Air Rifle Accuracy
How to Zero an Air Rifle Scope
Zeroing isn't the hard part — getting the rifle to print where you're looking takes ten minutes. The part that actually makes you a better shot is what comes after: learning the full shape of your pellet's arc so you can hit a kill zone at any range, not just one.
First, the boring-but-essential setup
Before you touch a turret, take the human error out of the equation. Get the rifle on a bipod or a bag, sat solid, with the same cheek weld and the same hold you'll use in the field. A wandering hold will send you chasing a zero that doesn't exist. If your scope has adjustable objective (AO) or side focus, set the parallax to match your zero distance — on an air rifle, parallax error at close range is brutal and will quietly ruin your groups before you've even started.
Start close, around 10 to 15 yards, just to get on paper. Fire three shots, see where they land, and make a coarse adjustment to bring them roughly under the crosshair. There's no point burning pellets at 30 yards while you're still a foot off.
Which distance should you zero at?
This is the question every forum argues about, and the honest answer is: it depends what you shoot. But for a UK sub-12 ft·lb hunting rifle, 30 yards is the most useful single zero there is, and here's why.
A pellet doesn't travel in a straight line. It leaves the muzzle below your line of sight (the scope sits an inch or two above the bore), climbs up through your point of aim, arcs over, and drops back down through it again further out. That gives you two points where the pellet is bang on the crosshair — the "two zeros." Zero at 30 yards and a typical sub-12 .177 will also be roughly on at around 12–15 yards, sitting only a few millimetres high in between. That flat middle band is your "point-blank" range: from about 12 to 33 yards you can hold dead-on and stay inside a rat's kill zone without thinking.
Zero too close (say 10 yards) and the pellet climbs alarmingly high by 30 yards. Zero too far (45 yards) and it's dropping fast everywhere in between. Thirty yards keeps the whole hunting band manageable. If you shoot HFT, you might zero differently again — many HFT shooters use a longer zero and hold under for the close targets.
Dialling it in
- Move out to your chosen zero distance and shoot a five-shot group — never adjust off a single shot, which tells you nothing about where the rifle really shoots.
- Measure from the centre of that group to your point of aim.
- Adjust the turrets: most air rifle scopes move ¼ MOA per click (about 7mm at 30 yards), so count clicks accordingly. Up/right brings the group up/right.
- Shoot another five-shot group to confirm. Repeat until the group centre sits on the aim point.
Confirm the group, not the flier. One pellet that strays is information about your barrel or your hold; it's not your zero.
This is where Pellet earns its keep. Instead of squinting at the card and measuring with a ruler, photograph each group and the app measures it in millimetres and tells you exactly how far off centre you are — windage and elevation — so you know which way to click. Every group is logged against the distance, pellet and conditions automatically.
The bit most people skip: mapping your trajectory
A zero at one distance is almost useless on its own. The shooters who connect in the field are the ones who know where their pellet lands at every range. Once you're zeroed, shoot a confirmed group at 10, 15, 20, 25, 30, 35 and 40 yards and note how high or low the pellet strikes relative to your aim at each. That table is your trajectory — your "dope."
Translate it into mil-dot holds: maybe the pellet is two dots high at 20 yards and one and a half dots low at 40. Write it on a small card, slip it under your scope cap, and you've got a field-ready ranging system. Ballistics apps like Chairgun or Strelok will predict this arc, but predictions and reality drift apart — your pellet, your barrel, your power and the day's air are what actually count.
| Range | Typical strike (30 yd zero, sub-12 .177) | Hold |
|---|---|---|
| 15 yd | ~on / a touch high | Dead on |
| 20 yd | slightly high | Dead on / tiny hold-under |
| 30 yd | zero | Dead on |
| 35 yd | slightly low | ½ mil-dot up |
| 40 yd | noticeably low | 1–1.5 mil-dot up |
Treat those as a starting shape, not gospel — yours will differ with calibre, weight and power, which is exactly why you measure it rather than copy someone else's.
Pellet builds your real trajectory from real shots. Because every target is logged with its GPS-measured distance and your measured group, the app assembles your actual point-of-impact at each range over time — a holdover card built from your own shooting, not a calculator's guess.
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When your zero seems to wander
If a solid zero suddenly drifts, work through the usual suspects before you blame the rifle: loose scope mounts (check the screws), a PCP sitting outside its consistent fill band, a new tin or lot of pellets behaving differently, or simply a colder day changing your muzzle velocity. A surprising amount of "my rifle's lost its zero" turns out to be a fresh tin of pellets — which is exactly the kind of thing worth tracking shot to shot.