Where can I find the constrictions or dimensions on my Beretta choke tubes?

Beretta 12 gauge. shotguns are offered with either the Mobilchoke or Optima-Choke tube systems.  20, 28 and 410 gauges are only offered in Mobilchoke. The following chart lists the nominal inside diameters for both types of 12 gauge chokes.

Please note that variations will exist due to engineering and machining tolerances.  There are many factors that determine how each choke will pattern. The measured internal diameter is only one factor, we supply these charts for a general comparison use only. It is always best to pattern your firearm, with the choke and the type or brand of shot shell you will actually use in order to determine the optimal combination. These measurements are supplied only as a guide -  Remember, it is not the actual internal dimension that is important, but how well the choke patterns for your particular needs.

CHOKE DESIGNATION 12 GAUGE MOBILCHOKE OPTIMA-CHOKE OPTIMA-CHOKE HP
Xfull Turkey 0.665 0.675 0.691
 Full 0.695 0.694 0.695
 Light Full N/A 0.702 N/A
 Improved Modified 0.7 0.706 0.707
 Modified 0.705 0.716 0.712
 Light Modified N/A 0.718 N/A
 Improved Cylinder 0.715 0.724 0.719
 Skeet USA 0.718 0.727 0.726
 Cylinder 0.723 0.732 0.728
Skeet European 0.73 0.759 N/A
 Bore 0.723 0.732 0.732

 CHOKE DESIGNATION 20 GAUGE MOBILCHOKE FLUSH MOBILCHOKE EXTENDED  OPTIMACHOKE HP
 Extra Full N/A 0.6 N/A
 Full 0.598 0.605 0.601
 Light Full N/A 0.607 N/A
 Improved Modified 0.604 0.61 0.608
 Modified 0.613 0.615 0.611
 Light Modified N/A 0.617 N/A
 Improved Cylinder 0.62 0.62 0.616
 Skeet USA N/A 0.624 N/A
Cylinder 0.629 0.629 0.625
Skeet 0.64  N/A N/A
Bore 0.629  0.629 N/A

CHOKE DESIGNATION 28 GAUGE MOBILCHOKE FLUSH  MOBILCHOKE EXTENDED OPTIMACHOKE HP
 Extra Full N/A  0.520  N/A
 Full 0.519 0.525 0.524
 Light Full N/A 0.528 N/A
 Improved Modified 0.527 0.53 0.528
 Modified 0.53 0.533 0.53
 Light Modified N/A 0.538 N/A
 Improved Cylinder 0.538 0.542 0.535
 Skeet USA N/A 0.548 N/A
 Cylinder 0.545 0.55 0.545
 Skeet 0.556  N/A N/A
 Bore 0.545 0.545 0.545

 CHOKE DESIGNATION 410 GAUGE  FLUSH  EXTENDED
 Extra Full  N/A  N/A
 Full 0.384  N/A
 Light Full  N/A  N/A
 Improved Modified  0.389  N/A
 Modified 0.395  N/A
  Light Modified N/A   N/A
 Improved Cylinder 0.401   N/A
 Skeet USA N/A  N/A
 Cylinder  0.408  N/A
 Skeet 0.42  N/A
 Bore  0.408 0.408

 

Please contact your local Beretta dealer for additional assistance and to purchase your choke tubes. You can also purchase your choke tubes from Beretta.

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