One dumb on my part, and one joke on my kid bro. My boss asked me to zero in his 7mm mag before he and I left for a deer hunt. Beautiful rifle with and old bushnell scope mounted too far back for a big nosed person like myself. I put the cross hairs on the dot, squeezed, felt the recoil and heard the muzzle blast, but couldn't see sh--. I split my nose wide open. He wasn't even close to zero, but I was done. The next day I told him he was good to go. I heard every wise crack in the book for the next week. I took my kid brother to the range for some practice. He's not much of a firearm enthusiast and knows little about the subject to which I hold so dear. He was shooting .38's throuugh my .357, but I had indescrimenantly swapped a handful of .357's into the box before we left the house. He didn't notice the difference between the two until she went "BOOM." Palefaced he asked me "did I just break something?"