Ruger 77/50 Instruction Manual

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3.To replace the trigger:
a. Rotate safety to “fire” position.
b. Place the trigger/sear spring over the dimple in the trigger.
c. Assemble the trigger while aligning the spring with the dimple on the
sear.
d.  While holding the trigger in position, replace the trigger pivot pin.
4.To replace the breech plug:
a. Lubricate the br
eech plug/nipple
assembly threads thoroughly with a
good quality black powder gun grease.
(See Figure 27) Do not lubricate the
back or nipple portions of the breech
plug....

5.To replace the barrel/receiver assembly into the stock: (Caution: Be certain
that the pivot pins are not protruding from either side of the receiver.)   
a.  Carefully install the barrel/receiver assembly into the stock, making sure
the barrel/receiver assembly is in the most rearward position.                   
(See Figure 29)
b. Install the trigger guard and screws (shorter screw in front).
(See Figure 30)
29
C
A
B SHORT SCREW
IN FRONT
30
REINSTALL TRIGGER GUARD
INSERT BARRELLED ACTION INTO STOCK
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c. Slide barrel band over
barrel and rearward onto
the stock forend. Tighten
band screw when in place.
Replace ramrod in stock
through thimble under
barrel. (See Figures 31a,
31b, & 31c) Ramrod head
should rest in barrel cut
beneath muzzle.
Ramrod will not enter
stock easily if band
screw is tightened
excessively.
6.To assemble the bolt:
a. Lubricate the bolt sleeve
threads and the angled
cocking cam surface on the
rear of the bolt. Slide the
bolt sleeve assembly into
the bolt from the rear. Screw
the...

34
c. Carefully rotate
counterclockwise until
cocking piece snaps into
small notch and no
further!Only when the
bolt is correctly
assembled should it be
inserted into the
receiver. (See Fig. 34)
d. With safety in
“load/unload” (middle)
position, insert the bolt
into the receiver. (See
Fig. 35)
REGARDING ACCURACY
The accuracy of any muzzleloading rifle can vary depending upon the make and
type of projectiles and powder charge used in it. Such being the case, if your
RUGER
®MODEL 77/50 rifle does not...

TO CLEAR A MALFUNCTION (“JAM”)
If the rifle becomes difficult to operate, this can usually be traced to three basic
causes (followed by the appropriate corrective action):
1. Accumulated black powder fouling (cease firing & clean gun).
2. Percussion cap fragments inside receiver (carefully remove).
3. Percussion caps not fully seated on nipples (carefully reseat). Be sure you are
using the correct size cap (#11).
If it becomes necessary to disassemble the rifle to clear a jam, be sure to unload
it...

MAINTENANCE OF
STAINLESS STEEL COMPONENTS
Firearms and components made of stainless steel are relatively more resistant to
corrosion than those of blued steel. However, in the interest of proper operation and
long life of a stainless steel firearm, inspect it frequently and clean, lubricate and
apply an appropriate rust preventative.
Sometimes surface discoloration occurs from perspiration or from contact with
some types of gun cases. Rusting may occur as a result of the firearm being exposed
to...

7. The bottom finish of a telescopic sight mounted over the action may be
damaged by hot gasses and cap fragments exiting the breech area when firing.
This should not affect the scope’s performance. Carefully clean all scope lenses
of fouling when you clean your rifle.
PLEASE NOTE THAT SOME STATES RESTRICT TELESCOPIC SIGHTS ON
MUZZLELOADERS USED FOR HUNTING -- CHECK YOUR LOCAL GAME
LAWS.
SIGHT ADJUSTMENT
The folding leaf rear sight is adjustable for elevation. The slide must be moved
one graduation to...

38
SERVICE AND PARTS POLICY
If you have any question with regard to the performance of your RUGER®
MODEL 77/50 rifle please write or call (603-863-3300) our Product Service
Department, 411 Sunapee Street, Newport, New Hampshire 03773, fully
describing all circumstances and conditions involved. If you should return your
rifle to the factory for repair, or order parts for it, please comply with the
following suggestions for prompt service:
WARNING: BEFORE SHIPPING ANY FIREARM, BE
ABSOLUTELY CERTAIN THAT IT...

It is the purchaser’s responsibility to be absolutely
certain that any parts ordered from the factory are
correctly fitted and installed. Firearms are
complicated mechanisms and IMPROPER
FITTING OF PARTS MAY RESULT IN A
DANGEROUS MALFUNCTION, DAMAGE TO THE
FIREARM, AND SERIOUS INJURY TO THE
SHOOTER AND OTHER PERSONS. The
purchaser and installer of parts must accept full
responsibility for the correct adjustment and
functioning of the firearm after such installation.
PARTS MUST FIT CORRECTLY
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ORDERING...

40
PARTS LIST AND SUGGESTED RETAIL PRICESDesign, prices and specifications subject to change without notice.
SPECIFY MODEL AND CALIBER WHEN ORDERINGRUGER
®MODEL 77/50 PERCUSSION RIFLE
(See Exploded View on Page 42)
Caliber
Part Name Part No. Model .50 Blued Stainless
Accessory Kit - Includes: Cleaning Tube; J29001 All Models • $   9.75 –
Breech Plug Wrench; & Wrench Handle
* Barrel 0J8012 77/50-RS, 77/50-RSO • 65.00 –
* Barrel K0J8012 K77/50-RSBBZ • – $ 118.00
Barrel Band J06801 All Models • 6.00 –...