I am looking for a reamer that will allow me to use 178 eldm and 175 SMK close to the lands (20 thou) while being able to feed from a magazine max case length of 2.9 (2.875 to be safe). Through reading many forms I think I have decided on 0.090" freebore. Does this sound right? Also just for my own curiosity what is SAAMI freebore?