Browning Bt-99 Owners Manual

The guide pins on the butt plate run on Teflon® bushings (Figure 18).
This ensures long life and smooth action of the GraCoil recoil reduc-
tion system. An occasional cleaning and light lubrication of the guide
pins will prevent premature wear. A light oil is suitable for lubrication.ADJUSTING THE GRACOIL RECOIL REDUCTION
SYSTEMWhen making adjustments to the GraCoil
system’s compression unit, be aware that the
unit should be adjusted to the shooter, not
to the shell size or loads being fired. When...

5 To personalize the GraCoil recoil 
reduction system, bring the gun to your
shoulder as if you are ready to call for a 
target. If the unit compresses when you
perform this action, the compression of
the unit is set too light. Remove the pad
again according to Step 2 and increase the
compression ONE TURN by inserting the
3⁄32 Allen wrench into the hole in the 
center shaft and turning the wrench 
counterclockwise (heavy) to increase 
compression.COMPRESSION 
ADJUSTMENTS ARE A MATTER OF
TRIAL AND...

ADJUSTING LENGTH OF PULLThe GraCoil system on your BT-99 shotgun also allows up to 1 of
length of pull adjustment. To adjust the GraCoil system for length of
pull, perform the following:BEFORE PERFORMING ANY ADJUSTMENTS, ALWAYS MAKE CERTAIN THERE
IS NO SHELL IN THE CHAMBER.1 With a 
7⁄64 Allen wrench, loosen the two set screws on the right 
side of the stock plate by turning them counterclockwise one turn
(Figure 21).
2 Loosen the butt plate by inserting a 
3⁄32
Allen wrench into the single hole on the...

they have, refer to the last section and follow the directions to adjust
the recoil reduction unit to your needs.
ADJUSTING THE PAD PLATEThe pad plate on your BT-99 shotgun is fully adjustable to aid in your
comfort and the accuracy of your shotgun
(Figure 23). To adjust the GraCoil system
pad plate, perform the following:BEFORE PERFORMING ANY ADJUSTMENTS,
ALWAYS MAKE CERTAIN THERE IS NO SHELL IN
THE CHAMBER.1 Remove the recoil pad by inserting a 
3⁄32
Allen wrench into the two openings in the
recoil pad...

5 Reinstall the recoil pad by tightening the two screws with the 
3⁄32
Allen wrench.
INVECTOR-PLUS™ CHOKE TUBE SYSTEMNew model BT-99 shotguns feature a barrel fitted with the Invector-
Plus™ choke tube system. Older BT-99s may also have the Standard
Invector™ tube system or a conventionally choked barrel. The
Invector-Plus system is a screw in choke tube system with interchange-
able tubes. You can confirm this by reading the inscription on the
right side of the barrel.MARKING ON BARREL TYPE OF...

The words INVECTOR-PLUS mean your shotgun uses the 
Invector-Plus choke tube system designed for use in Browning 
12 gauge shotguns with back-bored barrels. The extra length,
combined with special tube tapers, gives the finest possible patterns
for target shooters. Plus, you retain the same choke switching 
convenience of the Standard Invector system. Invector choke tubes are
all fully steel and lead shot compatible. A special choke tube wrench is
provided to remove and tighten these tubes.
CAUTION:...

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 APPROPRIATE GAUGE AND TYPE OF CHOKE TUBES MARKED
INVECTOR OR INVECTOR-PLUS. 
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 BROKEN
OPEN! NEVER ATTEMPT TO REMOVE OR INSTALL A SHOTGUN CHOKING
DEVICE...

THE INVECTOR CHOKE TUBE SHOULD BE PERIODICALLY CHECKED TO
ASSURE THAT IT IS TIGHT AND FIRMLY SEATED. BEFORE CHECKING, 
FOLLOW THE SAFETY GUIDELINES OUTLINED PREVIOUSLY.Replacement and additional tubes and wrenches are available from
your Browning dealer, or by 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-Francois
St-Laurent, Quebec H4S 1W6
(514) 333-7261
INVECTOR...

designations when selecting a proper tube for your BT-99, as your 
new shotgun is unsuitable for any hunting use.CONVENTIONALLY CHOKED BARRELSIf you have a BT-99 with a conventionally choked barrel it is also easy
to determine choke constriction. Constriction of conventionally
choked barrels is shown with a neat, clearly defined mark found at 
the chamber end of the barrel, on the left side surface of the polished
barrel lug. The coding is as follows:
MARKING ON LEFT BARREL LUG OF A AMOUNTCONVENTIONALLY...

CLEANING PROCEDURES —BE CERTAIN YOUR GUN’S CHAMBER IS UNLOADED. ALWAYS WEAR 
PROTECTIVE SAFETY GLASSES DURING ALL ASSEMBLY, DISASSEMBLY 
AND CLEANING PROCEDURES. KEEP AMMUNITION AWAY FROM THE 
CLEANING AREA. DO NOT TEST THE FUNCTION OF YOUR FIREARM WITH
LIVE AMMUNITION.1 Remove the barrel and forearm from the receiver as explained 
previously.
2 Using a shotgun cleaning rod, with tip and patch large enough for 
a snug fit in the bore, insert the rod and lightly oiled patch in the
breech end of the barrel...