...Heh heh heh.... First let me say " Super group" !!!!! [:-] Very very impressive. Just think what you could do with " good" arrows!
I am always amazed how we tune, tweak, test, and generally try to get better...sometimes to our own hurt. Sometime ago I was testing broadheads through the chrono at fifty yards so I could see the actual results. I know a guy can plug into a program and get reliable results, but what kind of fun is that? I ended up ruining a few arrows and with my last shot clipped the reflectors on my chrono. The white plastic pieces above the chrono when sliced in two stood up and parted like the red sea. From my vantage point the arrow never appeared to go of course. It was cool to watch (I guess you had to be there) but that little experiment was sure hard on the equipment.
Nub, a fingers shooter that I met in Colorado and hunted elk with one afternoon last year claimed he " double hooded" one time. I didn' t see it obviously so I can' t verify it. I' m sure it has been done...however never by me.