Here is a repair bill nobody wants to pay: a scorched piston seal, a battered mainspring and a scope knocked clean off zero. All three can come from a single squirt of the wrong oil down the barrel. We see it most months at our Kent workshop, and the owner is almost never careless. Nobody had ever told them the rules.
You want your air rifle to shoot straight, hold its value and last for years. Good air rifle maintenance is how you get there, and the reassuring part is how little it takes. A few minutes of care, the right lubricant and sensible storage do most of the heavy lifting.
We have sold and serviced airguns from our Rochester base on the Medway City Estate since 2006. This guide shares what our in-house workshop actually tells customers. It covers cleaning, lubrication, dieseling, pellet choice, calibre, storage, the UK law and the point where a job is better handed over.
In this guide:
- Match your care to the type of rifle
- A cleaning routine that actually helps
- Lubrication and dieseling: the costly mistake
- Pellet types explained
- .177 or .22: choosing a calibre
- Choosing and storing pellets
- The law: the sub-12 ft/lb limit
- When to stop and book a service
Match your care to the type of rifle
Before you touch anything, it pays to know what you are working with. The three main powerplants each want slightly different care, and getting this wrong is how rifles end up on our bench.
- Spring-piston (springers and gas-ram): a coiled spring or a gas strut drives a piston that violently compresses air behind the pellet. These are the most sensitive to the wrong lubricant, and the golden rule further down applies to them above all.
- PCP (pre-charged pneumatic): fed from a filled air reservoir. Keep the fill probe and port spotless and free of grit, never run the cylinder completely empty, and have the seals checked from time to time.
- CO2 and gas: powered by a capsule or cylinder. These want the occasional drop of the correct seal oil to keep the O-rings supple, and CO2 should not be left under pressure in the gun for long stretches.
Whatever you own, the external routine is much the same. If you are still weighing up a rifle, our air rifle buyer’s guide for 2026 compares the powerplants in plain English, and you can see the current range at our air rifle shop in Kent.
A cleaning routine that actually helps
You do not need to strip an air rifle to keep it healthy. A short routine after every few outings covers almost everything that matters. The mistake most owners make is scrubbing the wrong parts and neglecting the right ones.
The barrel
Air rifle barrels rarely need aggressive cleaning, and over-cleaning does more harm than good. A pull-through with a cloth patch is all most guns want, and only when accuracy starts to drop or lead fouling builds up.
Turn the rifle so any fluid runs away from the action, not into it. Feed the weighted cord in from the breech end where you can, then draw a lightly dampened patch through. Keep the cord central so it never drags across the crown, the last few millimetres of rifling at the muzzle. A damaged crown wrecks accuracy for good.
Repeat with fresh patches until they come through clean. Follow with a dry patch or two, then a single barely-oiled patch and a final dry one, so the bore is left clean rather than wet. Never spray cleaning fluid straight down the barrel.
The action and metalwork
Wipe down every metal surface with a lightly oiled cloth after use, especially if you have been out in the wet. This one habit matters more than anything you do to the bore. In a damp UK climate, surface rust is the main enemy of any airgun.
Pay attention to the barrel, the cylinder or reservoir, the trigger guard and any bare metal at the muzzle. A silicone or gun-oil impregnated cloth is ideal for the job. Check the stock screws are snug too, because a loose action sitting in the stock is a common and easily missed cause of wandering groups.
Storage between outings
Store the rifle somewhere dry and out of temperature extremes, ideally horizontal or muzzle-down so residual oil cannot creep into the wrong places. A slip or hard case protects it, but never leave a gun stored damp inside a sealed case. Trapped moisture is exactly how rust starts.
Keep it out of sight and out of reach of children. That is both sensible practice and a legal expectation for every airgun owner in the UK.
Lubrication and dieseling: the costly mistake
This is where more air rifles are ruined than anywhere else, so read it twice. Never drop petroleum-based oil, such as 3-in-1, motor oil or ordinary gun oil, into the compression chamber or transfer port of a spring-piston or gas-ram rifle.
When the piston slams forward it compresses the air so hard that ordinary oil ignites. That effect is called dieseling, or detonation. A faint diesel on a brand-new springer as it beds in is normal. Deliberately oiling the chamber, though, causes repeated detonations that burn the piston seal, hammer the spring and batter the scope and mounts. It also throws velocity all over the place, so the rifle stops shooting consistently.
Dan, who plinks and skirmishes near Maidstone, brought in a springer that cracked like a rimfire and puffed smoke on every shot. He had read online that a drop of 3-in-1 down the barrel would “free things up”. It freed nothing. The oil had been detonating in the chamber for weeks, and by the time it reached us the piston seal was scorched and velocity was swinging by 40 fps shot to shot. A reseal and the correct silicone lube brought it back, but a £6 tube of the right oil would have saved the whole bill.
The correct approach for a spring gun is restraint. Modern springers need very little chamber lube, and when they do it should be a proper silicone chamber oil, a few drops at a time, never petroleum oil. Internal work, such as moly on the piston sides or a spring re-lube, is a strip-down job best left to someone who has done it before.
Externally, use a light gun oil on a cloth for the metalwork, and the correct seal oil for CO2 and PCP O-rings. If in doubt, use less, or none, and ask. It is far cheaper to ask than to replace a burnt seal and a tired spring.
Pellet types explained
Pellet choice affects accuracy as much as anything you do to the gun. The four common head shapes each have a job, and knowing which is which saves a lot of guesswork at the range.
- Wadcutter (flat head): cuts clean, easy-to-score holes in paper. Excellent for close-range target work and plinking, typically around 10 metres, but it sheds velocity quickly so it is not a range pellet.
- Domed (round nose): the best all-rounder. Aerodynamic and stable, accurate across practical ranges, and the default choice for most shooters and for hunting at sensible distances.
- Pointed: designed to cut through the air for a little more reach. Quality varies, though, and a good domed pellet is often more consistent downrange.
- Hollowpoint: made to expand on impact and dump energy into the target rather than pass through. Favoured for close-range hunting where it is legal and appropriate.
| Head shape | Best use | Typical range |
|---|---|---|
| Wadcutter (flat) | Paper targets, close plinking | Short (around 10 metres) |
| Domed (round) | All-round shooting, hunting | Short to medium-long |
| Pointed | A little extra reach | Medium |
| Hollowpoint | Close-range hunting, energy transfer | Short |
The single most important point about pellets is this: your rifle will prefer some over others. Two tins of the same weight from different makers can group very differently in the same gun.
Sarah shoots paper at a club near Rochester and could not work out why her groups had opened up. Her rifle was fine. The culprit was her pellets, because she had switched to whatever was cheapest that week. We set her up with three tins of different domed pellets and sent her to a rest at 25 metres. One tin grouped noticeably tighter than the rest, and it was not the dearest. She bought a batch of that pellet and her scores climbed again within a fortnight.
The lesson is to test rather than guess. Buy a few types, shoot them off a rest at your normal range, and keep the one that prints the tightest groups. Browse our full range of shooting and airgun supplies to put a few tins side by side.
.177 or .22: choosing a calibre
The two dominant UK calibres suit different jobs, and neither is simply better than the other. Getting the choice right depends entirely on what you plan to shoot.
.177 pellets are lighter and faster, giving a flatter trajectory that forgives a slight misjudged range. That makes .177 the usual pick for target shooting, competition and field target, and it is perfectly capable for pest control in the right hands.
.22 pellets are heavier and slower with a more curved trajectory, but they carry more energy and transfer it well on impact. Many hunters prefer that for a clean, humane result at typical airgun ranges.
| Feature | .177 (4.5mm) | .22 (5.5mm) |
|---|---|---|
| Pellet weight | Lighter | Heavier |
| Velocity | Faster | Slower |
| Trajectory | Flatter, forgiving of range | More curved, needs range judgement |
| Energy on impact | Lower, cuts through | Higher, transfers energy |
| Best suited to | Target, competition, field target | Pest control, hunting |
In short, pick .177 if you value a flat trajectory and easy aiming, and .22 if you want more knock-down for quarry. Plenty of shooters keep one of each once the hobby takes hold.
Choosing and storing pellets
Pellets are soft lead and deform easily, and a damaged skirt or head will never fly true. Looking after them is one of the cheapest ways to protect your accuracy.
- Keep tins closed: this keeps dirt out and stops pellets rattling loose and denting each other.
- Store somewhere dry: lead oxidises, and a white bloom on older pellets is worth wiping off before use.
- Handle by the skirt: avoid squashing the head, and never tip loose pellets into a pocket full of keys or coins.
- Bin the damaged ones: discard any pellet that is visibly dented rather than shooting a guaranteed flyer.
- Buy in batches: once you find a pellet your rifle likes, buy enough of the same batch to last, because batches can vary.
A pellet pouch keeps a day’s supply tidy without tipping the whole tin about. It is a small habit that pays off in steadier groups over a full session.
The law: the sub-12 ft/lb limit
Maintenance and the law overlap more than people expect, because a service can change a rifle’s power. It is worth knowing exactly where the limits sit.
In England and Wales, an air rifle producing under 12 ft/lb of muzzle energy, and an air pistol under 6 ft/lb, can be owned without a firearms certificate (FAC) by a person of the right age. Above those limits the gun becomes a Section 1 firearm under the Firearms Act 1968 and needs an FAC.
This is where servicing comes in. Worn seals, unwise internal tinkering or the wrong spring can nudge a rifle’s power up, which is one reason to have that work done properly. It is an offence to sell or transfer an air weapon in a way that breaches the rules, and reputable bodies such as the British Association for Shooting and Conservation (BASC) publish clear guidance on staying within the law.
Scotland is different. It runs a separate air weapon licensing scheme under the Air Weapons and Licensing (Scotland) Act 2015, so if you are north of the border the position is not the same. Wherever you shoot, if you are ever unsure whether your rifle is within the limit, have it chronographed rather than guessing.
When to stop and book a service
Home maintenance ends at the point where you would have to open the powerplant. Anything involving the mainspring, piston, chamber seal, PCP valve or a suspected power change is a workshop job, not a kitchen-table one.
| Do it at home | Leave it to the workshop |
|---|---|
| Pull-through barrel clean | Mainspring or piston replacement |
| Wiping down external metal | Chamber seal replacement after dieseling |
| Tightening stock screws | PCP or CO2 reseal and valve work |
| A few drops of the correct external oil | Anything that changes muzzle energy |
| Storing and choosing pellets | Diagnosing a power or velocity loss |
Signs it is time to book in include a sudden drop in accuracy that pellet changes will not fix, a loss of power or velocity, heavy or repeated dieseling, a leak on a PCP or CO2 gun, a gritty or creeping trigger, or air escaping when the rifle is charged.
Mark stored his PCP in an unheated garage over one wet winter, zipped inside a slip still damp from the last outing. Come spring the barrel had freckled with rust and the fill probe was gritty. It was all avoidable. A wipe with an oily cloth and a dry cupboard indoors would have cost him nothing. We cleaned and reproofed the metal, but a rifle that lives somewhere warm and dry rarely needs that visit.
Our in-house team has been servicing airguns since 2006, and a proper strip, clean, lube and reseal often brings a tired rifle back to life. You can book that through our air rifle repair and servicing page. While a rifle is in with us, it is a sensible moment to have the scope and mounts checked, and to browse rifle scopes if yours has seen better days.
Frequently asked questions
How often should I clean my air rifle barrel?
Far less often than most people think. Air rifle barrels do not need cleaning every session, and over-cleaning does more harm than good. Pull a patch through only when accuracy starts to fall off or you can see lead fouling. Wiping the outside down after every use matters far more than scrubbing the bore.
Can I use 3-in-1 or WD-40 on my air rifle?
On external metalwork a light general oil is fine to keep rust off, though a purpose-made gun oil or silicone cloth is better. What you must never do is put petroleum oil like 3-in-1 into the compression chamber or transfer port of a springer or gas-ram, because it will diesel and damage the gun. Chambers want proper silicone chamber oil, and very little of it.
What causes an air rifle to diesel?
Dieseling is the tiny explosion that happens when lubricant ignites under the heat of compression in a spring-piston gun. A faint diesel on a brand-new springer during break-in is normal. Persistent loud cracks, smoke and a smell of burning usually mean too much oil, or the wrong oil, has reached the chamber. Left unchecked, it shortens the life of the seal and spring.
Is .177 or .22 better for a beginner?
Many newcomers get on well with .177, because its flatter trajectory is more forgiving if you misjudge the range, and it suits target practice and general plinking. If your main interest is pest control and clean kills on quarry, .22 has the edge for energy transfer. Neither choice is wrong, so pick the one that matches what you plan to shoot.
Do I need a licence for an air rifle in the UK?
In England and Wales you do not need a firearms certificate for an air rifle under 12 ft/lb or an air pistol under 6 ft/lb, provided you meet the age rules. Above those energy limits an FAC is required. Scotland has its own air weapon licensing scheme, so the rules there differ. If you are unsure of your rifle’s output, get it chronographed.
How should I store pellets so they last?
Keep them in their closed tin, somewhere dry and away from temperature swings, so the soft lead does not oxidise or get knocked out of shape. Do not tip loose pellets into a pocket where they can dent against keys or coins. Handle them carefully, bin any that are visibly damaged, and when you find a pellet your rifle shoots well, buy enough of the same batch to keep your groups consistent.
Rifle not shooting like it should? Our workshop on the Medway City Estate in Rochester has serviced airguns since 2006, from a quick reseal to a full strip and rebuild. Book an air rifle service and we will get it back on song.
