Hello All, Yesterday I was flying out of Austin after a business trip and was doing the normal declare firearm drill, they sent me over to TSA to make sure it was unloaded and do a swab around my bag. First bag with gun no problem, second bag with ammo (2, 50 rd boxes left over from range trip) when they swabbed my bag they clipped the swab into the machine it beeped and turned red, I said OH that's not a good color. He said yeah it's saying there is tnt particles on this bag. I politely told him I don't even mess with big firecrackers due to an incident as a child, my hands are important to my profession and I'd like to keep them. He gets on the radio and calls over more TSA agents. They zero in on my shoes, get nothing, I jokingly tell him that the TNT must have been in the San Marcos River because I had been Kayaking in those shoes the day before. Couple more areas they retest everything comes back negative. They let me go through. My question to you all that travel with guns alot is, has this ever happened to you? Could spent powder from a Mag tumbling around in that bag set it off, I'm not a chemist by any means so what else might have caused this ?