Hi guys,

I have a carbine with a rifle barrel cut down. Some of you helped me identify what I had. Thanks

I am now trying to reload for it. The problem I feel is the shoulder. I have some reloads for this carbine from the guy I got it from and they will not load. I have a factory round that loads just fine. I resized some old (60s- 70s ) brass both Win and Rem (not sure what rifle they were shot from). Casing length in spec, but the bolt will not close. the start of the shoulder should be .500s, these are 700s. I have RCBS FL dies, so I am not sure what the deal is?
Do I need to aneal the brass to get the shoulder moved back?

I am also going to cast the chamber for GP.

Thanks
Martin