Insert the bullet into the breech and hold it snug into the rifling. Remove rod, open bolt and remove it from the action. Insert the dowel or cleaning rod and hold it against the face of the bolt. Close the bolt, and be sure the firing pin is retracted into the bolt. You will also need a sharp pointed pencil, a short dowel and a bullet sized but clean, of the type you are going to load.
You can use a flat tipped cleaning rod, or flat tipped dowel rod. This method works well on rifles and single shot pistols as well as Semi-autos. This is what I use for my guns to determine the max OAL and this eliminates any question of the crimp, incorrect case prep, or other operator induced error. How to determine the cartridge OAL with a dowel or cleaning rod.Ĭleaning rod/dowel method of finding cartridge OAL
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