I would start with the H-13 #7's. They are easily available and cheaper. Buy a box and try them. You may be surprised. If you don't like them, then go Nitro. Try not to get caught up in this numbers thing. It gets to be an obsession, and guys are moaning about patterns that will smoke a bird, everytime at 50 yards, because they had 40 more pellets last year. Don't let it get you crazy.. It's not that complicated..Just my humble opinion..Mike