Worst I had was a double discharge on a .470NE. We were doing our PH dangerous game shooting exam, and both barrels went off hitting the "charging buff" just under the chin in the throat, and square between the eyes 1" below the bosses.
After the initial thump I took , I really lent into the rifle for the second shot which was only followed by a "click".
That rattled the confidence on big bores for a while to say the least.
