In the thinking stage of a 300 RUM rebarrel project. I have a Savage 111 in 300 RUM, w/26" sporter barrel 1:10 twist, that I'm thinking about upgrading to a custom barrel. It shoots about 1 moa with 200 SMK handloads, but heats up extremely fast. I'm hoping a bull barrel will do 3 things - allow me to fire more shots before getting the barrel to cooking temperature, be a little more resistant to vibration, and add a little weight to reduce felt recoil. I like the 200 gr SMK's, and would like a twist to work with these bullets. Looking for opimions on twist rate, # of grooves & lands, and barrel length, and barrel contour. My intended use is an "over the top" varmint rifle (I want to kill groundhogs deader than my 22-250 does ), and long range paper puncher.