A buddy and I went out to some private land to do some shooting today and while we were warming up with our pistols his XD had a light primer strike. He immediately ejected the round and loaded it back into the mag. I told him that when he has a light primer strike he needs to use the "20 second rule" by keeping the muzzle pointed down range in a safe direction for 20 seconds before handling the round. He looked at me pretty puzzled which made me wonder if the twenty second rule is actually a rule or if its just one those things you hear that doesn't really hold any water. I had a light primer strike last week and used the 20 second rule before ejecting the round but even then I was nervous because in my mind if the primer is unstable I don't want anything to do with it. After having negligent discharge some time ago (with the barrel pointed in a safe direction) I have been obsessed with safety and I'm wondering if that is the best way to deal with light primer strikes. Any thoughts, experiences, or feedback?