I am shopping for a smith to build my 13 year old son a 280 AI. Should I add a muzzle brake for him? And my daughter is 9, as she grows I may want her to shoot it. I currently have a factory Rem 700 rechambered to 280AI in a HS Precision stock. I don't think there's much recoil but I am 6' 2 250 lbs. The factory gun's action is gonna be donated for the build unless I go full custom. Also thoughts on a stock that I could adjust lenght of pull? McMillan with spacers? I want the gun to end up under 7.5 lbs without scope. Thanks in advance for your thoughts.