Going through reloading some range brass 9mm and came across this piece of federal. Not too sure what would have caused this or if it affects shooting again. Any help would be appreciated.
What happened to that case? Nothing it was manufactured that way. Next time your at the range look around at the spent brass laying around, you will see this is quite common, it is just a factory stamping or crimp put in the brass by some manufacturers on some loads when it is manufactured.