[Jonc7]

Loaded up some Missouri 180gr hard cast over 9.3 grains of Blue Dot (Plinking Loads). The issue I had was after belling the case it seemed when I loaded them they bulged the brass quite a bit, even made it difficult to eject a live round from the chamber. Any idea what would cause this? Maybe the bullet diameter is larger then .401? Any help is appreciated, can upload pictures if needed.