A guy I know says: "Friends don't let friends shoot #4 lead for turkeys"
There's alot of truth in that statement. I've never seen a good pattern with #4s.
In the 835 I'd recommend the Pure Gold, Indian Creek, Primos Jelly Head, or the discontinued Star Dot if you can find one.
If you want the best patterns available with a turkey set-up and factory ammo, try H13 #6s. They carry more energy than #4 lead and pattern better than lead period. If you want even better patterns, buy Nitros. The only thing better than Nitros are handloads.
These are 40yard patterns with an 835 shooting handloads and a Star Dot .676 choke tube(10" circle counts):
2.25oz of 6 hevi shot:
2.25oz of #7 hevi shot(power of #5 lead):
Nitros will not come close to those, but they are the best available shell to the public.
Good Luck
Reloader7RM