I need a bolt head to replace that currently installed in my rifle - the headspace currently measures .076", which is longer than the 'NO GO' specification. In order to bring the headspace within the specified range (and as close as possible to the minimum), I need a bolt head which measures ca. .641" from the rear surface which contacts the bolt body to the face of the bolt head - any bolt head which measures within plus-or-minus .003" of that length would be acceptable.
Does anyone have a spare that falls within that range, or can anyone point me to a likely source for one?
I am aware that over-long headspace is not necessarily a safety issue, and that it can be compensated-for in fireforming the brass, but still want to bring the rifle's headspace within the specified range, to avoid potential problems.

Thanks;

mhb - Mike
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