Mike Matteson
Well-Known Member
I have a 220 Swift, If you are running 45 grain bullet at 4200 fps. Yes you will burn the barrel out. Slow it down by using 55 grain Sierra Spitzer @ 3900 fps will increase the life of the barrel by a bunch. I feel that the 55 gr. does a better job. The load is Rem 9 1/2 primer, 39 grains of IMR 4064, with the 55Gr. Sierra Spitzer. That's per Sierra Reloading manual Copyright 1971.