I guess I'm going overboard. I've heard belted mags should use the shoulder for headspace not the belt. Just trying to establish that on the 1st fire. Since after the first fire I will be using the shoulder, it probably won't be an issue, as AzShooter has said. Probably just load 'em and go.
After the first fire you will have to trim the brass and then neck size it or did you trim it before fire forming??
