Constrictions or dimensions on my Beretta...

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

Xfull Turkey

0.665

0.675

 Full

0.695

0.694

 Light Full

N/A

0.702

 Improved Modified

0.700

0.706

 Modified

0.705

0.716

 Light Modified

N/A

0.718

 Improved Cylinder

0.715

0.724

 Skeet USA

0.718

0.727

 Cylinder

0.723

0.732

Skeet European

0.730

0.759

 Bore

0.723

0.732

 

 CHOKE DESIGNATION 20 GAUGE

FLUSH

EXTENDED

 Extra Full

N/A

0.600

 Full

0.598

0.605

 Light Full

N/A

0.607

 Improved Modified

0.604

0.610

 Modified

0.613

0.615

 Light Modified

N/A

0.617

 Improved Cylinder

0.620

0.620

 Skeet USA

N/A

0.624

Cylinder

0.629

0.629

Skeet

0.640

 N/A

Bore

0.629

 0.629

 

 CHOKE DESIGNATION 28 GAUGE

FLUSH

 EXTENDED

 Extra Full

N/A

 0.520 

 Full

0.519

0.525

 Light Full

N/A

0.528

 Improved Modified

0.527

0.530

 Modified

0.530

0.533

 Light Modified

N/A

0.538

 Improved Cylinder

0.538

0.542

 Skeet USA

N/A

0.548

 Cylinder

0.545

0.550

 Skeet

0.556

 N/A

 Bore

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

0.420

 N/A

 Bore

 0.408

0.408

Please contact your local Beretta dealer or Contact Us for additional assistance and to purchase your choke tubes. You can also purchase your choke tubes from Beretta e-store.

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