I recently bought a Mossberg715t, and have found out that it only wants the hot 22 ammo. Any ammo under 1300 fps will fail to load and eject. It was frustrating for this to happen. On the way home from the range saturday, it occured to me what is going on. It turns out that Remington and federal rounds are not fast enough. I stopped and got some Winchester super speedy, and no problems from it at all. Every Federal round I shot caused problems. Same with the Remington. I hope that this will help someone.