my newest rig is a 6XC with a 20" barrel! I get 3050fps out of the 105 amax with 35.7gr of re15. this is a stout load but not hard on brass. the 6XC is very easy to form from 22-250 which is what I use or you can buy good norma brass for $75 per hundred. aside from the 6BR and 6PPC, this is the...