VORTEX VMR-1 Reticle Diamondback Tactical 4-12×40 Riflescope User Manual

: June 14, 2024
: VORTEX

Table of Contents

VMR-1 Reticle Diamondback Tactical 4-12×40 Riflescope
Product Information
Specifications:
Product Usage Instructions
MOA Subtensions:
Ranging:
Elevation Holdovers:
Windage and Moving Targets:
Basic Moving Lead Correction:
- FAQ
1. What is the warranty on this product?
2. Where can I find the most up-to-date manual for this

VMR-1 Reticle Diamondback Tactical 4-12×40 Riflescope

Product Information

Specifications:

Reticle type: VMR-1 MOA
Subtensions measured in MOA
Second Focal Plane Reticles

Product Usage Instructions

MOA Subtensions:

The VMR-1 reticle is based on minute of angle (MOA) subtensions.
MOA measurements are based on degrees and minutes: 360 degrees in a
circle, 60 minutes in a degree for a total of 21,600 minutes. These
angular measurements are used to estimate range and correct for
bullet trajectory drop in riflescopes. 1 MOA will correspond to
1.05 inches at a 100 yard distance, 2.1 inches at 200 yards, 3.15
inches at 300 yards, and so on.

Ranging:

MOA measurements are very effective for ranging using a simple
formula. To use this formula, the shooter needs to know the size of
the target, or nearby object, in inches.

MOA Ranging Formula: Target Size (Inches) x
95.5 = Range (Yards) Measured MOA

Using either the vertical or horizontal MOA scale, place the
reticle on a target of known dimensions and read the number of MOA
spanned. You will obtain maximum accuracy in ranging by calculating
exact MOA measurements. MOA should be estimated in halves if
possible. Accurate measuring will depend on a very steady hold. The
rifle should be solidly braced using a rest, bipod, or sling when
measuring. Once you have an accurate MOA reading, use the formula
to calculate the distance.

Example: Ranging a target stand that is six feet (72 inches)
tall at 8 MOA to get 860 yards.

72 x 95.5 / 8 MOA = 860 yds.

Elevation Holdovers:

For elevation holdover correction, use the 12 MOA reticle
holdover for a 600-yard shot with no wind.

Windage and Moving Targets:

When dialing elevation holdovers, the center horizontal
crosshair will be used for windage or moving target leads. MOA
marks on the horizontal and vertical crosshairs are graduated in 2
MOA increments.

For basic windage correction on the center crosshair, use the
MOA marks on the horizontal crosshair graduated in 2 MOA
increments.

Example: 10 MOA reticle correction for a 20 mph wind at 700
yards. Elevation is already dialed into turret.

Basic Moving Lead Correction:

When estimating moving target leads, use the MOA marks on the
center horizontal crosshair. Estimating moving leads will require
knowing yardage distance, wind speed, moving target speed, and
total bullet flight times, including rifle lock time. Bullet flight
times can be roughly calculated based on feet per second velocities
or a ballistic calculator.

Example: 9.5 MOA reticle correction for a target moving at 3 mph
at a distance of 800 yards. No wind. Elevation already dialed into
turret.

FAQ

1. What is the warranty on this product?

The product comes with a VIP WARRANTYTM, which includes an
unconditional lifetime warranty. Vortex Optics promises to repair
or replace the product free of charge, without the need for
registration, box, or receipt.

2. Where can I find the most up-to-date manual for this

product?

You can find the most up-to-date manual for this product on the
Vortex Optics website at VortexOptics.com

RETICLE MANUAL

VORTEX® VMR-1 MOA RETICLE
You have purchased a Vortex® riflescope equipped with the VMR-1 reticle. Designed to maximize long distance shooting and ranging abilities, the VMR-1 MOA reticle can be used to effectively determine ranges, holdovers, windage corrections, and moving target leads.

MOA Subtensions
The VMR-1 reticle is based on minute of angle (MOA) subtensions. MOA measurements are based on degrees and minutes: 360 degrees in a circle, 60 minutes in a degree for a total of 21,600 minutes. These angular measurements are used to estimate range and correct for bullet trajectory drop in riflescopes. 1 MOA will correspond to 1.05 inches at a 100 yard distance, 2.1 inches at 200 yards, 3.15 inches at 300 yards, and so on.

VMR-1 MOA Reticle 2

0.15 1.5

1.7

.7

4

18

2

30

Subtensions measured in MOA. Reticle image shown for representation only.
3

Second Focal Plane Reticles
Second focal plane (SFP) reticles are located near the scope’s eyepiece behind the image erecting and magnifying lenses. This style of reticle does not visually change in size when you change the magnification. The advantage of an SFP reticle is that it always maintains the same, ideally sized appearance. When shooting with this SFP scope, be aware that the listed reticle subtensions used for estimating range, holdover, and wind drift correction are only correct at the highest magnification for all models.
Ranging
MOA measurements are very effective for ranging using a simple formula. To use this formula, the shooter needs to know the size of the target, or nearby object, in inches.
MOA Ranging Formula Target Size (Inches) x 95.5 = Range (Yards) Measured MOA
Using either the vertical or horizontal MOA scale, place the reticle on a target of known dimensions and read the number of MOA spanned. You will obtain maximum accuracy in ranging by calculating exact MOA measurements. MOA should be estimated in halves if possible. Accurate measuring will depend on a very steady hold. The rifle should be solidly braced using a rest, bipod, or sling when measuring. Once you have an accurate MOA reading, use the formula to calculate the distance.
4

Ranging a target stand that is six feet (72 inches) tall at 8 MOA to get 860 yards.

72 x 95.5 8 MOA

= 860 yds.

5

Elevation Holdovers
Once you’ve calculated distance using the VMR-1 or a laser rangefinder, the VMR-1 can be used for rapid holdover correction of the bullet drop. Vortex Optics highly recommends shooters learn their bullet drop numbers and windage/lead corrections in MOA rather than inches or Milliradians (MRAD). Remember that 1 MOA will correspond to 1.05 inches at a 100 yard distance, 2.1 inches at 200 yards, 3.15 inches at 300 yards, and so on. Since this VMR-1 reticle is marked in MOA, it is an easy job to quickly select the correct drop reference line once the shooter knows the bullet drops and windage/ lead corrections in MOA. If the shooter prefers to dial the holdover for bullet drop using the elevation knob, knowing bullet drops in MOA will allow for much faster adjustments because the MOA can be quickly read on the elevation knob.
12 MOA reticle holdover correction for 600-yard shot. No wind.

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Windage and Moving Targets
The VMR-1 reticle is highly effective when used for wind and moving target leads. Using the reticle for effective windage and moving leads requires a thorough knowledge of your cartridge’s ballistic performance under varying conditions, and experience in reading wind strengths and target speeds. As in bullet drops, it is imperative the shooter learn their particular weapon’s windage/moving target corrections in MOA rather than inches or MRAD. Always hold the reticle into the wind when correcting for wind drift.
When dialing elevation holdovers, the center horizontal crosshair will be used for windage or moving target leads. MOA marks on the horizontal and vertical crosshairs are graduated in 2 MOA increments.
Basic Windage Correction on Center Crosshair
When dialing elevation holdovers, the center horizontal crosshair will be used for windage or moving target leads. MOA marks on the horizontal crosshair are graduated in 2 MOA increments.

10 MPH wind Full value wind at 90°

10 MOA reticle correction for 20 mph wind at 700 yards. Elevation is already dialed into turret.

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Basic Moving Lead Correction
When estimating moving target leads, use the MOA marks on the center horizontal crosshair. Estimating moving leads will require knowing yardage distance, wind speed, moving target speed, and total bullet flight times, including rifle lock time. Bullet flight times can be roughly calculated based on feet per second velocities or a ballistic calculator.
Note: Correctly estimating moving leads is very difficult and requires considerable practice and knowledge beyond the scope of this manual.

Direction of Movement
9.5 MOA reticle correction for a target moving 3 mph at a distance of 800 yards. No wind. Elevation already dialed into turret.

VIP WARRANTYTM
OUR UNCONDITIONAL PROMISE TO YOU.
We promise to repair or replace the product. Absolutely free.
Unlimited. Unconditional. Lifetime Warranty.
You do not have to register, save the box, or a receipt for the Warranty to be honored.
Learn more at VortexOptics.com
service@VortexOptics.com · 1-800-4VORTEX Note: The VIP WarrantyTM does not cover loss, theft, deliberate damage, or cosmetic damage not affecting product performance.
For the most up to date manual visit VortexOptics.com

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