Well because everyone has been so testy here lately let me first say I do not care if you or anyone else shoots lead, hevi, TSS, #4s, or #9s. They will all kill birds everyday. I would bet more birds are killed each year by #4 and #5 lead then all other shot types combined.
I personally will only shoot Hevi #7s. I like to put a pile of pellets in the birds head and neck, even though it really only takes one I like a pile of them. I shoot a 870SM with Hevi 13 3.5" 2.25oz #7s (the past 3 seasons, 2014 I plan on shooting Nitros, got my order in yesterday so hopefully they make it in time). My best pattern to date is 324 pellets in a 10" circle at 40 yards.
I don't like shooting much past 40-45 yards but mistakes happen. Case being last year I while hunting a field bird in the rain I thought the bird was 40 maybe 45 yards away so I shot, he was coming closer but I thought he was where I wanted him so I decided not to wait. Turns out he was at 55 yards. That bird dropped where he stood. After looking him over I realized the shot actually broke one of this wings. This shows me no only will the Hevi shot #7s give me the numbers I want but they can also break bones when mistakes are made.
If I said anything to upset anyone please PM me and lets not turn this into a 5 page bashing or argument about why anyone would shoot pixy dust at a turkey.