You can argue with the CFO all you like about ballistics but it's a waste of time when the NSSA/NSCA range guidelines specify a 300 yard shot fall zone. As well, while clay ranges limit shot size to #7.5 it's not all that unusual for some lunkhead to come out to the club just before duck season with a box of 3 inch #2 and bang off a few until someone (hopefully) reminds him of the rules.