im gonna say any 700 with factory ammo should shoot 1 in 3 shot groups, with alot of the 700p or tactical /varmit heavy barrels shooting 1/2 in or less with fed goldmedal match ammo or any match ammo. as for caliber? I guess thats personal preference. 308 is probobly the most liked here. but all 700 's will shoot better than most anyway.