Ruger 77/50 - Manual (Page 37)

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 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 exactly fits 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. 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.
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.
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