Why do you need new shells ?

Did you pattern the ones you have with your "new" choke yet ?

Personlly, I think a lot of it is waaaay over thought.

I have a Beretta Extrema2 (my waterfowl gun) with a extra full extended turkey choke (right) & I shoot 3.5" Remington #4's and I kill long beards every year DRT !

Just call them in close & kill'em - no big !!!