if you think about it....the 3" shells havent been around that long...everyone shot their turkeys with the 2 3/4" for years...my guess is he will too...best thing for him to do is get a couple of boxes of turkey loads and see what works best from his gun..wingbone is correct about the pattern of fours and the shot capacity of sixes...either way he'll he should be able to reach out there to thirty yards without a worry.