Johnny's Shotgun Chokes & Forcing Cones
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Requirements for Choke Installation

In order to install choke tubes in your barrel, the barrel must meet the the following minimum and maximum dimensions. If you have access to a caliper you can check it on your end. If not, you can just send the barrel and I can check it on my end.

Terminology...Outside Diameter (OD) .............Inside Diameter (ID)

Minimum OD at the muzzle for 12 ga. Standard Diameter Truchoke installation: .825"
Minimum OD at the muzzle for 12 ga. Small Diameter Truchoke installation: .805"

Maximum ID of the bore for 12 ga. Standard Diameter Truchoke installation: .735"
Maximum ID of the bore for 12 ga. Small Diameter Truchoke installation: .728"

Minimum OD at the muzzle for 20 ga. Standard Diameter Truchoke installation: .705"
Maximum ID of the bore for 20 ga. Standard Diameter Truchoke installation: .625"

For any questions or other info please email or call. If you leave a message I will return your call. Visit my Contact Info page for contact information and shipping instructions.

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