Correct :
What I was trying to show was even if we know what the Indian headspace measurement is/are we have no idea what their datum point is, so, unless we had actual Indian calibrated gauges it is impossible to headspace.
A question for those more knowlegable than I :
Would it be safe to assume that using the same ammunition (7.62 Nato) in what SHOULD be a similar sized chamber (NATO Spec ?) that it would be safe to use L42 gauges and L42 headspace dimensions ?