Well it's a give and take choice. 5's is out of the question since your going to have way less than even 80 hits in the 10" at 50yds. A great shoting shotgun and choke might muster up 80 hits in the 10" at that distance with a Hevi-13 5 load. But that's a big might. I like the 7's over the 6's due to the fact that both of my turkey guns pattern the 7's so much better than with the 6's. On the 835 I can go from 180 to maybe 200 hits with the 6's to 300 hits or more with the 7's. That's a huge difference from using the exact same weight load. So that is why I use them. I have seen the destruction at 50yds that a 3" 2oz load Hevi# 7's will do. And really 50yds is about as far as I care to shoot one. 55yds would be about the upper limit I would want to push it to lethally kill one. And that's getting out there a good ways when you lay the tape measure for someone to consistently kill one.