If you are using a spirit level on your rifle, you may wish
to time the rear sight in vertical plumb with the level
bubble centered. This is only necessary if using a spirit
level on your rifle. Without a level, your sight will be
close enough without adjustment by simply placing the base
on the tang and tightening the mounting screws.
Move the elevation slide up or down and only one of the
marks in between will line up with a mark on the staff. The
difference between .050" and .040" gives you .010" movement.
Place the rifle in a vise or other solid mount and
position so the spirit level is on center. Place the sight
base on the tang and tighten with the mounting screws
provided. Use a small level designed to measure vertical
plumb to check the level against the side of the sight
staff. If rear sight does not read level, it will be
necessary to place shims under one side of the sight base to
establish verticle timing with the spirit level. Often no
shimming is required however, MVA did not make your rifle
and has no control over the alignment and level between your
rifles tang to dovetail. For best accuracy, this condition
should be checked during the mounting process.
Example: Move the elevation slide up or down until
the "0" is inline with "1" on the staff. This is your 1"
setting. Move the elevation slide up until the mark above
the "0" lines up with a mark on the staff. This is the 1.01"
setting, you have "come up" 1 MOA. The process continues
until after five .010" movements the "0" mark will line up
with a new mark on the staff. This would be your 1.050"
setting. This vernier system allows a shooter to keep a log
of sight settings for various ranges and return to a desired
setting accurately. Disregard the "5" on the elevation
slide. The "0" and "5" are always lined up at the same time.
Start with "0" and count up the next four plain marks.
Once the MVA Soule sight is mounted on the rifle you may
wish to sight in the rifle at mechanical zero. This will
allow the optimum use of windage in the sight. The center
mark on the Soule staff should be in line with the single
line on the micrometer mainframe assembly, windage knob at
zero. At this time you should shoot the rifle during a
no-wind condition. Move the front sight .010" in the
opposite direction of the desired impact change (moving
front sight to the left will move your point of impact to
Windage is adjusted by turning the knurled knobs on
either side of the micrometer assembly. Markings on the face
of the staff are spaced at .025" (2.5 MOA). Each mark on the
calibrated windage knob will move the sight .005" (.5 MOA).
The windage knob has five markings, 0 thru 4. Five movements
of .005" equals .025", or one revolution of the windage
knob. To move your point of impact to the right, turn the
knob so that number value increases (0, 1, 2, 3, 4). To move
the sight left, move the opposite direction (0, 4, 3, 2, 1).
Elevation markings on the MVA Soule sight are calibrated
in .010" increments. A .010" movement is approximately 1
minute of angle on rifle with a 30 to 36 inch sight radius.
The spacing of marks on the staff are .050" apart and
labeled every .250" by a number (25, 50, 75, 1, etc.). The
spacing on the elevation slide markings are .040". This
means only the top and bottom marks on the elevation slide
will be in line at the same time with a mark on the staff.
Vertical positioning, front to rear, is set at the
factory. This is adjusted by the positioning of the base
spring. Do not loosen the spring retaining screw or you will
change the vertical position. On bases such as the Stevens
44.5 the spring will have to be removed to gain access to
the mounting screws. On this type of base, first mount the
base. Replace the spring with screw loose. Position the
sight staff vertical and tighten the screw.