NRA Probationary Course

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NRA Probationary Course
Unit 8 The Rifle Sights
Compiled by Dave Burton
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NRAProbationary Course

• Unit 8
• Introduces
• Minutes of Angle
• Vernier Scales
• Elevation Wind Settings
• Different types of sighting system

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Elevation And Distance
When the rifle is close to the target the bullet
hits the centre providing the sights are
correctly set to the bore
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Elevation And Distance
But-
further away, the bullet drops due to gravity and
air resistance
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Elevation And Distance
To hit the target the front of the barrel must be
raised
The longer the range, the more the barrel must be
raised
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ELEVATION

• The further the distance from firer to target,
  the greater the angle x has to be.

trajectory

• x is the angle measured on the sight.

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ELEVATION

• Only a small change of angle is needed at the
  rifle end to make a big difference at the target
  end
• The angle is measured in MINUTES of angle - (one
  minute is 1/60 of a degree)
• At 100 yards, changing the sight by 1 minute,
  changes the fall of shot on the target by 1 inch

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Minutes Of Angle

• A minute of angle is

The adjustment of the REARSIGHT that will cause
the POINT OF IMPACT to move 1 Inch per 100 yards
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ELEVATION

• Therefore
• Distance 1 minute at the target is
• 100yd 1
• 200 yd 2
• 300 yd 3
• etc.

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ELEVATION
1 Minute
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Approx elevation To Allow For Bullet Drop Over
Set Distances
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Elevation
This gives us the standard rises between ranges

• DISTANCE (yds) RISE (mins)
• 200 300 2.5
• 300 500 6.5
• 500 600 4.0
• 600 900 16.0
• 900 1000 7.0

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Standard Elevation Table for 7.62mm
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The Elevation Vernier
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Elevation Vernier Settings
0
1
4
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The Elevation Vernier
Set at 6 minutes of elevation
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The Elevation Vernier
Set at 9 minutes of elevation
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The Elevation Vernier
Set at 13 minutes of elevation
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The Elevation Vernier
Set at 31 minutes of elevation
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The Wind Vernier
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The Effects Of Wind On The Bullet
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Range Flags/Wind Speeds
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The Wind Scale
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The Wind Scale
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2 LEFT
3 RIGHT
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The Wind Scale
Set at 8 min left
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Sight Systems

• Different target shooting disciplines may involve
  different types of sights eg.
• Telescopic sights (F and Match class)
• Leaf sights (Older military rifles)
• Buckhorn sights (Gallery rifles)

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Service Rifle Sights
Note the different method of sight adjustment
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Telescopic Sights
Telescopic sight adjustment may be in the
opposite direction to that of target sights
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Leupold Sight
Telescopic sight adjustment may be in the
opposite direction to that of target sights
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Tasco Sight
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NRA Probationary Course
Compiled by Dave Burton