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Small and Large gauges to assure your brass meets the demanding SAAMI specifications for primer pocket dimensions. Insert the GO plug gauge into primer pocket if it does not enter the crimp must be removed. Consider using a Lee Ram Swage or Lee APP Swage to complete this task. If the GO gauge fits very loosely reverse and verify with the NO-GO end. If the NO-GO enters to the bottom of the primer pocket the primer pocket is oversized and will not reliably retain all primers.
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.