Slow motion cameras are cool and if you say otherwise, you’re fooling yourself. The Slow Mo Guys do this for a living, and one of their newer videos takes on guns and bullets. What they did is simple; they fired a tiny gun with a tiny round at the primer of a larger round, in an effort to see if it would detonate the primer on the larger round and send it’s bullet out of the casing.
This is simply a ‘Just leaving this here’ article, and the video below is pretty cool to watch.