Don't include muzzle devices. Use a cleaning rod down the barrel to measure bolt face to crown.
Then calibrate using the OBT tool and it will give you a more accurate estimation of what the...
Type: Posts; User: Pommy
Don't include muzzle devices. Use a cleaning rod down the barrel to measure bolt face to crown.
Then calibrate using the OBT tool and it will give you a more accurate estimation of what the...