Resize problem

[fguffey]

Annealed and resized some brass last night and had a chambering issue. I first annealed then ran all the brass through my Redding FL sizing die

You went through the task of sizing the cases and finished without knowing if the cases were sized. When the press wins and sizes the case the bottom of the die contacts the top of the shell holder. The case has resistance to sizing; if the press is not strong enough to overcome the cases' ability to resist sizing the case length from the datum/shoulder to the case head the die will not make it to the shell holder. All of my life when this happens I use a feeler gage to measure the gap between the shell holder and die.

I have also removed the die from the press on presses that allows shell holder remove without removing the case. after removing the die with the case protruding I measure the amount of protrusion. In the perfect world the protrusion should be .125"; if the protrusion is .135" there is .010" of the case that did not get shoved into the die, millage could vary.

And then there is case lube, I use a no-name lube for the difficult to size case.

F. Guffey

 

[Uncle Ed]

Remove the expander from your Redding full length die and size the case again and chamber the case.
If the case fits you have your answer, the long Redding expander with its added friction and drag.
Did you ever wonder why so many reloaders don't like expanders, I bet most of them have Redding dies.
Did you lube the insides of your necks or brush them after annealing?

Below my Redding .243 full length die fitted with a Forster expander and spindle assembly and "far" less drag and friction friction. Plus far less neck runout from the "smaller" high mounted floating expander.

Imperial dry neck lube is powdered graphite that is nothing more than finely ground "carbon". And carbon is what many shooters say cleaning the cases is removed from inside the neck. And when you dip the neck in this lube the expander smears a new coating of "carbon" inside your necks. And then the insides of your case necks will be slicker than snot on a door knob