I have a 300 WSM Kevin [Montour County Rifles] built me on here. It is DEADLY accurate with the Barnes 165 gr factory loadings. It that bullet good enough for bull elk out to 400 yards? I would think it would be fine ,but want to get some opinions from some of you that have killed more elk. I hate to go change things up ,but would be more than willing if I need a heavier bullet. THANKS!!