I haven't used the battle axe, but shot a doe a couple weeks ago with the Big Game Broadhead, single bevel. The shot was through the lungs, the doe trotted off about 30 yards, stopped for a couple seconds and fell over dead. The head cut off a rib on entrance, and went between two at an angle on the exit, cutting about 1/2 into both of them, stuck in the ground on the far side. Couldn't ask for better performance.
I did shoot a buck that dressed 195, through the shoulder blade and into the spine with a Simmons Tree Shark, which is basically the same head as the Battleaxe, and it worked fine - busting right through the shoulder blade - but them I'm shooting a 67#@29" bow with a 710gr arrow. I would suspect the wide head would limit penetration on bone with a light arrow or bow. I think they would be an absolute incredible head on turkeys.
By the way, I found them to fly great, a little difficult to sharpen - I use a 1/2 round file and a round ceramic stick.