Bow with a turkey? I've never tried that, I guess if you threw the turkey at the bow hard enough...haha just kidding, I would imagine 30 lbs would kill a turkey, but I would try for more then that just for good measure. If you are shooting low poundage I would stick to a cut on contact broadhead as well. I don't think I would be real ethical to try to take a turkey with a pellet gun. A turkey shotgun shell throws several hundred pellets at around 1300 fps (give or take) and it takes several of those pellets in the head or neck to put one down. Turkey are big tough birds and they take a lot of killing for an animal their size.