Man am I confused. Maybe I go about this on too simple a basis.

What were those used cases fired in?

If your factory loads and new Laupau fit fine, then the other cases were blown way out.


And if I was doing this I would get the Hornady Shoulder die set for the comparator and the decent micomreter to go with it (Sear steel, one turn per dial) , see what they are out at the shoulder and if your dies is bumping back at all.

Hard cam over you should get .005 to .010, maybe as much as .015.


I am missing all this comparing head space gauges and chamber measurements.

The rest is some kind of exotic method I have not heard of and sounds excessively complicated

So far we don't know what the should is doing and comparing a case to a gauge is ???????

Maybe I am just old and out of it, but its not the way I have learned.

Measure a case, fire it in the gun, bump it back to what fits seeing what's going on with the Hornady should adaptor for that caliber.