Buck442, shooting 6 grains per pound is more than exceptable on your bow. Most hunters today drop down to the 5 grains per pound without faults. You won't have any problems with this setup but I am concerned that you bought a 70.8 lb Tribute and have back down all the way to 60 lbs. I assume you want to work into more poundage or why didn't you just purchase a 60 lb bow?

You have a real nice set up, congratulations and enjoy.