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grubbylabs · December 25, 2012, 09:31 PM

So I just got these head space gauges and I am getting mixed readings.

If I understand the process right you measure a case you just shot. Then set the sizing die so that it bumps the shoulder back .001 or so for a bolt rifle and about .003 or so for a semi auto rifle.

Well it seems that all the cases from my new AR vary by about .003 or so. These were all new Winchester cases, this is the first time I have used them.

I did not size or trim before I loaded.

Do I have a problem or is this normal?

December 25, 2012, 09:31 PM	#1
grubbylabs Senior Member Join Date: October 11, 2009 Location: Hansen Idaho Posts: 1,465	Head space questions So I just got these head space gauges and I am getting mixed readings. If I understand the process right you measure a case you just shot. Then set the sizing die so that it bumps the shoulder back .001 or so for a bolt rifle and about .003 or so for a semi auto rifle. Well it seems that all the cases from my new AR vary by about .003 or so. These were all new Winchester cases, this is the first time I have used them. I did not size or trim before I loaded. Do I have a problem or is this normal? __________________ * (Swinging club) Whack! whack! whack! * Nope, the old nag's still dead . (Capt Charlie)