I agree with JW. The closer the better. Take a few shots with your preferred turkey load and see how it patterns at different distances to get a good idea of how far it looks like would be a good shot then try to keep it under 5yds or less (if it patterened well at 35 yds keep your shot distance at 30 yds or less) of your furtherest you feel it patterns well. First shot is the one that counts cause it could be your only shot!