The 270 seems to be one of the more easy guns to get to group really tight..but it is a long action. I been shooting the 7mm-08..love the recoil and the groups....its hard to go wrong with the 308 family. Have shot a 7mm mag that grouped extremely well all day also. I think its more gun and shooter than caliber. Although some will always stand out. I can also vouch for 222 accuracy....will shoot same hole almost all day.