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Re: is this headspacing
Read the article below from 6mmbr.com, this person has his 6mmbr set up a + .005 over minimum headspace.
(this would be +.007 using a new unfired case as a headspace gauge)
http://i122.photobucket.com/albums/o...cMIC_6BRAA.jpg
"Now I can use the 308 version of the RCBS Precision Mic to compare brass which has been fully sized in my 6BR body die with brass which has been fired in my chamber. With the spacer inserted, FL-resized cases mic 0.000” at the datum point on the shoulder. Using the same set-up, fire-formed cases measure 0.005”. In other words, my chamber has a headspace of +0.005" above minimum dimensions. This is fairly typical of a custom rifle set up for switch-barrel use."
Click on the link below.
TOOL TIP -- Headspace Measuring
http://www.6mmbr.com/6BRPrecMIC.html
Ain't it funny what a little reloading bench engineering can do for you. (why do you think I have and use a RCBS Precision Mic?)