I noticed this week that the Hevi #7s that I've had loaded in the Benelli were doing that - pushing in and allowing some of the buffer to be visible and escape. They didn't stand up to use nearly as well as I was expecting. They worked great on the two gobblers that I got in range, but the ones that I carried in my gun look to be the worse for wear for sure! Need to do some research and find the best thing to put on the rest of mine to avoid that...