I think 50 yrs is the longest Jeff. Not a hard shoot and they are supposed to look at form and Range Safety at time of shooting. Long shots with 870 were hardest for us. Those Ghost sights are good but I like rifle sights better. It is a lot more of a nerve game than shooting skills I think. A lot of people let that shooting part get into their head and mess with them. Always tried to teach him, Just stay cool and shoot.