Manual

ammunition that does not match the corresponding gauge or caliber of
the firearm. For example, do not use 20 gauge ammunition in a 12 gauge
gun. In addition, do not use rounds with chamber lengths that exceed
the chamber length of the firearm barrel.
DANGER - AMMUNITION WARNING!
SERIOUS INJURY OR DEATH OR PROPERTY DAMAGE
MAY RESULT FROM ANY CONDITION WHICH CON-
TRIBUTES TO THE GENERATION OF EXCESSIVE PRES-
SURE, OR THE UNCONTROLLED RELEASE OF GAS,
WITHIN A FIREARM. THE FOREGOING ADVERSE CON-
DITIONS CAN BE CAUSED BY BORE OR CHAMBER
OBSTRUCTIONS, PROPELLANT POWDER OVERLOADS,
OR BY DEFECTIVE, INCORRECT CALIBER, GAUGE OR
LENGTH, OR IMPROPERLY LOADED AND ASSEMBLED
AMMUNITION COMPONENTS. IT IS EXTREMELY DAN-
GEROUS TO USE AMMUNITION WHOSE PRESSURE IS
GREATER THAN THAT DEVELOPED BY AMMUNITION
LOADED TO FACTORY STANDARDS. EVEN THE
STRONGEST FIREARM CAN BE BLOWN UP AS A
RESULT OF EXCESSIVE PRESSURE.
The following information describes the identification system used to
designate the gauge, chamber length and choke on your Merkel firearm.
Be sure you understand this identification system before loading your
firearm, and only use the correct ammunition. If there is any question in
regard to the proper ammunition for your firearm, feel free to call GSI at
205-655-8299 for assistance.
Firearm gauge, chamber and choke designations are engraved on the
underside of the barrels where they interface the breech block of the
receiver (See figure 11). A typical example of a gauge/chamber length
designation would be 12/76 which identifies a firearm bore diameter of
12 gauge and 76 mm (3 inch) chamber length. Bore diameters are
available in 12, 16, 20 and 28 gauge.
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