Remington, Savage, Ruger, Browning... all of them make great bolt actions. If they were all in good condition, just get the cheapest one. 2-300 yards would be a breeze with a barrel between 20-26"... Caliber? Depends entirely on you. .30-06, .25-06, .270, 7x57 Mauser, .22-250, .257 Roberts, .243.... endless possibilities. Do you want a purely target round? I'd go for a smaller caliber with less recoil and flatter trajectory. Target with the possibility of hunting... say whitetail, 7x57 or .257 Roberts would be my choice.