.177 · .22 · .25

Air Rifle BDC
Scope Reticle Plotter

Enter your pellet velocity and zero distance. Reticle Plotter calculates exact holdover positions for every target distance and places BDC marks directly onto your scope reticle. No BC needed for air rifles.

Plot My ReticleHow It Works

Supported calibres

Settings guide for the three main air rifle calibres

.177 / 4.5mm

Velocity
750–950 fps
Zero
25–35 yd

Most popular UK air rifle calibre. Flat trajectory to 25yd, significant drop beyond 40yd. No BC needed — Reticle Plotter uses a parabolic model.

Suggested distances
20,25,30,35,40,45,50 yd
Field target, HFT, pest control

.22 / 5.5mm

Velocity
550–750 fps
Zero
30–40 yd

Heavier pellet, more wind resistance, greater drop at range. Zero at 30–35yd to minimise holdover within typical hunting distances. Parabolic model accurate to 50yd.

Suggested distances
15,20,25,30,35,40,45,50 yd
Hunting, pest control, plinking

.25 / 6.35mm

Velocity
500–650 fps
Zero
30 yd

Less common but popular for hunting larger pests. Significant drop beyond 30yd. Parabolic model works well; enter actual chronograph velocity for best accuracy.

Suggested distances
15,20,25,30,35,40 yd
Hunting, HV PCP

Setup tips for accuracy

Measure actual velocity
Use a chronograph to measure your actual muzzle velocity rather than the advertised figure. Actual velocity varies by pellet brand and weight. A 50fps difference changes holdover at 50yd by nearly half a mil.
Weigh your pellets
Enter exact pellet weight in grains. Standard .177 pellets range from 7gr to 10.5gr; .22 from 14gr to 21gr. Heavier pellets have steeper drop curves.
Measure scope height
Scope height above bore is the distance from the centre of your scope tube to the centre of your barrel. Usually 1.5–2 inches on a standard mount. Getting this right affects near-zero accuracy significantly.
Zero at 30 yards for .177
A 30-yard zero gives a near-zero of around 12–15 yards and keeps the pellet within ±0.3 inch of aim from 10–35 yards. Ideal for HFT and general air rifle shooting.
Use the MPR-V5 reticle
The MPR-V5 mil-stadia reticle gives the most reference points for air rifle holdovers. With 20mil arm length and 0.5mil tick spacing, you get a reference point every 12–50mm of holdover depending on magnification.

Frequently asked questions

Do I need to enter a ballistic coefficient for an air rifle?

No. Reticle Plotter uses a parabolic model for air rifle use which only needs muzzle velocity and zero distance. BC is optional and most useful for centrefire rifles at 200+ yards.

What zero distance should I use for a .177 air rifle?

For field target and HFT, 30–35 yards is most common. This keeps the pellet within a tight window from 10–40 yards and gives useful holdovers for targets at 50+ yards. For pest control in a garden, 20–25 yards may be more practical.

How accurate are the holdover calculations?

Very accurate for the parabolic model within its range. At 50 yards, expected accuracy is within 0.2–0.3 mils of actual drop for a well-characterised airgun. Chronograph your rifle and weigh your pellets for best results.

Can I use it with a first focal plane scope?

Yes. First focal plane (FFP) scopes maintain mil calibration at all magnifications. Reticle Plotter works with both FFP and second focal plane (SFP) scopes — for SFP, use the app at the magnification where your reticle is calibrated (usually max power).

Can I print the reticle map?

Yes with a Pro account. Export at your chosen scope diameter in mm and up to 600 DPI. Print and laminate as a quick-reference card for field use.

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