Also there is the possibility of using rifled choke tubes. I havent seen any factory rifled tubes for the Baikals, but a couple of the choke manufactures will make custom rifled tubes. The question remains as to a usable twist for ball and conicals and I suppose sabots. Then there comes the issue of "reg-u-guessing"

Still its an interesting concept for those of us who are still dreaming about REAL Doubles and Paradox guns.