I took a big disk drive from one of the old computers where I work...put it up as target practice because I heard stories of how cool it looked pierced. Walked 10-15 paces and handed my Pop a .454 pistol \:D He hit it dead on, but didn't really care to take another shot ! I was amazed at all the small platters fragmented for about 20 seconds, then tossed it in the trash !