Maybe I'm crazy, but it looks like you can tell which packs have the hits because they're visibly thicker... maybe I've been awake too long... but I'm putting those ones aside in the hopes for a big finale, lol!
I busted alot of these earlier this year, packs were various thicknesses, but it didnt really indicate anything.
Good luck with the last four packs, i have a heap of dupes if your looking to do some trading