Ruger M-77 Mark II Instruction Manual

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CARE AND CLEANING
A firearm must be free of rust, dirt, grease and firing residues to function safely
and reliably. Periodic maintenance, which includes inspection of components to
determine if they are in proper working order, is absolutely essential. Firing
deposits particles of bullet lubricant and powder in the bore, chamber, bolt,
receiver, magazine and other parts of the rifle. There is no fixed rule as to how
frequently the cleaning should be carried out, but the alert gun owner soon
learns that any firearm functions most reliably and accurately when it is free of
accumulations of grease and other firing residues.
Basic cleaning equipment includes: A correct size cleaning rod equipped with
bore brushes (fiber and brass) and a tip in which a cloth patch can be inserted,
patches, powder solvent, lubricant, small lint-free cloths and a toothbrush. Use
correct size patches and brushes. Larger sizes will bind in the bore and can be
very difficult to remove! Insert rod from the chamber end of the barrel and push
firmly so the patch or brush emerges from the muzzle. Don’t reverse the rod
when a brush or patch is being used – it may bind. Don’t use patches or brushes
dripping with solvent or oil. Use rod and brushes with care so as not to damage
gun.
1. For routine cleaning it is necessary only to remove the bolt and open the
floorplate.
2. Push-pull a solvent-wetted patch through the bore several times. Next, using a
solvent-wetted brush, run it the full length of the bore as many times as is
necessary to completely remove all foreign matter from the bore and chamber.
Dry the bore with clean patches and examine it. If bore remains fouled, repeat
the brushing. Complete the cleaning by dry-patch wiping of bore and chamber.
3. Use a clean, solvent-wetted patch to remove firing residue and dirt from all
“reachable” surfaces inside the receiver. Use the solvent-wetted toothbrush to
dislodge caked dirt from all parts of the bolt assembly and from surfaces inside
the receiver that can’t be reached with a patch. Use cleaning patches or the
cloth to remove the solvent.
4. Wipe all surfaces – internal and external – with a very light coat of oil. Oil and
similar preparations “collect” dirt particles which can interfere with reliable
functioning of the rifle. Therefore, use these preparations very sparingly. A
drop of oil applied to the bolt assembly components, the pivot points of the
trigger mechanism, the safety, the bolt stop, and the magazine latch, will work
into all the parts that need lubrication.
5. Reassemble the rifle and carefully wipe all solvent, lubricating and preservative
preparations from the stock.
WARNING: BEFORE CLEANING, BE CERTAIN THE RIFLE
AND ITS MAGAZINE CONTAIN NO CARTRIDGES.! 
						

							6. If the rifle is to be stored for an extended period, clean the rifle thoroughly.
Disassemble to the extent described elsewhere in this manual, taking care to
put pins and similar easily mislaid and “rolling” components in a tray. Rewipe
all surfaces with preservative oil. Reassemble and store properly.
STORAGE
GUNS SHOULD NOT BE STORED LOADED!
Do notstore the rifle in a leather case or scabbard. Leather attracts moisture,
even though it may appear to be dry.
TO RENDER THE RIFLE INOPERATIVE FOR SAFE STORAGE
With the muzzle pointed in a safe direction, remove the magazine (if applicable),
open the bolt, and check the chamber and the magazine to be sur
e the rifle is
completely unloaded!Depress the bolt latch, located at the left rear of the
receiver. Now pull the bolt fully to the rear. The bolt will come out the rear of the
receiver.
Store the rifle and the bolt in different locations. When disassembled in this
manner, the rifle is inoperable. It is impossible to fire the rifle until the bolt has
been correctly replaced into the rifle’s receiver.
To reassemble the rifle for firing, reinsert the bolt into the receiver from the rear.
With the muzzle pointed in a safe direction, close the bolt. Check to be sure that
the bolt can be operated fully and freely. The rifle is now reassembled and can be
loaded and fired normally.
23
!WARNING – LUBRICATION
OIL
Firing a rifle with oil, grease, or any other material even
partially obstructing the bore may result in damage to the
rifle and serious injury to the shooter and those nearby.
Do not spray or apply lubricants directly on ammunition.
If the powder charge of a cartridge is affected by the
lubricant, it may not be ignited, but the energy from the
primer may be sufficient to push the bullet into the bore
where it may become lodged. Firing a subsequent bullet
onto the obstructed bore may damage the rifle and cause
serious injury or death to the shooter and those nearby.
Use lubricants properly. You are responsible for the proper
care and maintenance of your firearm.
IMPROPER LUBRICATION
DESTROYS GUNS
USE THE LOCKING DEVICE SUPPLIED WITH THE RIFLE FOR STORAGE.
(SEEPAGE6) 
						

							MAINTENANCE OF
STAINLESS STEEL RIFLES
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 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
moisture, salt air or chemicals.
Minor discoloration can usually be removed by rubbing the stainless area with an
abrasive ink eraser, crocus cloth, or a “metal polishing” compound. When using
any of these abrasives, proceed with care and use light pressure to achieve a
blending of “color” with those areas that are not discolored.
Never place or store any firearm in
such a manner that it may be
dislodged. Firearms should always be
stored securely and unloaded, away
from children and careless adults. Use
the locking device originally supplied
with this firearm for storage.
The use of a locking device or safety
lock is only one aspect of responsible
firearms storage. For increased safety,
firearms should be stored unloaded and
locked in a location that is both
separate from their ammunition and
inaccessible to children and any other
unauthorized person.
STORE SECURELY & UNLOADED
!WARNING – STORAGE
While the rifle is less likely to be used by unauthorized persons when
disassembled in the above manner, it is always safest to store a firearm with
the supplied locking device correctly installed, or to store the firearm in a gun
safe or other secure location, away from children and unauthorized adults.
Guns should always be stored securely, unloaded
and separate from their
ammunition.
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							25
External surfaces most subject to rusting from handling, or from exposure to the
elements should be cleaned and wiped dry after use or after exposure to adverse
conditions. If the rifle is to be stored, coat it with a light film of oil or
preservative. Where the rifle is in continuing use, and the presence of oil or
grease would be objectionable, then the external surfaces can be coated (after
cleaning and drying) with a paste wax formulated for use on metals. Apply the
wax sparingly, allow time for it to dry hard, then buff lightly with a soft cloth.
When applying the wax, take care that it does not get into the mechanism or on
the functioning parts or in the bore.
ATTACHING RUGER SCOPE RINGS
Each Ruger telescope ring is a mated assembly of a top and a base. Do not mix
the parts of the two ring assemblies as they are not interchangeable. On the
underside of each mounting ring assembly there is an integral lug, located off
center with respect to the front and back sides of the mount. The lug is nearer to
the front surface. By reference to the lug, the mounting ring can be correctly
assembled with the front of the ring toward the muzzle of the rifle.
1. Disassemble one ring and reassemble over the scope body between the turret
and the eyepiece. Remember - the lug on the base should be on the front side
of the scope.
2. Install the four top screws. Do not tighten.
3. Disassemble the other ring and install it on the forward section of the scope
tube with the lug forwardly also. Install the four top screws. Again, do not
tighten.
4. Assemble the rings to the receiver with the lugs engaging the recesses in the
top surface of the receiver. Tighten the clamp nuts so that the rings are locked
to the semicircular cuts on the sides of the receiver.
5. Rotate the scope until cross-hairs are aligned properly and slide scope to
desired eye relief. Then tighten the eight top screws each a bit at a time to grip
the scope body.
6. Sight in according to the directions with your scope.
SIGHT ADJUSTMENT
(For Standard Rifles Equipped With Open Sights)
The folding leaf rear sight is adjustable for elevation and windage. The slide must
be moved one graduation to change the point of impact by approximately one
inch at 25 yards. Shooting to determine the slide setting for ‘zero’ at a particular
distance should be done from a bench rest and over a measured distance. Use
only a small screwdriver with a blade tip that exactlyfits the screw-head. Loosen
the screws only slightly so the slide doesn’t move too freely. Move the slide in the
direction you want the point of impact of the bullet to move. When the slide is
positioned at the desired height, carefully tighten both screws.
Lateral (windage) adjustment is made by “drifting’ the sight base in its slot. To
move the sight, loosen the slotted screw (in the front section of the base) until 
						

							the sight can be moved. Place a short brass rod against the sight base (and only
the base) and tap the sight in the direction you wish to move the point of impact,
then tighten the slotted screw.
NOTE:The ‘rule’ of rear sight adjustment is: Move the sight in the direction
that you want the point of impact of the bullet to move. As examples, to raise the
point of bullet impact, raise the elevation slide (blade). To move the point of
bullet impact to the right, move the sight to the right.
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SUGGESTED SIGHT PICTURE
Top of front sight even with top of
rear sight slide. Front sight
centered in notch of rear sight
slide. Target bull’s-eye centered on
top of front sight.
SIGHT PICTURE AND ADJUSTMENT FOR
MAGNUM AND EXPRESS MODELS ONLY
Both the Ruger Magnum and Express bolt action rifles are equipped with special
Express type folding leaf rear sights mounted on a base dovetailed into the solid
barrel rib. The nonfolding leaf is set for approximately 50 yards. Use whichever
leaf is appropriate for the type of shooting you anticipate. Changes in elevation
can be made by raising or lowering the different sight leaves.
Lateral (windage) adjustment is made by loosening the rear sight base lock screw
(located atop the rib immediately behind the rear sight base) and carefully
moving the entire base in the direction you wish to move the bullets point of
impact. Tighten the screw securely before shooting the rifle. Repeat as necessary
until the rifle is zeroed.
SIGHT PICTURE FOR MAGNUM
AND EXPRESS MODEL
Front sight bead center in
V-notch of rear sight. Target
placed directly above bead. 
						

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SERVICE AND PARTS POLICY
If you have any question with regard to the performance of your RUGER®
M-77®MARK IIrifle please write or call (603-865-2442) our Product Service
Department in 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
AND ITS MAGAZINE ARE UNLOADED. DO
NOT SHIP CARTRIDGES WITH A FIREARM.
!
SHIPPING FIREARMS FOR REPAIR
RUGER M-77®MARK II rifles returned to the factory for repair should be
sent to: Sturm Ruger & Company, Inc., Product Service Department, 411 Sunapee
Street, Newport, New Hampshire 03773. Telephone (603) 865-2442.
Guns should be sent prepaid. We will not accept collect shipments.
The Federal Gun Control Act, as well as the laws of most States and localities, do
not prohibit an individual (who is not otherwise barred from purchasing or
possessing a firearm) from shipping a firearm directly to the manufacturer for
repair. However, before you ship your rifle to us, be certain that your State or
locality does not have a law or regulation which will prohibit you from receiving
the rifle from us after it has been repaired. If such receiving is prohibited, then
please have a Federally Licensed firearms dealer ship the gun to us. If your rifle is
sent to us by a dealer, it will be returned to him after being repaired. If a handgun
(pistol or revolver) is shipped by an individual who does not hold a Federal
Firearms License, it must be shipped via U.P.S. (Next Day Air). Persons who do not
hold a Federal Firearms License are prohibited by Federal law from shipping a
handgun by Mail. Handguns mailed in violation of the law are impounded by the
Post Office.
DO NOT SEND GUN BOXES OR LITERATURE THAT YOU CONSIDER TO BE
COLLECTOR’S ITEMS – THESE ARE INVARIABLY DAMAGED OR DESTROYED
IN SHIPMENT.Please do not include rifle case, sling, telescopic sights or custom
accessories with a firearm being shipped to the factory for service. Rifles and
shotguns may be shipped via Parcel Post. Always insure your shipment.
Enclose a letter which includes your name, address, telephone number, serial
number and model of the firearm. Describe in detail the trouble you have
experienced with your firearm, or the work you wish to have done. Merely stating
that the firearm “needs repair” is inadequate information. 
						

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!WARNING – PARTS PURCHASERS

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 rifle after such installation.
PARTS MUST FIT CORRECTLY
ORDERING PARTS
Please contact the New Hampshire Product Service Department for parts
availability and current prices. All parts orders for theRUGER®M-77®
MARK IIshould be sent to: Sturm, Ruger & Co., Inc., Product Service
Department, 411 Sunapee Street, Newport, New Hampshire, 03773, 603-865-
2442. We cannot comply with open account or C.O.D. requests. Payment in the
form of a check, money order, Visa or Mastercard must accompany your order.
Credit Card orders must include the account number, expiration date and
whether it is a Visa or Mastercard account. Minimum parts order is $1.00 plus a
$3.50 shipping and handling charge. Order parts by Part Number and Part Name
and include the entire serial number of the firearm for which the parts are being
ordered. There is a minimum net labor charge of $20.00 plus $12.00 shipping
and handling if the parts are factory fitted. All factory-fitted parts are fitted on an
exchange basis only. We will not return the replaced parts.
Because the receiver of the M-77
®MARK IIrifle is a serial numbered
component, it is defined as a “firearm” by Federal law and is not sold as a
separate component.
*Parts designated by an asterisk must be factory fitted. These parts are fitted on
an exchange basis only. We will not return the replaced parts. We will not return
any part that is broken, malfunctioning, badly worn or has been modified. See
“Warning — Parts Purchasers”, above.
CAUTION: Firearm users are cautioned that a gun containing
modified, broken, malfunctioning, or badly worn parts should not
be fired.
!
Work performed will bear a net minimum labor charge of $20.00 plus a $12.00
shipping and handling charge. The charge for rebluing the M-77®MARK II
rifle is $50.00 plus a $12.00 shipping and handling charge. Custom gunsmithing
service for nonstandard alterations are NOT AVAILABLE from Ruger Product
Service Departments. 
						

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RUGER
®M77
®
MARK II RIFLE
PARTS LIST
Design, prices and specifications subject to change without notice.
SPECIFY MODEL AND CALIBER WHEN ORDERING
(See Exploded Views on Pages 36, 37 & 38)
Part Name Part No. Model
* Barrel - Blued 0D8014 Standard, Ultra Light, Left-handed - Blued Models
* Barrel - Stainless K0D8014 Ultra Light, Left-handed, Sporter - Stainless Models
* Barrel - Blued 0D8080 Magnum
* Barrel - Blued 0D8055 Express
* Barrel - Blued 0D8004 International
* Barrel - Stainless K0D8062 Target
* Barrel - Blued 0D8085 Compact
* Barrel - Stainless K0D8085 Compact
Barrel Band, Not Illustrated D-66 Magnum  .416 Rigby
Barrel Band, Not Illustrated D06602 Magnum  .375 H & H
* Bolt Assembly, Complete - Blued 70011 All Blued Models
* Bolt Assembly, Complete - Stainless 70010 All Stainless Models
Bolt Stop - Blued D-53 All Blued Models
Bolt Stop - Stainless KD-53 All Stainless Models
Bolt Stop Plunger D-56 All Blued Models
Bolt Stop Plunger KD-56 All Stainless Models
Bolt Stop Plunger Spring D-57 All Models
Bolt Stop Plunger Spring Retaining Pin D-59 All Blued Models
Bolt Stop Plunger Spring Retaining Pin KD-59 All Stainless Models
Bolt Stop Stud Bushing D-55 All Blued Models
Bolt Stop Stud Bushing KD-55 All Stainless Models 
						

							Part Name Part No. Model
Bolt Stop Stud Screw - Blued Models D-54Standard, Ultra Light, Left-handed, Express, Magnum, International, Compact
Bolt Stop Stud Screw - Stainless Models KD-54 Ultra Light, Left-handed, Sporter, Compact
Bolt Stop Stud Screw KD-54T Target
Center Mounting Screw D04700 All Blued Models
Center Mounting Screw KD04700 All Stainless Models
Cocking Piece, Not Illustrated - Blued D01801 Standard, Ultra Light, Express, Magnum, International, Compact
Cocking Piece, Not Illustrated - Stainless KD01801 Ultra Light, Sporter, Compact
Cocking Piece, Not Illustrated D01803 Left-handed - Blued Model
Cocking Piece, Not Illustrated KD01803 Left-handed - Stainless Model
Cocking Piece, Not Illustrated KD01801T Target
Ejector - Blued D00803 All Blued Models
Ejector - Stainless KD00803 All Stainless Models
Ejector Pivot Pin KD09000 All Models
Ejector Spring KD00900 All Models
Escutcheon, Not Illustrated D05100 Magnum
Extractor KD01434 All Models
Extractor Band KD-15 All Models except Target Model
Extractor Band KD-15T Target
Ferrule, Left Side, 3 Req’d W01015 Standard & Ultra Light Models with Synthetic Stock
Ferrule, Right Side, 3 Req’d W01014 Standard & Ultra Light Models with Synthetic Stock
* Firing Pin Assembly - Blued D21102 All Blued Models except Left-handed Model
* Firing Pin Assembly - Stainless KD21102 All Stainless Models except Left-handed Model
* Firing Pin Assembly - Blued D21105 Left-handed - Blued Model
* Firing Pin Assembly - Stainless KD21105 Left-handed - Stainless Model
Firing Pin Cross Pin D-19 All Models
Firing Pin Spring D-135 All Models
Floor Plate D00501 Magnum
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							Part Name Part No. Model
Floor Plate Assembly - Alloy, Long Action D20511 Express
Floor PlateAssembly - Satin Finish,KD20511 All Models with Laminated Stocks
Long Action
Floor Plate Assembly - Aluminum - Blued D20506 Standard, Ultra Light, Left-handed, International, Compact - Blued Models
Floor Plate Assembly - Aluminum - Clear D20503 Ultra Light, Left-handed, Target, Sporter, Compact - Stainless Models
Floor Plate Hinge - Blued Models D-7 Standard, Ultra Light, Left-handed, Express, Magnum, International, Compact
Floor Plate Hinge - Stainless Models KD-7 Ultra Light, Left-handed, Sporter, Compact
Floor Plate Hinge KD-7T Target
Floor Plate Latch - Blued ModelsD03100Standard, Ultra Light, Left-handed, Express, Magnum, International, Compact
Floor Plate Latch - Stainless Models KD03100 Ultra Light, Left-handed, Sporter, Compact
Floor Plate Latch KD03100T Target
Floor Plate Pivot Pin D-6 All Blued Models
Floor Plate Pivot Pin KD-6 All Stainless Models
Forearm Insert, Right Side, Black Plastic J00430 Standard & Ultra Light Models with Synthetic Stock
Forearm Insert, Left Side, Black Plastic J00431 Standard & Ultra Light Models with Synthetic Stock
Forearm Insert, Right Side, Wood J00411 Standard & Ultra Light Models with Synthetic Stock
Forearm Insert, Left Side, Wood J00412 Standard & Ultra Light Models with Synthetic Stock
Front Mounting Screw D04601 All Blued Models
Front Mounting Screw KD04601 All Stainless Models
Front Sight Base - Blued D06502 International
Front Sight Base - Blued D06507 Express
Front Sight Base - Blued S06502 Magnum
Front Sight Base - Stainless KS06500 Stainless Models w/Sights
Front Sight Base Set Screw D-70 Standard & Sporter Models w/Sights, Express, Magnum, International
Front Sight Blade Assembly D06702A Standard & Sporter Models w/Sights, International
Front Sight Blade Assembly D06709A Express
Front Sight Blade Assembly S06702A Magnum
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