So In a semi auto AR10, fire formed rounds of 7.62x51 in chamber measures 1.635” on fired brass using hornady Headspace gauge.
308 brass fired measures 1.6295-1.632”
now I do have a go gauge of 1.633 though never actually used it in the barrel due to not being able to remove the extractor pin.
my question is is headspace of 1.624” oversized (full length sized) on 7.62 brass? And would ideal measurement be 1.6315-1.632” on 7.62 and 1.626-1.627” on 308 brass?
308 brass fired measures 1.6295-1.632”
now I do have a go gauge of 1.633 though never actually used it in the barrel due to not being able to remove the extractor pin.
my question is is headspace of 1.624” oversized (full length sized) on 7.62 brass? And would ideal measurement be 1.6315-1.632” on 7.62 and 1.626-1.627” on 308 brass?