Optics · How-To
How to zero an air rifle scope (and what distance to use)
Researched by James · Updated September 26, 2026 · Editorial policy
On this page
- What distance should you zero an air rifle scope at?
- How do you actually zero a scope, step by step?
- Do you need to set parallax before you zero?
- How do you zero a scope on a break-barrel or springer?
- Why won't my air rifle scope hold zero?
- Should you zero with pellets or slugs, and does zero change?
- FFP, SFP, and zero: does it matter which scope you use?
- FAQ
- Sources
Zero distances, click values, and scope specs below come from manufacturer pages and independent optics guides, cited at the bottom of this page. Full methodology & editorial policy →
A scope that's "off" is usually a zero problem, not a rifle problem. This walks through the process the way I set up every scope before it goes hunting, plus the caliber-by-caliber starting distances and the fixes for a scope that won't hold.
What distance should you zero an air rifle scope at?
It depends on caliber and what you're hunting. A single 25-30 yard zero on a hunting PCP keeps most shots from about 15 to 40 yards within roughly an inch of point of aim, which is why it's the most common airgun hunting zero. Faster, flatter .177 pellets can zero a bit closer at 20-25 yards; heavier .25 pellets and slugs benefit from a longer 30-40 yard zero that flattens their curve.
| Caliber / load | Typical zero | Why |
|---|---|---|
| .177 pellet | 20-25 yd | Fast, flat trajectory over short range; matches typical plinking and pest distances |
| .22 pellet or light slug | 25-35 yd | The standard all-around airgun hunting zero for rabbits, doves, and squirrels |
| .25 pellet | 30-35 yd | Heavier pellet arcs more; a longer zero flattens the curve at hunting range |
| .22/.25/.30 slugs (PCP) | 35-40 yd | Slugs usually run faster and heavier than pellets from the same rifle, letting you push zero out before you need holdover |
Treat this table as a starting point, not gospel. Your rifle's actual velocity, published on a chronograph string like the ones in the FPE chart, decides where your specific pellet or slug actually crosses the line of sight. For everything past your zero distance, build a real holdover chart instead of guessing; see air rifle holdover with mil-dots and MOA.
How do you actually zero a scope, step by step?
- Mount and level the scope first. A canted reticle will make windage drift as you dial elevation. See how to mount and level a scope if you haven't done this yet.
- Set parallax to your zero distance. On an AO or side-focus scope, dial the parallax ring until the target is sharp at your chosen distance; see what every scope knob does for the full rundown.
- Bench the rifle on a rest so the only variable is the scope, not your hold.
- Shoot a 3-shot group at your zero distance with the load you'll actually hunt with.
- Measure the offset from the group's center to your point of aim, in inches.
- Dial the turrets. Move elevation and windage roughly halfway to point of aim, since a scope's stated click value can be slightly off from true, and shoot again.
- Repeat until the group centers on the bullseye, then shoot one more confirming group without touching the turrets.
Do you need to set parallax before you zero?
Yes, and this is the step people skip. Parallax error means the reticle appears to move against the target when your eye shifts off the scope's optical center, even though the rifle hasn't moved. If parallax is set for 50 yards but you're zeroing at 25, your head position on the stock can shift point of impact by an inch or more, shot to shot, making a correctly-zeroed scope look inconsistent. Set parallax to your real shooting distance first, then zero.
How do you zero a scope on a break-barrel or springer?
The mechanics are the same, but springers add two problems: recoil in both directions (forward on firing, backward on the piston's return) and the artillery hold, where grip pressure changes point of impact. Use a scope rated for spring-piston recoil, rest the rifle on an open palm rather than a bag under the forend, and keep your hold identical between zeroing and hunting, since a tighter or looser grip will move the group even with a perfect zero.
Why won't my air rifle scope hold zero?
Check these first
- Ring and base screw torque (see our mounting guide for numbers)
- One consistent pellet or slug, not a mixed tin
- Fill pressure on a PCP, or spring wear on a springer
- A scope rated for your platform's recoil direction
Likely a scope problem if
- Groups "walk" in one direction shot after shot with mounts torqued and one load
- Turrets feel mushy or don't produce a repeatable click
- You're near either end of the adjustment range and still not centered
If the rifle itself is inconsistent rather than the scope, that's a different diagnosis; our PCP inconsistent velocity guide covers regulator and fill-pressure causes.
Should you zero with pellets or slugs, and does zero change?
Zero with whatever you'll actually hunt with. Slugs and diabolo pellets, even at similar weights, don't fly identically because their drag and stabilization differ, so a scope zeroed for pellets can print a slug an inch or more off at 30-40 yards. If you run both in the same rifle, as I do with 40.1gr ACE FRAG slugs in my M4 slug setup, treat each as its own load with its own zero, and re-confirm any time you switch.
FFP, SFP, and zero: does it matter which scope you use?
No, focal plane doesn't change how you zero, only how the reticle's holdover marks behave as you change magnification. If you're choosing between the two for a new scope purchase, see first focal plane vs second focal plane; the zeroing steps above apply either way.
FAQ
What distance should you zero an air rifle scope at?
For most .22 hunting PCPs, 25-35 yards is the standard all-around zero: it keeps trajectory within about an inch of point of aim from roughly 15 to 40 yards, so you rarely need to hold over for typical small-game shots. .177 shooters often zero at 20-25 yards since the pellet is faster and flatter over short range, while .25 pellets and slugs commonly move the zero out to 30-40 yards to flatten a heavier, longer trajectory.
How do you zero a scope on a pellet gun?
Set parallax or AO to your zero distance, shoot a 3-shot group from a rest, then dial the turrets to move the group's center onto your point of aim. Move roughly half the remaining distance, re-shoot, and repeat until the group centers on the bullseye, then confirm with one more group before you call it done.
Can I zero at 10 yards indoors and expect it to hold at 30?
No. A 10-yard zero and a 30-yard zero sit on different points of the same trajectory curve, so a pellet zeroed at 10 yards will typically print low at 30 yards. Use a close indoor zero only for bore-sighting or practice, then re-zero outdoors at your real hunting distance.
Does the parallax setting affect zero?
Yes. If parallax (AO or side focus) is set for a different distance than you're actually shooting, the reticle can appear to shift against the target as your eye moves off-center, which throws off point of impact. Set parallax to your real shooting distance before you fine-tune zero, not only at the end.
Why won't my air rifle scope hold zero?
The most common causes are loose ring or base screws, a mixed batch of pellets or slugs, spring-piston recoil hitting a scope that isn't rated for it, and a scope that has run out of internal adjustment. Check ring torque first, confirm you're shooting one consistent load, and see our troubleshooting checklist if the problem persists.
How many clicks equal an inch at your zero distance?
Most airgun scopes adjust in 1/4 MOA per click, and 1 MOA is close to 1 inch at 100 yards, so at 30 yards a 1/4-MOA click moves point of impact about 0.075 inch, and it takes roughly 13 clicks to move an inch. Some scopes use MRAD clicks instead, where 1 mil equals about 3.6 inches at 100 yards, so check your turret caps before you start dialing.
Do slugs and pellets need separate zeros on the same rifle?
Usually yes. Slugs and diabolo pellets fly differently even at similar nominal weights, so switching between them after zeroing can shift point of impact by an inch or more at hunting distances. Zero for whichever projectile you'll hunt with, and re-check before you switch.
How often should you re-check a hunting zero?
Check zero before every hunt and after any drop, bump, scope removal, or rough transport. A PCP's fill pressure and a springer's mount screws can both drift enough over a few weeks of use to move point of impact, and a 3-shot confirmation at your zero distance takes about two minutes.
What's the difference between zeroing and boresighting?
Boresighting gets the reticle roughly aligned with the bore before you fire a shot, using a boresighter or by eye down the barrel, and it exists to save pellets on the first group. Zeroing is the live-fire process after that: shooting actual groups and dialing turrets until point of impact matches point of aim at your chosen distance.