dO nOt use any Other ChOking deviCe in any shOtgun barrels
supplied by brOwning.
failure tO fOllOw these warnings may Cause injury Or death
and Cause damage tO yOur shOtgun.
All current production 12 and 20 gauge Citori shotgun barrels
have been threaded to accept the Invector-Plus
™
choke system.
16, 28 gauge and .410 bore Citori shotgun barrels have been threaded
to accept the Standard Invector
™
choke system. Standard Invector and
Invector-Plus tubes are not interchangeable. You may confirm the
choke system of your shotgun by looking on the right side of the
barrel where the specifications are inscribed, where the choke
markings are normally located.
The constriction of each choke tube is indicated twice on the choke
tube: on the side of the tube, and indicated with a “notch” code on the
top rim of the tube. The included universal choke tube wrench is used
to remove and install choke tubes.
Invector choke tubes are compatible with factory ammunition that has
been loaded in compliance with SAAMI specifications, including
magnum lead and steel shot loads, sabots and shotgun slug loads.
Replacement and additional tubes and wrenches are available from
your Browning dealer, or by contacting our Consumer Department.
See “Service or Repair” on page 33 for contact information.
CHOKE TUBE SELECTION
To help you choose the correct choke tube for each hunting and
shooting situation, all Browning Invector 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
(Figure 11). 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 charts on the next page
to cross-reference from lead to steel, and determine the appropriate
tubes for your ammunition and hunting/shooting situation.
NO NOTCHES
FIVE NOTCHES
FOUR NOTCHES
THREE NOTCHES
TWO NOTCHES
ONE NOTCH
figure 11
RIM
NOTCHES
PATTERN WITH
LEAD SHOT
PATTERN WITH
STEEL SHOT
extended** x-full turkey **
i full *
ii imp. mOdified
full
1
iii mOdified
full
1
iiii imp. Cylinder mOdified
iiiii skeet imp. Cylinder
nO nOtChes Cylinder Cylinder
*
Not for use with steel shot. Using an over-tight choke constriction with
steel shot will result in an ineffective “blown” pattern.
**
Extra Full Special, extended with ports. Do not use with steel shot.
1
When more than one choke designation is listed for a given steel shot
pattern, use the more open choke listed for high velocity, larger shot size
steel loads.
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