I pretty much agree with Matt/PA.

I am almost to 100 bow killed deer, between whitetails and mulies. Probably 75 of them have been square through both lungs. I have yet to see one shot like that make it 50 yds.

Had a couple that I thought were hit right that went for quite a distance.
Funny how that arrow does not always hit where you thought it did!

I would guess my average for double lung hits is about 30 yards.