that looks real nice,did you compare the two breechplugs length from face to primer shoulder?i've wondered how close the tolerances are on them.....karl
What i did was switch breech plugs between the rifles. This showed me the rifles were slightly different. Most OEM breech plugs i have measured, are very very near the exact same.
The critical measurement regarding headspace is the OAL of the plug and primer in the pocket.