gunbugs, you may be a little harsh on the gunsmith. He probably has guages but will not loan them out. He just gave a suggestion on how Allen can make a rough check himself.
Much like the suggestion on the to use masking tape for excessive toggle slap
http://forum.lugerforum.com/showthre...le+slap&page=2
Unscientific, not an accurate measure, but gives one an idea whether there is a problem or not
In this case Allen's gun is on the edge and worth paying to have the headspace measured