After I ejected the shell I picked up the case and noticed the primer was missing. I figured it probably got ejected with the spent cartridge but just to be safe I pulled the bolt and couldn't see through the bore. When I got back home I knocked whatever it was out. It would have been just at the start of the rifling. I wanted to examine it but I'll be damned if I can find it. I should have done it on a non carpeted part of the house. I will continue to look for it but it is small and I might not be able to find it. I also thought maybe it could be in the gun someplace, like the magazine but I don't see it.

I didn't bring the case in with me. I wish I would have. I will go out tomorrow if it doesn't rain and examine it.