebore with a 1* leade for 60mins. This was one of the older prints I saw. Bill Shehane does this to shoot 140 bergers and 142 seirras at 3050fps from a 29 and 30" tube with minimal effort and exceptional case life, is does not have a worthy advantage for a normal shooter using 130s. You cah get 3200+ with 130s in a standard 6.5x284 with a 28" barrel and have good case life.