You can use N540 for hunting if your round count won't be much. Shouldn't cause barrel problems. But if you intend on lots of target rounds downrange, hhhmmmm........ The 500 series was developed to squeeze a few more fps out of each type. In that regard they achieved their goal.Oh sweet! I got 8lbs of the 2nd hottest one on the list! I get to try the next barrel contour soooner than later!