I have disassembled a new H13 #7 and old. The new wads are very quite different. My ? is has anyone taken a proven combo with the old lots and found if the new stuff likes tighter or more open chokes as a rule? Maybe a choke change can get people up to the numbers they were getting. My gun 870SM/ PG670/ went from 290-300 last year to around 250 this year. I know it is still good but who wants to go backwards. If someone gets 20mpg and now gets 15mpg one would probably try to get it back up to where it was.
can you post pics of the old and new wads?