I purchased a LLama Maxi-I .45 ACP pistol. The problem I have is the shell casing upon being ejected after firing, has a crease/dent on one part of the mouth to the case. If I threw away the casings it would be no problem, but I save them for future reloading and even though the reloading dies get some of them round again, some cases are not. Is it an ejector problem, or slide spring? What causes the case to be deformed? Thanks.