Most people have heard the importance of only using flat tipped rounds in tube fed rifle, but how much danger is there really? That’s the question TAOFLEDERMAUS set out to answer in his latest experiment. For this test, he created a special tube loaded up with some 5.56 cartridges to see what would happen if the first round in the tube was fired. Will the first bullet strike the second primer and start a chain reaction. If so, will the reaction move through the entire tube? The results were more than a little dramatic.