A phone book target works against the concept of the Glaser. The bullet is copper jacket with lead shot ( #12 ) I believe, with a teflon nose. It penetrates as long as it meets solid resistance, when the resistance is taken away, the lead shot comes out of the jacket and puts 100% of its energy right then and there, massive wound at that point. It works well on a body, especially center mass hits.
But when fired through a door, or wall, it peppers the other side with little effect, same thing with car doors or glass.
On the phone book, it was always meeting solid resistance. Not the best round for outside the home IMHO, but useful indoors, or aircraft. I keep them loaded in my 2 1/2" S&W 19.
Get a free turkey this holiday season, thaw it out and shoot one into it, I think you will be impressed.