There is no law that says you have to use a short action Remington to make a target rifle.
If their is, then the Army is in trouble, the M24 Sniper system is made on the 700 Long action, it uses a 308. They tend to shoot pretty good. Its the Marines that went to the short action.
CPT USAR Ret
USAMU Sniper School Oct '78
Distinguished Rifle Badge 1071