I put a couple hundred rounds through my Shield today. Everything worked great. I came home and cleaned it and filled the mag with Critical Defense rounds for conceal carry. I tried to place the mag into the firearm and it will not go all the way in. I can get both magazines in with 1 round less than they carry, but neither when they are full. I even tried different ammo. Does anybody have any ideas? I could easily slide it in with the action locked back.