Bought some 20/28 during the recent shortage of Universal. Don't much care for it using Win CF 20ga hulls and thought I might try it in 28ga using CF AA hulls. Only data I find is for 28ga HS. Will be using Win 209 and CB wads. Thinking 13gr, but thought I might poll the experts as pressures are pretty high even in data for HS hulls. Not much room for error. Thanks in advance for suggestions.