If you are slow with a bolt gun it is because you have not practiced. Go to Gunsite and take the general rifle class - you won't be screwed again if you miss the first time (which you likely wouldn't).
BTW, there are AR uppers in .30-06 (Cobb).
BTWII - see someone with a vest - shoot them in the head. Or shoot them in the leg and then shoot them in the head.