Different lengths for once fired brass?

[Nuclear Worker]

One other quick comment. You do realize that the Lee neck collet die is not supposed to have any affect on the base to datum measurement. This die should size only the neck, so if you length changed by resizing in the neck collet die, there is something else going on.

Yes I do realize that. I just thought maybe the cases that were 1.8155after sizing the neck, maybe it could gain.0005 ? Also I do anneal my brass every time I reload with my bench source.

 

[Csbc4fun]

It seems to be working for me!View attachment 531218

That is the strangest thing, that is exactly how it is supposed to shoot! Targets don't lie! You are the man…

What bullet are you shooting here? Must be light to get 3017 out of H4350.