The Firing Line Forums - View Single Post - Datum to head length and head space issue

mehavey · August 16, 2014, 10:41 PM

Don't sweat the feeler gauge just yet. That's for sizing to a known dimension "less than "lull length."
Since you are already using the Hornady comparitor, you are sizing to an exact dimension, not a ram gap..

See if a firing results in a normal sizing operation next time around.

August 16, 2014, 10:41 PM	#24
mehavey Senior Member Join Date: June 17, 2010 Location: Virginia Posts: 6,903	Don't sweat the feeler gauge just yet. That's for sizing to a known dimension "less than "lull length." Since you are already using the Hornady comparitor, you are sizing to an exact dimension, not a ram gap.. See if a firing results in a normal sizing operation next time around.