AR15 headspace gauge? Anyone in Bakersfield have one?

[mds2004]

I just pieced my AR and have a new barrel with a used bolt. I would like to get the headspacing checked but do not have a gauge. Unfortunately none of the shops have their gunsmiths working on weekends.

Is there a way to check the headspace without a gauge? Can I insert a bullet and case without a primer and see if it will cycle?

Does anyone here in Bakersfield have a gauge to check?

Thanks guys,
Mark

[Fjold]

The headspace is set by the extension that is attached on the barrel. As long as you have spec parts, it doesn't matter if you change bolts.