Dave, can I be perfectly blunt with you for the purpose of helping you out? A modified choke will never deliver the pattern you' re looking for in a turkey shot. The only way you' re going to get the desired pattern is by going to a extra full turkey choke with either #4,#5, or #6 shot in 3" shell. I like #6 because it delivers more shot to the target, but many people like the 4' s and 5' s. Once you get the extra full choke, try at least three different namebrands of ammo (Rem, Win, and Fed?) and try all three at different distances. Maybe 20 and 30 yards. Don' t be discouraged! It took me almost four years to finally figure out what works for me.