The easy way is to insert a dowel, pencil, or bamboo skewer into the barrel (action closed!) until it stops. then measure the result. I think there is confusion between the" face of the bolt" and the front of the receiver/barrel extension. I will be very surprised if it is non-standard length.
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"... Liberty is the seed and soil, the air and light, the dew and rain of progress, love and joy."-- Robert Greene Ingersoll 1894
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