My outfitter told me the same thing. Im not sure about the 7mm as I bought a 300 win mag for my hunt. I found that 165 gr hornady superformance shot very nicely in my gun. I sighted in at 350 yds and went to handloads.com and printed out ballistic info. It told me I would be 26" low at 550 yds. (6" high at 200) When i shot at 550 it turned out to be about 24 1/2" low. My shot came at 437 yds which meant i needed to hold high up on the body but not over. It was a one shot kill with the elk running less than 50 yds leaving an easy blood trail.