Originally Posted by statjunk
I think you miss read the question. This is about sizing. This is about when I'm sizing and I've pushed the shoulder beyond where it should be I can't seem to move it again.
Can you take a second to re-read the post?
I've come across this because I'm no longer neck sizing. I'm bumping the shoulders back .002.
Reading your original post, which is a bit confusing, I think what you are saying is that you bumped the shoulders back 0,007" on a piece of brass. More than you wanted. So you readjusted the die to bump them back less, put the same brass in the die and it was still too short, but brass you hadn't sized before adjusting comes out where you want it to. If I'm understanding this correctly, you made the original post because you find this confusing.
So I'll explain. You can only make shoulders shorter with a full length sizing die. You can't make the shoulders longer by not pushing it in the die as far, which is what you are apparently trying to do.
If you push the shoulder back .007", adjusting the die up 0.005" and putting it back in the sizing die again won't make the shoulder longer on the brass that was too short but it will properly size brass that wasn't too short.
Bottom line, shoulder bumping in the die is a one way process. If you push them back too much in the die you need to fire them to get them back to chamber length.