Unknown casing and question about seating

[martinb3152]

Hello, I have a dillon 550b that was passed on down from my brother and I have been reloading .45acp with it currently. But I ran across this case when cleaning my brass and I can't make what origin this case came from. It fits into my .45acp dies really tight. So I am not going to use them. It looks like it's made out of a combination of nickel and brass or something. I found quite a few of these at the range, so I guess it's kind of a common case. I am also am having some seating problems with some cases. I have to press down fairly hard to get them to seat properly. The press is clean, so I don't know what else it could be except that maybe I should get a primer pocket cleaning tool to clean the pockets before I load? Any suggestions or tips would be greatly appreciated....
thanks,
martinb3152

 

[X-Ring]

That primer is crimped in, you must remove the crimp. See the ring around the primer on the brass?

 

[schnarrgj]

X-ring is correct. The case is military surplus made at the Twin Cities plant. That's why the primer is crimped. It is usually a heavier brass then our regular commercial.