A .284 Win or Shehane in a 21 pound rifle does not recoil hard. I never even think about my Shehane when shooting it. I'm running 180 Hybrids at 2940-2965, depending upon which barrel is installed. It is very pleasant to shoot. [br]
While I have shot well with a 6BR at 600, it was not in stiff winds. If the wind is 10 mph or higher, I do not shoot the 6BR. Errors simply cost too much. We shot a 3X600 at Camp Pendleton Saturday in 10 mph winds with let-offs to 5 and gusts to ~14. My Shehane shot 599-29X. The one dropped point was a centered shot, 1/2" low on first relay. Go figure. I don't think I would have shot that score with my 6BR Viper SS. The Viper is more accurate than the Shehane and nothing to shoot well. But, in wind, it can't compete with a .284. [br]
Also, if you ever want to try 1000 yard shooting, you are already equipped.