Invector Interchangeable Choke System for Superposed B Shotguns

All current 12 and 20 gauge B-125 shotgun barrels have been threaded to accept the Browning Invector Interchangeable Choke System. You may pull the selector rearward, push to the left, then push forward exposing the "0" to the right. This simple coordinated movement follows the line of a block leter U: Rearward, then right or left as the case may be. then forward.

The barrel selector and safety are incorporated in the same mechanism. Push the button forward to take the gun "off safe" and to select the barrel you prefer for the first shot—to the right and forward for the under barrel and to the left and forward for the over or top barrel.

After firing the first barrel, the trigger mechanism automatically readies the second barrel for the

next shot.

Pull back the button with the thumb when you want to return to an "on safe" position. The "safety" operates manually and does not go "on safe" automatically when the breech is open.

AUTOMATIC EJECTORS—

Your Superposed shotgun's ejectors are fully automatic. They throw fired shells completely out of the gun upon opening the action. Unfired shells confirm this by looking at the rear end of the respective barrels, on the left-side surfaces of the polished breech. The word INVECTOR denotes that the barrel is threaded. The degree of choke in the tube is indicated twice on each choke tube: Inscribed on the side of the tube, and indicated with a "notch" code on the top rim of the tube. All Invector choke tubes are made with tempered steel and are fully compatible with all FACTORY AMMUNITION (loaded in compliance with SAAMI specifications) including Magnum lead and steel siiot loads and rifled slug loads.

20 AND 12 GAUGE INVECTOR —

This is essentially the same proven system as used on nearly all other Browning shotguns. It is a regular Invector tube that has been designed for use in 20 and most 12 gauge barrels. They are steel and lead shot compatible. Browning's universal tube wrench is used to remove and install these tubes.

Your Superposed shotgun may be equipped with either the Standard Invector Choke Tube System or the Invector Plus System for back-bored barrels.

CAUTION: INVECTOR PLUS TUBES ARE FOR USE IN BROWNING SHOTGUNS WITH BACK-BORED BARRELS ONLY, AND ARE NOT INTERCHANGEABLE WITH STANDARD INVECTOR CHOKE TUBES. DO NOT USE INVECTOR PLUS TUBES IN BARRELS THREADED FOR STANDARD INVECTOR TUBES. DO NOT USE STANDARD INVECTOR TUBES IN BARRELS THREADED FOR INVECTOR PLUS TUBES. FAILURE TO FOLLOW THESE WARNINGS MAY CAUSE DAMAGE TO YOUR GUN AND CAUSE INJURY TO YOURSELF AND OTHERS.

DO NOT FIRE A SUPERPOSED B-125 SHOTGUN WITHOUT HAVING AN INVECTOR CHOKE TUBE INSTALLED. PERMANENT DAMAGE MA Y RESULT TO THE THREADS.

DO NOT USE BROWNING INVECTOR CHOKE TUBES IN ANY SHOTGUN BARRELS NOT SUPPLIED BY BROWNING. ALSO, DO NOT USE

ANY OTHER CHOKING DEVICE IN ANY SHOTGUN BARRELS SUPPLIED BY BROWNING. USE ONLY THE APPROPRIA TE GAUGE AND TYPE OF CHOKE TUBES MARKED INVECTOR OR INVECTOR PLUS, DEPENDING ON YOUR SHOTGUN.

CAUTION: WHENEVER HANDLING ANY SHOTGUN FOR THE PURPOSE OF REMOVING OR INSTALLING A CHOKING DEVICE, MAKE ABSOLUTELY CERTAIN THE GUN IS FULLY UNLOADED, AND THE ACTION IS OPEN! NEVER ATTEMPT TO REMOVE OR INSTALL A SHOTGUN CHOKING DEVICE ON A LOADED FIREARM!

TUBE REMOVAL -

1 UNLOAD YOUR SUPERPOSED FULLY. INSPECT THE CHAMBERS TO MAKE SURE THEY DO NOT CONTAIN ANY SHELLS.

2 Place the "safety" in the "on safe" position and open the action.

3 Use the Invector wrench to loosen the tube, turning it counterclockwise. Finger-twist the tube the rest of the way out of the barrel.

TUBE INSTALLATION -

1 UNLOAD YOUR SUPERPOSED FULL Y. INSPECT THE CHAMBERS TO MAKE SURE THEY DO NOT CONTAIN ANY SHELLS.

2 Place the "safety" in the "on safe" position and open the action.

3 Before installing a tube, check the internal choke tube threads in the muzzle, as well as the threads on the Invector choke tube to be sure they are clean. Lightly oil the threads with an oil like Browning Oil.

4 Using your fingers, screw the appropriate tube into the muzzle end of the barrel, tapered end first, notched end outward. When it becomes finger-tight, use the Invector choke tube wrench to firmly seat the tube.

THE INVECTOR CHOKE TUBE SHOULD BE

PERIODICALLY CHECKED TO ASSURE THAT IT IS

TIGHT AND FIRMLY SEATED. BEFORE CHECKING, FOLLOW ALL THE SAFETY GUIDELINES OUTLINED ABOVE.

Replacement and additional tubes and wrenches are available from your Browning dealer, or by calling or writing:

Browning Consumer Department One Browning Place, Morgan, Utah 84050-9326. 801-876-2711.

Canadian customers please call or write:

Browning Canada Sports Ltd./Ltee, 5617 Chemin St-Fran^ois, St-Laurent, Quebec H4S 1W6. (514) 333-7261.

Figure 14

Figure 14

Choke Browning

In vector Choke Systems Charts

INVECTOR CHOKE TUBE CODE—

To identify individual Invector tubes, refer to the abbreviated indications on the side of the tube, or use the identification mark(s) located on the top rim of each tube. (See figure 14.)

INVECTOR TUBE SELECTION—

To help you choose the correct choke tube for each hunting situation, all Browning Invector

In vector Choke Systems Charts

12 Gauge Invector Plus

Rim Notches

Pattern With Lead Shot

Pattern With Steel Shot

Turkey Special

I

Full

II

Imp. Modified

Full***

III

Modified

Full***

mi

Imp. Cylinder

Modified

inn

Skeet

Imp. Cylinder

/

choke tubes are inscribed on the side with the patterns they produce with both lead and steel shot. Each Invector tube also has notches in the top rim of the tube. These notches are a code to allow you to determine the choke designation while the tube is installed. Rim notches refer specifically to lead shot. You will need to use the chart below to cross-reference from lead to steel, and determine the appropriate tubes for your ammunition and hunting/shooting situation.

Several tubes are supplied with your Browning shotgun. The tubes listed are also available as accessories. Remember, Invector-Plus and standard Invector tubes are not interchangeable. Invector-Plus tubes are for Browning guns with back-bored barrels only. Before removing/installing tubes, or reading the rim notch code, make sure your shotgun is fully unloaded.

12 Gauge Standard Invector

Rim Pattern With Pattern With

Notches Lead Shot Steel Shot

Knurled"** X-Full Trap Special

No Notches X-Full

Turkey Special

Knurled**** Rifled

I Full

II Imp. Modified Full***

III Modified Full***

111 i Imp. Cylinder Modified

IIIII Skeet Imp. Cylinder***

No Notches Cylinder Imp. Cylinder***

20 Gauge In vector Plus

Rim Notches

Pattern With Lead Shot

Pattern With Steel Shot

I

Full

Full

III

Modified

Imp. Modified

mi

Imp. Cylinder

Modified*'*

IIIII

Skeet

Modified***

No Notches

Cylinder

Imp. Cylinder

20 Gauge Standard In vector

Notches

Pattern With Lead Shot

Pattern With Steel Shot

I

Full

Full

III

Modified

Imp. Modified

III I

Imp. Cylinder

Modified***

IIIII

Skeet

Modified***

No Notches

Cylinder

Imp. Cylinder

'Sot for use u-iih steel sl)ot. Using an oivr-tight choke constriction with steel shot will result in an ineffeciiiv, 'blown'pattern.

"Extra Full Special. I)o not use uitb steel shot.

'"Uben more than one cbokc designation is listed for a given steel sbot [>attern, use the more open choke listed for high ivlocity. larger sbot size steel slx>t loads.

""Has knurled extension heyvnd muzzle.

'""For use u ith shotgun slugs only.

'Sot for use u-iih steel sl)ot. Using an oivr-tight choke constriction with steel shot will result in an ineffeciiiv, 'blown'pattern.

"Extra Full Special. I)o not use uitb steel shot.

'"Uben more than one cbokc designation is listed for a given steel sbot [>attern, use the more open choke listed for high ivlocity. larger sbot size steel slx>t loads.

""Has knurled extension heyvnd muzzle.

'""For use u ith shotgun slugs only.

CAUTION: DO NOT USE STANDARD INVECTOR CHOKE TUBES IN BARRELS MARKED INVECTOR-PLUS. DO NOT USE INVECTOR-PLUS CHOKE TUBES IN BARRELS MARKED INVECTOR. FAILURE TO FOLLOW ALL OF THE ABOVE WARNINGS CAN DAMAGE YOUR GUN AND CAUSE INJURY TO YOURSELF AND OTHERS.

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Responses

  • robert daecher
    Is there a cross reference for browning std vector choke tubes?
    6 years ago

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