I'm looking for info on checking AR headspace.

I'm sure several books have that sort of info( and I'd be interested in recommendations) but I was wondering if there was any IMMEDIATELY avaiable info on the web.

I have the NO-GO and FIELD guages, which are the two the Bushy guy recommended I get as a minimum.

I'm a fairly handy guy, and it semms like an VERY important, yet VERY easy thing to do.

Can anyone help, or recommend some good sources???