Plywood plies?

I was loading up some scraps of plywood last night and it brought on this question. What type of 3/4" plywood should I ask for that will have the most number of plies?
I'm looking for 4x8 sheets so baltic is out. Last night I counted 11 plies on one piece os scrap, 7 plies on another and it seems like the ACX that I used on the floor of my utility trailer only had 4 or 5 plies. I also need it to be exterior grade for my new side walls. Any help?
Thanks so much.
Mike
I'm looking for 4x8 sheets so baltic is out. Last night I counted 11 plies on one piece os scrap, 7 plies on another and it seems like the ACX that I used on the floor of my utility trailer only had 4 or 5 plies. I also need it to be exterior grade for my new side walls. Any help?
Thanks so much.
Mike