RE: bisker wisket
For hunting, you can't beat a WB. For target shooting, probably a drop away.
The downfall of the bisket is it likes to rip off fletches.
My fix was 2inch blazer vanes and good glue. The glue you get with factory arrows is real cheap, and the Blazer vanes are a bit stronger material than traditional vanes. Never shot them with feathers, but for the little bit of trouble they are, the thought of never having my arrow fall off the rest while I am in my treeestand ever again?*tink*... Priceless.
As far as groups? 2 inch at 25,4 inch at 50(might be the shooter)