This is why when you close a shotgun you bring the stock up to the action not vice versa. This is one of the many points on gun handling mentioned on our shoot.I once had an ad with a 20 side by side. While quail hunting I reloaded and closed the action and one barrel fired. I couldnt imagine my finger was near the trigger so I tried it again with the same result. Finally figured out that one of the firing pins was stuck in the fire position so it automatically fired when the action was closed. Everyone was safe because it was pointed in a safe condition. I will never allow a firearm to be pointed at me and I will never point one at myself or at another person. I know one person who’s dead and another lost use of his knee from their own firearms. Twice I’ve ended hunts because some idiot couldnt control their muzzle.
It happened a week ago, gun went off, blew a nice hole in the ground. Man went home with just the one sock .
Diagnosed as a stuck firing pin.