I was considering this gun for my 13 yr old grandson to use. He is about 5' 6" and weighs 150 lbs but is new to shooting. He harvested his first deer this year with his mother's .243 (His mother, my daughter, is an excellent shot and harvested a 5 X 6 bull elk this year @ 300 yds) I was considering a 7mm '08, a .308, or a 30 '06. Would get a muzzle brake with any of these. Thanks Ray