Ruger M-77 Mark II Instruction Manual

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AMMUNITION
RUGER®M-77®MARK IIrifles are chambered for many of the most
popular factory-loaded cartridges manufactured in accordance with U.S. industry
practice. The particular caliber for each rifle is rollmarked on the barrel. Use
cartridges only of the designated caliber that is marked on the barrel. Please see
AMMUNITION WARNING below and LOADING WARNING on page 13.
Ruger M77 Mark II Express bolt action rifles are chambered for either the .270,
.300 Magnum, 7mm, .338 Magnum, or .30/06 cartridges in...

Know the caliber of your rifle you are loading and load
cartridges of only that caliber into it!
Before loading, be certain the primer of each cartridge is seated
flush with, or below, the surface of the cartridge case base. A
cartridge discharged by the closing of the bolt can result in
possible serious injury to the shooter and those nearby.
If a cartridge does not chamber readily, do not force it. Check
the bore and chamber to be certain that each cartridge is the
proper caliber and of correct...

14
To single-load:(Safety should be in “Load-Unload” position).Place a cartridge
directly into the chamber and close the bolt. If there are cartridges in the
magazine and it is desired to single load a cartridge directly into the chamber,
depress the top cartridge and push the bolt forward until the bolt face is well
ahead of the rim of the top cartridge in the magazine. Then, close the bolt.
!WARNING – HANDLING
WARNING: DO NOT TOUCH THE TRIGGER
UNTIL YOU ARE ACTUALLY READY
TO FIRE THE RIFLE.
!
Never...

When firing the M-77®Mark II be sure that
bystanders are well clear of the shooter and
standing a safe distance to the rear. Empty
cartridge cases are hot and are normally ejected
from the rifle to the right. They could cause
injury to any person who is standing too closely
alongside the shooter. Shooters who fire right-
hand rifles from their left shoulder should be
particularly cautious concerning ejected
cartridge cases and the back of the bolt as it is
drawn rearward.
EJECTED BRASS IS HOT
!
15
TO...

!WARNING – UNLOADING
16
Removing cartridges from the magazine
does not prevent the rifle from being fired!
When there is a cartridge in the chamber
and the safety selector is in the “Fire”
position, the cartridge will discharge if the
trigger is pulled. It is absolutely essential
for the user to know how to completely
unload it.
“Completely” means emptying the
magazine and removing a chambered
cartridge. The safety selector should
always be in the “Load-Unload” position
when the rifle is being...

17
!WARNING – MALFUNCTIONS

If a cartridge hangs up, jams, or binds when
being chambered or when being fed from the
magazine into the chamber, do not attempt to
force it into the chamber by pushing or striking
the bolt handle.
Most failures of a cartridge to feed or to
chamber are caused by improper loading of the
magazine or ammunition that is incorrect or
defective.
Whatever the cause, the gun user must, above
all, recognize that jams can result in the very
potentially dangerous situation of a...

18
TO MINIMIZE MALFUNCTIONS (“JAMS”)
Firearms of all makes and types are susceptible to occasional malfunctioning due
to a cartridge not feeding from the magazine to the chamber, or due to a
cartridge or fired case not being extracted and ejected.
To minimize the possibility of such occurrences the gun user should:
– Use ammunition of the correct caliber and type which is loaded to U.S.
Industry Specifications. Do not use cartridges that are deformed, or
cartridges that have been reloaded.
– Clean and...

19
Before attempting to disassemble the rifle for the first time,  study the parts
drawing and parts list so as to be familiar with the relative position, appearance
and name of each part. Carry out the disassembly slowly and carefully note the
position of the part in the gun before starting to remove it. If a part is under
spring tension (such as, the Safety Selector, Bolt Stop, Trigger) remove it
cautiously and anticipate the direction the spring and plunger are most likely to
“jump.”
WARNING: If a...

20
7.To remove the sear:
a. Press out the sear pivot pin.
b. Turn receiver upside down and slide sear forward. Sear will drop out of the
top slot in the receiver.
8.To remove safety assembly:
a. Rotate the safety selector so that the upper section is positioned fully over
the center of the receiver tang.
b. While holding the safety selector in place with thumb and forefinger, slide
the retainer up out of receiver. (Caution: Safety Selector is under spring
tension from a spring and plunger acting against...

21
5.To reassemble firing pin assembly into bolt:
Screw the assembly fully into the bolt. The assembly is properly positioned in
the bolt when the flat on the bottom right side of the bolt sleeve (front of bolt
facing you) is aligned with the flat on the bottom end of the bolt handle. Note:
There is a shallow notch on the rear end of the bolt body – at the end of the
cam cut – into which the nose of the cocking piece ‘fits.’ When the firing pin
assembly is being turned into the bolt body, it may be...