I have been trying to get set up to do my own chamber work and think I am finally there. I have a rem LA mag boltface action that I trued up and am pretty pleased with the results. I have a .308 barrel that I bought on the forums here. I am considering chambering it in 300RUM as I have the reamer handy are there any special considerations regarding taper? There isnt a lot of straight before the taper begins on this barrel.