I've killed several turkeys with Pb 7.5s @ 1200 fps from the open barrel of my O/U, and I consider 35 yds to be max with that shot size (although I know several folks that say they work fine @ 40 as well). Lead 7.5s drop below 1.25" of predicted ballistic gel penetration at 35 yds. Anything any further than 35 yds gets a face full of TSS 9s.