I am looking to make a simple and quick backstop for target shooting with a Beretta 92FS, (425fps) and am wondering if it makes any sense to simply stick some high density styrofoam to plywood? Or would the styro get mangled in no time?

I don't want to spend a lot of time or money, just to make something to pin my paper targets to. I am open to any/all of your suggestions!

Thanks,
Glen B.
Fogo Island, Newfoundland