At the range a guy was shooting a Ruger semi 22 pistol. He said something was wrong. We investigated the round next in the mag had the tip partially blown off. We found the ejected brass and the primer was split. His hands had powder marks but otherwise OK. It was Remington bulk stuff. The gun seemed OK too. Doesn't like it went off out of battery. He said some of the rounds seemed under powered that one looks like it had the missing powder. Any ideas?