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Browning Auto-5 and Beretta shotguns Marking Systems

Browning Auto-5 and Beretta shotguns Marking Systems

My shotgun does not state the size of the choke as I typically see. How do I know the restriction of the choke on my barrel?


While some shotgun manufacturers will use a standard marking on their barrels and choke tubes, others may use a marking system. Both the Browning Auto-5 and most Beretta shotguns use marking systems to identify their barrel and choke tube restrictions. We have compiled the chart below to help identify these marking systems.

Choke Restriction Identification

American English Italian Browning Perazzi Percentage
Cylinder True Cylinder C**** *** 0 40%
Skeet Improved Cylinder S **S 1 45%
Improved Cylinder Quarter **** **_ 3 55%
Modified Half *** ** 4 60%
Improved Modified Three Quarter ** *_ 6 65%
Full Full * * 9 70%
Extra Full         75%

 

Additional note: Beretta Optima choke tubes are also identifiable by the visible notches at the muzzle.

Beretta Optima Choke Tubes

Beretta Optima Notches American
I Full
II Improved
III Modified
IIII Improved Cylinder
IIIII Cylinder

 

For more information on chokes, you can read our An Introduction to Shotguns blog by clicking here.

American

English

Italian

Browning

Perazzi

Percentage