Okay, now you're just trying to save face. I've already said firepower is the airgun's weak point.
Why you would care about that, only needing one head shot and all, I've yet to figure out. But hey, party on with your bad self!
Frangibles in a deer's cranium scramble their brains pretty good.
Why you'd give up follow-up speed and availability of ammo varieties is beyond me, but it's your choice.