My dad use my 870 Mag, I used my new to me 870 SM to kill this tom. I used 3.5" #7 HeviShot with a .670" SumToy choke. The bird was at 40 yards. I put the sneak on him so the shot was a little rushed and I believe I hit a little low. I did aim where the neck meets the feathers. At that shot the bird dropped like a ton. He did flop a few times. The shot broke his neck and the wing that was facing me and some of the shot went into the breast and body cavity. I did not have to stand on his neck at all.