my one cousin has been hunting with a Remington 700 in 300 win mag and has been dropping deer everytime he squeezes the trigger. he shoots 165 grain bullets out of his. not sure how much powder he loads but he uses IMR 4831. needless to say it has the power to kill deer at most any range here in Pa. ive seen him drop deer at 400 to 500 yards with his rifle. one thing i know is his loads are close to max.