there are varables in loads , chokes and guns as you know. that particular combination may prefer 5s and 6s may not pattern worth a flip. the only way to know is get a box and shoot them at a pattern board. they may end up performing better. the constriction of the choke may be too open or too constricted. try them and see. don't just buy them and assume because its more pellets in the 6 that its going to be better. definitely try them before hunting with them.