Several of the younger hunters in our group have shot 20's over the last few years with very good luck. They have been shooting mostly 6's and have killed several big toms. Personally, I don't find turkeys all that hard to kill if, like anything else, you hit em! That big red head makes a great target and the misses are usually buck fever on the part of the shooter. Try to have your gun in a ready postition to alleviate wild last second manuerving and take your time on the shot. Turkeys are great at coming in at the most inopportune time, so be aware of where your gun is sitting-all those little branches and pieces of clothing that fall or get sat on it while your waiting can be in the way jut enough for the birds to spot the movement and be gone!!! Turkeys arent like deer, they won't stand their looking at you after they see movement. Also, let em keep coming!! Sometimes buck fever sets in and hunters will fire away at a bird out of range that is still coming in.