I like to use old catalogs myself. I have plenty of old Cabellas' and Summit racing catalogs that are pretty fun to whack on. I like to start slicing from the spine, and seeing how easily it cuts in half. Phone books are usefull too. They are a good backstop for throwing knives, and as an indoor air rifle backstop.
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"No, it's a Vaquero Grande in my pocket, but I am happy to see you!"