Now here is why if you are using a narrow double bevel you should switch to a single bevel IMO
Compare the typical single bevel hole here:
To the typical double bevel hole of the same outside diameter broadhead specs (this was a proven name brand broadhead which shall go unamed but has been around for decades):
Entrance:
Exit:
Are you playing where's Waldo? ...me too and you can bet the blood trail was a where's Waldo trip too. Single bevels offer a slight penetration advantage but they also open a bigger whole for recovery.
Of course they all kill just as humanely and all these animals died with so little pain that all not one of them stopped and began resuming activity before succumbing within seconds...that is a good feeling for any avid bowhunter!