Nice entry! I bought some Wausau card stock that took holes better than copier paper, and cardboard (corrogated, cereal box, folder, or even cardstock) helps it further. (Better than a lot of papers I tried, for that matter.) Copier paper can be nasty--the stuff that makes it strong for copiers is longish fibers and processing that causes shots to tear large flaps at times or just make messy "burst" holes. Even some target papers can be fuzzy with wadcutters due to long fibers and weak binder compounds, but a number of different brands of heavy cardstocks seem to do well.
I haven't tried the glued backer, but I should--I've got some spray glue at home.