Browning MAXUS, Owner'S Manual

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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 the Browning Customer Service Department.
c h o k e t u b e s e l e c t i o n
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 18). 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 to cross-reference from lead to steel, and determine the
appropriate tube for your ammunition and hunting/shooting situation.
Several choke tubes are supplied with your shotgun. The choke tubes listed are also available as
accessories. Remember, Standard Invector and Invector-Plus tubes are not interchangeable. Invector-Plus
tubes are for Browning shotguns with back-bored barrels only. Before removing or installing tubes, or
reading the rim notch code, make
sure your shotgun is completely
unloaded.
c h o k e t u b e r e m o vA l
1 Place the ˝safety” in the on safe
position. Always make sure the
shotgun is completely unloaded.
Always keep the muzzle pointed in a
safe direction.
2 Use the choke tube wrench to loosen
the tube, turning it counterclockwise
(Figure 19). Finger-twist the tube the
rest of the way out of the barrel.
c h o k e t u b e i n s tA l l At i o n
1 Place the ˝safety” in the on safe
position. Always make sure the
shotgun is completely unloaded.
Always keep the muzzle pointed in a
safe direction.
2 Before installing a tube, check the
internal choke tube threads in the
muzzle, as well as the threads on the
choke tube to be sure they are clean.
Lightly oil the threads with a high-
quality, lightweight gun oil.
3 Using your fingers, screw the
appropriate tube into the muzzle of
the barrel, tapered end first, notched
end outward. When it is finger-tight,
use the choke tube wrench to firmly
seat the tube.
NOTICE! the choKe tube should be
Periodically checKed to assure that
Figure 18
n o n o t c h e s
F i v e n o t c h e s
F o u r n o t c h e s
t h r e e n o t c h e s
t w o n o t c h e s
o n e n o t c h
r i m
n o t c h e s
p A t t e r n w i t h
l e A d s h o t
p A t t e r n w i t h
s t e e l s h o t
e x t e n d e d * * x - F u l l t u r K e y * *
i F u l l *
i i i M P. M o d i F i e d
F u l l
1
i i i M o d i F i e d
F u l l
1
i i i i i M P. c y l i n d e r M o d i F i e d
i i i i i s K e e t i M P. c y l i n d e r
n o n o t c h e s c y l i n d e r c y l i n d e r
*
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.
E
N
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