Any broadhead used for deer will work for turkey but this is where I feel a good mechanical really works.
The ideal shot on a turkey is when they are in full strut and facing away from you. Shoot them right where the tail feathers come together...Texas heart shot you could say.This also allows you to draw because their heads are behind their fan assuming your not in a blind. Also at full strut and facing you, you want to shoot them just above the beard but be careful not to shoot the beard off.

When the bird is sideways to you in strut or not you want to nail the wing joint and if your good enough, a neck/head shot will put them down quick.
If you get a chance to study a McKenzie full strut turkey target, the ten rings are pretty much dead on as well as it's upright jake target....except on angles....keep that in mind and good luck.