Riflescope reticles: GPO, Optisan, Falcon, Dörr and other brands
Third part of the reticle guide, dedicated to the GPO, Optisan, Falcon, Dörr, Discovery, Mueller and Gamo riflescopes available at Planet Shooters. Dimensioned drawings and values come from the manufacturers' official specifications.
For the basic concepts (first and second focal plane, MOA, MRAD, ranging) start from the riflescope reticle guide; the other brands are in the second part.
For each riflescope GPO publishes the reticle coverage in cm at 100 m at maximum magnification. Remember that 10 cm at 100 m corresponds to 1 mrad. In SFP (second focal plane) reticles the values are exact only at that magnification: at half magnification they double. On all SPECTRA models each click moves the point of impact by 1 cm at 100 m (0.1 mrad).
iControl illumination: on the "i" models the light switches off automatically after 3 hours without adjustments and, thanks to the tilt sensor, when the rifle is set down at an angle (beyond 50° sideways or 70° up/down it switches off immediately; between 30–50° sideways or 50–70° up/down after 3 minutes). It switches back on as soon as the rifle returns to position. To deactivate the sensor: with the illumination off, turn the optic upside down by 180° and switch it on at level 6 or higher (the light flashes 3 times). CR2032 battery.
GPO G4i, G4i Fiber and G3i Drive
Dimensioned drawing from the official GPO technical specifications
Unit cm at 100 m
Focal plane SFP – values at maximum magnification
Illumination center dot, iControl
Turrets 1 cm/100 m
Hunting reticles with four posts (G4) or three posts (G3i Drive, for driven hunts). The G4i Fiber has a fiber-optic illuminated dot, "extremely fine and bright", made in Germany. The gap between the posts also serves as a reference for estimating range: for example, on the 1-6x24i at 6x the gap between the horizontal posts of the G4i Fiber covers 200 cm at 100 m.
Model
Mag.
A wire
B post gap
C center → lower post
D posts
E dot
SPECTRA 1-6x24i G4i Fiber
6x
1.8
200
100
7.5
1.8
SPECTRA 1-6x24i G4i
6x
1.0
300
150
4.0
2.5
SPECTRA 1-8x24i G4i Fiber
8x
1.4
150
75
5.6
1.2
SPECTRA 1.5-9x32i / 1.5-9x44i G4i Fiber
9x
1.2
112
66
5
1.2
SPECTRA 2-12x50i G4i Fiber
12x
1.0
100
50
4.0
0.9
SPECTRA 2-12x50i G4i
12x
1.0
200
100
4.0
2.5
SPECTRA 1.6-13x44i G4i Fiber
13x
0.83
92.3
46.15
3.46
0.65
SPECTRA 3-15x56i G4i Fiber
15x
0.7
66
33
2.8
0.58
SPECTRA 2-16x50i G4i Fiber
16x
1.0
100
50
4.0
0.9
SPECTRA 4-16x50i G4i Fiber
16x
2.6
300
150
11.7
1.4
SPECTRA 3-18x56i G4i Fiber
18x
0.58
55
27.5
2.3
0.48
SPECTRA 2.5-20x50i G4i Fiber
20x
0.6
100
50
3
0.5
G3i Drive (SPECTRA 1-6x24i, at 6x): A gap between the horizontal posts 140 cm, B center → lower post 70 cm, C illuminated dot 3 cm, D wire thickness 0.5 cm. Values in cm at 100 m.
How to use it: zero the dot at your usual hunting distance and aim with the dot. To estimate range, compare the outline of the animal with the post dimensions, at the magnification stated in the table.
Dimensioned drawing from the official GPO technical specifications
Unit cm at 100 m
Focal plane SFP – values at maximum magnification
Illumination center dot, iControl
Turrets 1 cm/100 m
Glass-etched four-post reticle with a holdover scale below the center ("with ballistic holdover marks"). At maximum magnification the long hash marks are spaced 10 cm at 100 m (1 mrad) apart and the short ones 5 cm (0.5 mrad). In the drawing it is shown alongside the G4i Fiber.
Letter
Element
cm at 100 m: 2.5-10x44i at 10x / 4-16x50i at 16x / 1.5-9x i at 9x
A
Wire thickness
0.5 / 0.45 / 0.8
B
Gap between the horizontal posts
150 / 180 / 180
C
Central opening around the dot
5 / 6.6 / 12
D
Post thickness
4 / 2.2 / 4
E
Spacing between the long hash marks
10 / 10 / 10
F
Spacing between the short hash marks
5 / 5 / 5
G
Scale length
90 / 80 / 80
H
Illuminated dot
2 / 1.4 / 2.5
How to use it: with the optic at maximum magnification, each long hash mark is worth 1 mrad. Calculate the drop of your load in cm, divide it by the range in hundreds of meters and aim with the corresponding hash mark. At lower magnifications the values increase proportionally.
Dimensioned drawing from the official GPO technical specifications
Unit cm at 100 m (at 18x)
Focal plane SFP – values at 18x
Illumination illuminated reticle, iControl
Turrets 1 cm/100 m
Ballistic reticle with a vertical scale numbered 2-4-6-8 below the center. At 18x the long hash marks are spaced 10 cm at 100 m (1 mrad) apart, so the numbers indicate the mrad of holdover.
Letter
Element
cm at 100 m at 18x
A
Wire thickness
1
B
Gap between the horizontal posts
120
C
Post thickness
4
D
Length of the holdover scale
90
E
Width of the short hash marks
2
F
Spacing between the long hash marks
10
G
Width of the long hash marks
4
H
Spacing between hash marks
5
How to use it: at 18x read the drop in mrad from your ballistic table and aim with the corresponding numbered hash mark (e.g. 4 = 4 mrad). At 9x each hash mark is worth twice as much.
Dimensioned drawing from the official GPO technical specifications
Unit cm at 100 m (at 12x)
Focal plane SFP – values at 12x
Illumination fully illuminated reticle, iControl
Turrets 1 cm/100 m
Ballistic reticle with holdover bars numbered 2 to 5 and wind dots on the same lines. At 12x bars 2, 3, 4 and 5 are located 10, 30, 60 and 100 cm at 100 m below the center (1, 3, 6 and 10 mrad).
Letter
Element
cm at 100 m at 12x
A
Gap between the horizontal posts
120
B
Width of the horizontal scale
100
C
Center → upper post
60
D
Post thickness
5.8
E
Center → lower post
130
F
Length of the vertical scale
120
G
Dot diameter
1.7
H / I
Spacing between long / short hash marks
10 / 5
J / K
Width of long / short hash marks
4 / 2
L / R / M / N
Center → bars 2 / 3 / 4 / 5
10 / 30 / 60 / 100
O
Width of the central bar
30
P
Spacing between the wind dots
5.8
Q
Wire thickness
0.5
GPO does not state which distances the numbered bars correspond to, nor the reference load: match them to distances with a ballistic calculator and verify at the range.
Dimensioned drawing from the official GPO technical specifications
Unit MRAD
Focal plane FFP – values correct at every magnification
Illumination yes, iControl
Turrets 1 cm/100 m (0.1 mrad)
Illuminated long-range reticle with very fine features. According to GPO, holdover is done with the graduated scale below the center and wind correction with the fine lines to the right and left. The hash marks are every 0.5 mrad, with the long ones at every mrad, numbered every 2 mrad (2, 4 … 10).
Letter
Element
cm at 100 m (at 27x)
A
Gap between the horizontal posts
120
B / C
Width of long / short hash marks
6 / 4
D
Wire thickness
0.5
E
Post thickness
5
F
Center → lower post
100
G
Height of the numbers
4
H / J
Spacing between hash marks (0.5 mrad)
5
I / K
Spacing between long hash marks (1 mrad)
10
How to use it: being FFP, 10 cm at 100 m = 1 mrad at any magnification. Measure the error or the drop in mrad and dial the same value (10 clicks = 1 mrad), or aim with the corresponding hash mark.
Dimensioned drawing from the official GPO technical specifications
Unit MIL
Focal plane FFP – values correct at every magnification
Illumination yes, iControl
Turrets 0.1 mrad, 32 mrad of travel
Christmas-tree reticle: each holdover line (numbered every 2 mil) has hash marks for precise wind correction, with rows of dots in between. GPO states that it is identical to the PLR reticle of the GPO TAC 15-45x60 spotting scope, so shooter and spotter use the same references.
Letter
Element
mil
A1 / A2
Wire / post thickness
0.03 / 0.75
C1
Central opening and scale-to-post distance
0.5
C2
Spacing between numbered hash marks
1
C3 / C4 / C5
Spacing between dots
0.5 / 0.25 / 0.5
D1
Center dot
0.05
D2 / D3
Diameter of the tree dots
0.03 / 0.05
L1 / L3 / L2
Length of long / medium / short hash marks
0.5 / 0.25 / 0.12
T
Height of the numbers
0.25
How to use it: aim with the line that corresponds to the drop in mil and move along the hash marks on the same row for wind; or dial the drop and use the horizontal scale.
Dimensioned drawing from the official GPO technical specifications
Unit MOA
Focal plane SFP – values at 27x
Illumination center dot, iControl
Turrets ¼ MOA, 60 MOA of travel
Precision reticle with particularly fine features, a scale numbered 10 and 20 below the center and 10 on the sides.
Letter
Element
Value (GPO spec sheet, at 27x)
A
Center → numbered hash mark 10
10
B
Spacing between the long hash marks
2
C
Spacing between hash marks
1
D
Length of the short hash marks
0.5
E
Wire thickness
0.064
J
Center dot
0.2
GPO lists these values in the "cm / 100 m at 27x" column; the scale in the drawing is numbered 10 and 20, consistent with a MOA reticle. If in doubt, check the optic's manual.
The manufacturer does not publish a dimensioned drawing of the reticle: the manual supplied with the optic is the reference.
Unit MRAD
Focal plane FFP
Illumination yes, iControl with battery warning
Turrets 1 cm/100 m (0.1 mrad)
"MIL-Spec" horseshoe reticle in the first focal plane, so it changes size with magnification. At 1x you aim with the illuminated dot with both eyes open; at higher magnifications you use the circle of the horseshoe. GPO recommends it for distances from 5 to 600 m.
The manufacturer does not publish a dimensioned drawing of the reticle: the manual supplied with the optic is the reference.
Focal plane SFP
Turrets ¼ MOA (0.7 cm at 100 m)
Illumination 4-12x50i: G4i Fiber dot, iControl
The PASSION 3-9x42 and 4-12x42 have a non-illuminated Plex (duplex) reticle, the 4-12x50i the G4i Fiber with illuminated dot. They are hunting reticles without holdover scales: zero them at your usual hunting distance and aim at the center. GPO does not publish the dimensions of the PASSION reticles.
Optisan (Optisan Optics Europe GmbH, Berlin) publishes a spec sheet for each reticle with the focal plane, unit of measurement and the magnification at which the dimensions are exact. The number in the name of the SFP reticles indicates the calibration magnification: MHP10i at 10x, G4Ai12 at 12x.
Optisan F1MRAD16 and F1MRAD24 (EVX Gen II F1)
Official Optisan reticle spec sheet
Unit MRAD
Focal plane FFP – values correct at every magnification
Turrets 0.1 mrad, 10 mrad per revolution
Illumination no
Optisan describes it as a mil reticle "for precision ranging at all magnifications", with a clean field of view and fine wind references. The drawing shows references on the upper post at 0.25, 0.5 and 1.0 mrad from the center, a scale numbered every 5 mrad and Ø 0.1 and 0.05 mrad floating dots as wind references. The 16 is fitted to the EVX Gen II 4-16x44 F1, the 24 to the 6-24x50 F1.
How to use it: reticle and turrets are both in mrad: measure the error on the reticle and dial the same value (10 clicks = 1 mrad), or aim with the scale.
Focal plane FFP – values correct at every magnification
Turrets ¼ MOA, 20 MOA per revolution
Illumination no
MOA version of the same concept: 1.0 and 2.0 MOA references near the center and Ø 0.3 and 0.2 MOA floating dots for wind, with values correct at all magnifications.
Illumination 6 levels with intermediate off positions
Turrets 0.1 mrad, 10 mrad per revolution
Illuminated mil reticle for precision ranging at 10x, with fine wind references: references on the upper post at 0.25, 0.5 and 1.0 mrad from the center. Fitted to the ES 3-12x44i, ES 4-16x44i, EVX Gen II 4-16x44i and 6-24x50i.
How to use it (Optisan spec sheet): at 10x the values are those shown in the drawing. At other magnifications, recalculate: at 5x multiply all values by 2, at 12x divide them by 1.2.
Focal plane SFP – values at maximum magnification (12x)
Illumination no
Turrets ¼ MOA, 12 MOA per revolution
The BCR is a ballistic hunting reticle with drop references below the center; Optisan specifies references out to 500 yd. The Duplex has the same posts without references.
Letter
Element
Value at 12x
—
Drop references below the center
1.55 / 4.5 / 7.52 MOA
—
Tip of the lower post
11.06 MOA
—
Horizontal references / start of the posts
4.0 / 8.0 MOA
—
Post / wire thickness
1.5 / 0.3 MOA
Duplex: 1.5 MOA posts, 0.3 MOA wire, 8.0 MOA from the center to the posts. Optisan does not state the distances of each BCR reference for a specific load: verify them with a ballistic calculator.
Falcon Optical Systems (United Kingdom) publishes the reticle drawings in its manuals, with a lettered legend.
Falcon MP1 SFP (Endura S10i+ 1-10x24)
Official Falcon Optical Systems drawing
Unit MRAD
Focal plane SFP – values exact at 10x
Illumination red, 12 levels with intermediate off positions
Turrets 0.1 mrad, 10 mrad per revolution
LPVO with a floating red dot and mrad scales. The manual specifies that to get exact MRAD values the optic must be set to 10x, marked (10) on the magnification ring. At 10x, 1 mrad on the reticle corresponds to 10 clicks.
Turrets ⅛ MOA, 10 MOA per revolution, about 50 MOA of travel
MOA line reticle for field target and precision shooting. The magnification ring has three small reference circles: at 25x the hash marks are worth 1 MOA, at 12.5x they are worth twice as much, at 50x half as much.
Letter
Element
Value at 25x
A
Width of numbered hash marks
2.0 MOA
B
Spacing between numbers
10.0 MOA
C
Spacing between hash marks
1.0 MOA
D
Scale below the center
20.0 MOA
—
Line thickness
0.1 MOA
1 MOA = 1.047" at 100 yd = 1.141" at 100 m = 0.291 mrad; 1 MOA on the reticle (at 25x) corresponds to 8 clicks of ⅛ MOA. Minimum parallax at full magnification: 9 m (FT) or 10 m (LR). Due to the limited travel, Falcon recommends adjustable rings or tapered bases.
Other Falcon models (S30i+ 3-30x56, S40i+ 4-40x58, T50i+ 5-50x60, X60i Ultra 10-60x56): the Falcon website currently does not allow the official spec sheets of these models to be viewed. We will publish them as soon as they are available; in the meantime, the manual supplied with the optic is the reference.
Dörr reticles
Dörr Milan XP: 4A and Mil Dot
The manufacturer does not publish a dimensioned drawing of the reticle: the manual supplied with the optic is the reference.
Focal plane SFP
Illumination 7 levels, CR2032, last-level memory, switches off after about 2 hours
Turrets ¼ MOA
According to the official Milan XP manual:
4A with red dot on the Milan XP 4i 2-12x42, 3-15x50 and 3-18x56: classic four-post hunting reticle with an illuminated center dot.
Mil Dot with illuminated red cross on the Milan XP MDi 3-15x50: dot reticle for estimating range and holding over.
Parallax adjustable from 10 m to infinity on the 50 and 56 mm models; 110 MOA of travel on the 2-12x42 and 60 MOA on the others. Dörr does not publish the reticle dimensions or the calibration magnification of the Mil Dot: for ranging, verify the values at the range.
Discovery Optics LHD 8-32x50 SFIR and MS 4x32 / 6x32
The manufacturer does not publish a dimensioned drawing of the reticle: the manual supplied with the optic is the reference.
Unit MOA
Focal plane SFP
Turrets LHD: ⅛ MOA · MS: ½ MOA
LHD 8-32x50 SFIR: red-illuminated MOA reticle (6 levels, CR2032), side parallax from 15 yd, 50 MOA of travel. The Discovery technical spec sheet lists it as SFP, while the description of the same product refers to FFP.
MS 4x32 and MS 6x32: airgun optics with a MOA reticle, parallax fixed at 50 yd and 120 MOA of travel.
Discovery does not publish the name and dimensions of the reticles or the calibration magnification. The VT-Z models and the 6-24x50 FFP-L are no longer listed on the official website.
Mueller describes the reticle as a "Mildot" for accurate ranging at 10x. The turrets are in MOA (⅛ MOA per click, 40" at 100 yd of travel) and the side parallax ranges from 10 yd to infinity. To measure, set the optic to 10x and use the mil formulas in the main guide; remember to convert the correction before dialing it (1 mil ≈ 3.44 MOA). On the APV 4.5-14x40 AO Mueller does not specify the reticle; clicks are ¼ MOA and the parallax is adjustable from 10 yd.
The manufacturer does not publish a dimensioned drawing of the reticle: the manual supplied with the optic is the reference.
Magnification fixed 4x
Parallax fixed at 25 yd (23 m)
Riflescope for air rifles with a 30/30 (duplex-type) reticle, 11 mm dovetail mounts included. Zero it at your usual shooting distance and aim at the center. Gamo does not publish the click value or the reticle dimensions.
Values and tables come from the manufacturers' official documentation: always verify the references at the range with your own rifle and load. For installation, leveling and calibration of your optic, you can turn to our workshop.
