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I was cleaning up my brass and noticed that the primers had some strange indentations on them. I was shooting an XD 45 compact using CCI blazer brass ammo. The gun probably only has about 350 rounds through it. I am not sure if this is a normal indentation or not. I have never really paid much attention to the primers before, I usually just sweep the brass up and dump it in the bucket at the range.
http://img505.imageshack.us/img505/9430/45acpsp0.jpg
You got one powerful hammer spring or some awful soft primers. Does it do the same thing to Winchester or any other ammo? If it does I would have a gunsmith check it out. If it doesn't then I would quit using that brand of ammo. Good luck.
That's pretty common. The firing pin is remaining in contact with the primer while the barrel is unlocking, hence the funny little "drag" mark. I believe this is sometimes from semi-hot ammo, sometimes from a weakish firing pin spring.
Normal.