beladran, I'm a bit confused on the COAL. I was getting the Rifle Seat Length for the encore barrel, which turned out to be 2.66, and all book COAL are all over the place. Some say 2.50, another shows a min. of 2.53 to max of 2.56. If I follow what is in my Nosler book, the COAL for that barrel will be 2.63. Does this only work on shouldered rounds and not straight wall rounds?