Browning Bt-99 Owners Manual

3-A)  The forearm bracket.
3-B)  Barrel lug, hinge pin bearing surface, extractor extension 
and barrel flats.
3-C)  Hinge pin, cocking lever and locking bolt.
2  To attach the barrel to the action, grasp the stock’s pistol grip with
your right hand and anchor the butt stock between your right 
forearm and right side. With the thumb of your right hand, move 
the top lever sideways to the extreme right (Figure 4).
3  Grasping the barrel in the left hand, engage the barrel lug’s circular
recess with the...

Engage the rear portion of the forearm (forearm bracket) with the
action (Figure 7).
6  Pivot the forearm up to the barrel tightly. This will cause the take-
down lever latch to engage onto the barrel. It may be necessary to
depress the takedown lever latch. It should be flush with the wood on
the underside of the forearm. The forearm and latch can be installed
in one motion by positioning the forearm as shown and tapping the
forearm’s widest part sharply toward the barrel with the heel of your
hand...

DISASSEMBLY PROCEDURESDisassembling your BT-99 into two parts — the action/buttstock 
and the barrel/forearm — is ideal for storage or for cleaning 
and maintenance.BEFORE BEGINNING ANY DISASSEMBLY PROCEDURES, MAKE CERTAIN
THERE IS NOT A SHELL IN THE CHAMBER.1  With the action closed, anchor the buttstock against your upper leg
and pull the takedown lever latch outward.
2  At the same time, grasp the forearm with the other fingers of the left
hand and with the help of the right hand pivot the forearm...

Always keep the muzzle of your shotgun pointed down range at all
times when on the shooting line. When leaving or moving along the
line always open the action. Never load the chamber until you are
ready to shoot. Never have the action of your BT-99 closed except
when you are on the line, ready to shoot, when your gun is cased, or
when it is set in a gun rack at the range. When you retrieve your gun
from its case or from a gun rack, always immediately open the action
and check to assure that no shell is...

IF THE BREECH WILL NOT CLOSE COMPLETELY, UNDER NO CIRCUMSTANCES
SHOULD YOU ATTEMPT TO FIRE THE SHOTGUN.Break the action of the gun and unload it. Carefully examine the
breech surfaces, and remove the foreign matter. Remember to always
keep the polished breech surfaces clean and lightly oiled.
LOADING —CAUTION: REMEMBER, THE BT-99 SHOTGUN HAS NO MANUAL SAFETY.
LOAD YOUR BT-99 TRAP GUN ONLY WHEN SHOOTING IS IMMINENT. 
ONCE LOADED, THIS GUN IS READY TO FIRE AND SHOULD BE RESPECTED
AS SUCH. AT ALL TIMES...

FIRING — 
With the chamber loaded, and the action closed, the BT-99 is fired by
simply pulling the trigger. Never pull the trigger unless the muzzle is
pointed down range, at the clay target. Make sure people — other
shooters, spectators, trap operators — are not down range. If there is
any doubt about down range safety, open the action immediately and
remove the shell until you are certain all conditions are safe.OPTIONAL BARREL PORTINGYour BT-99 may or may not have optional barrel porting. The drilled...

The adjustable comb features an adjustment range of
1⁄4 for cast on
and cast off adjustment in 
1⁄16 increments. Cast on and cast off angle
adjustments of a maximum of1⁄8 are also possible. To adjust cast on
and cast off perform the following procedure:
BEFORE PERFORMING ANY ADJUSTMENTS, ALWAYS MAKE CERTAIN THERE IS
NO SHELL IN THE CHAMBER.1 STANDARD MODEL: Loosen the comb by inserting a 
7⁄64 Allen
wrench through the hole found on the upper left of the recoil pad
and into the Allen screw located within...

17
2 Carefully adjust comb to desired cast on or
cast off position (Figure 15) by sliding each
post equally in the desired direction.CAST
ON AND CAST OFF ADJUSTMENTS
ARE A MATTER OF TRIAL AND
ERROR.Adjust in small increments until
the desired sight picture on the rib is
reached. Each increment represents 
1⁄16.
Move the posts to the right for cast off
and to the left for cast on.
3 Right handed shooters may desire some cast
off, with left handed shooters preferring
some cast on. The terminology is the...

Unless adjusting drop at comb, reinstall the butt plate by sliding it
back into the stock and tighten the set screws using the 
3⁄32 Allen
wrench. Do not over tighten.
ADJUSTING DROP AT COMBAdjusting the drop at the comb allows you to align your eye perfectly
with the plane of the rib. A correct sight picture for most shooters
should have you looking down the rib with the bottom of the front
bead resting on the top of the middle bead. This forms a “figure eight”
or “stacked” configuration. Some of the...

comb by inserting a 
7⁄64 Allen wrench through the hole found on the
upper left of the stock plate and into the Allen screw located within
the stock plate (Figure 14). Turn wrench counterclockwise three full
turns to loosen Allen screw. This will sufficiently loosen the
Adjustable Comb, allowing adjustments to be easily made. The cheek-
piece comes set from the factory with comb in the lowest position.
2  With Allen screw loose, carefully adjust comb to desired position
(Figure 16) by sliding each post...