first, you must realize that the commies never built to saami (small arms ammunition manufacturers institute) standards.

secondly, kalashnikovs tolerate long headspace conditions.

are you SURE  that you mean twenty-five thousandths of an inch...and not two and a half thousandths?

at approx. .004" per thickness of tape, that adds up to 6+ layers of tape!!!

thrd, no matter what some folks say, we are better off going to "the bible" for accurate measurements....a set of manson or clymer gages.