I did the exact same thing this past fall. I had been away from shooting since a 2006 motorcycle accident that messed up my right arm for a few years. So it had been a while since I did any reloading. My very first .223 round ended up looking just like yours. Problem was just as pointed out, improper die set up / over crimping. I doubt you will be able to iron out something like that. Even if you could, there will now be a weak spot in the brass. I saved the ruined case and keep it next to my reloader to remind me never to do it again.
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