My best 00 buck load. New cheddite 3" hull and primer. 29 gr 800x. clone Federal S3 wad firm over powder. Buffer in bottom of shotcup to cover. 5 stacks of 2 Hard Lead 00. more buffer shaken down until even with top stack. 1 thin fiber patch to hold buffer. Fold crimp.
What makes it work: HARD lead shot. Picked this up from Roger Dat on s&s. Excellent shot! He may have more. Stack of 2 allow least tumble and friction out of a full choked barrel. Moderate speed, about 1350 fps.
This pattern at 40 yds is what makes it pretty...7 pellets in a 10" circle with much energy. Load is 518 gr lead, 1 1/4 oz. with buffer. Recipe from BPI cheddite manual for 1 1/4 shot with wad change. Printed load of 30 gr. 800x a little sticky.