The 300g SMK works good on whitetail deer. We have a crop damage permit on a large farm here and I am one of the shooters last year we shot 27 deer most with the 300g smk ranges were from 100 yards to 780 yards. The only problem is meet damage. In a hunting situation I have used the 300g SMK to take elk and deer from 10 feet to 2040 yards.