I have tried several different procedures for breaking in a new barrel. The one I now use is to clean the barrel shoot one round clean shoot two clean shoot 3 clean till 5 shot group then shoot 3 five shot groups with cleaning inbetween groups. I use a sieera bullet usually about mid weight in grains for the caliber and a mid to low weight powder charge to form the brass for the new rifle. After that I can neck size the brass and start to work a load for what ever bullet i want to shoot from the rifle. Any suggestions for a variation or does this sound good ?