FC 10 or FC 10 Match reload problems?

[maillemaker]

So I've run across some brass that looks to be .45 ACP, but it is headstamped as either FC 10 or FC 10 MATCH.

I am having a hard time seating primers in them, as there is a step leading into the primer pocket instead of a nice radius/chamfer as found on most brass.

So far I've weeded out about 20 of them out of my pile of brass.

Any thoughts on this brass?

Steve

 

[Adamantium]

I've seen this stuff too. Those are crimped primer pockets and you'll need to remove them if you want to reload the cases. I personally just throw them out.