Best Air Rifle Calibre for Rabbits in 2026: .22 Wins

Rabbiting in Ireland almost always comes down to one choice before you even pick up the rifle: .177, .22 or .25. The .22 calibre is the best air rifle calibre for rabbits for most Irish hunters in 2026 — it balances knockdown power and trajectory better than the other two at the ranges rabbits are actually shot. .177 wins on flat, open pasture where sightlines run past 35 metres. .25 earns its place only when shots stay inside 25 metres and you want maximum shock on impact.

Why this matters

Get the calibre wrong and you either wound rabbits at range or waste money on pellets that overkill at short distance. In Ireland, any air rifle producing more than 1 Joule of muzzle energy is classed as a firearm and needs a Firearms Certificate, which means the FAC-rated PCP air rifle you buy has real stopping power behind it — the calibre decision has consequences beyond the tin of pellets.

A PCP air rifle in .22 is the default recommendation from most Irish hunting counsel for exactly this reason: it clears the humane-kill energy threshold at typical rabiting distances without the trajectory penalty .25 carries past 25 metres. 2026 pellet pricing and availability have not changed that math.

What makes the best air rifle calibre for rabbiting

• Terminal energy at range — how much force the pellet still carries at 25-35 metres, not just at the muzzle.
• Trajectory flatness — how much hold-over you need to compensate for drop between 20 and 40 metres.
• Pellet availability in Ireland — .177 and .22 tins sit on more shelves than .25, and that matters mid-season.
• Wind resistance — heavier pellets drift less across open Irish pasture on a blustery evening.
• Legal classification — every rifle capable of humane rabbit kills in Ireland needs an FAC regardless of calibre.
• Shot placement consistency — a calibre that group tightly at your actual hunting range beats one with a bigger number on the tin.

At a glance: air rifle calibres for rabbiting

1. .22 calibre: best air rifle calibre for rabbiting overall

The .22 (5.5mm) pellet sits in the middle of the three and that's precisely why it works for most Irish rabiting. It carries enough weight to retain usable energy out to 35 metres while staying manageable enough on drop that a hunter who knows their zero doesn't need a rangefinder for every shot.

.22 calibre pros:

• Retains humane-kill energy at typical Irish rabiting distances of 25-35 metres
• Pellet tins are widely stocked, so you're not hunting for stock mid-season
• Forgiving on wind drift compared to .177 on open pasture
• Works across springer, gas-ram and PCP platforms without major trade-offs

.22 calibre cons:

• More hold-over than .177 once you push past 40 metres
• Slightly heavier recoil impulse on break-barrel springers than .177

Best for: hunters who take a mix of hedge-edge and open-pasture shots inside 35 metres. Verdict: Buy.

2. .177 calibre: best for open ground and long sightlines

.177 (4.5mm) is the flattest-shooting of the three, which is why target and field shooters gravitate to it when the terrain gives them clean, unobstructed shots past 35 metres. The lighter pellet also runs at higher velocity out of the same platform.

.177 calibre pros:

• Flattest trajectory of the three main calibres, easiest to judge hold-over at range
• Higher velocity translates to less lead required on moving targets
• Cheapest pellets to buy in bulk across most Irish retailers

.177 calibre cons:

• Sheds energy fastest of the three past 30-35 metres, risking wounding rather than a clean kill
• More affected by crosswind on open pasture than heavier .22 or .25 pellets

Best for: shooters working flat, open fields with consistent 35m+ sightlines and minimal wind. Verdict: Buy — but only if your ground suits it.

3. .25 calibre: best for close-range stopping power

.25 (6.35mm) is the heaviest pellet of the three and hits with noticeably more shock at close range, which is why some Irish hunters run it for hedge-line and warren-edge shots under 25 metres where trajectory doesn't have room to matter.

.25 calibre pros:

• Delivers the most energy transfer on impact inside 25 metres
• Less prone to pass-through on smaller game, meaning more energy stays in the target
• Solid choice for dusk shots where distance judgment is harder

.25 calibre cons:

• Drops fast past 25-30 metres, making longer shots risky without precise range-finding
• Pellet choice is thinner across Irish retailers than .177 or .22
• Heavier pellet means lower magazine capacity on most PCP platforms

Best for: close-cover rabiting where shots rarely exceed 25 metres. Verdict: Hold — only if your ground is consistently short-range.

Pellets for .22 rabiting rifles

Air Arms | Diablo Field Plus Heavy Pellets | .22 | 500

Calibre .22, 5.52mm head size, 500-count tin, 18.0 grain weight.

€24

Diabolo Field Air Pellets .22cal 16gr 500pcs

€22.30

How we ranked these calibres

The ranking above weighs terminal energy at real rabiting distances first, trajectory second, and pellet availability in Ireland third — legal classification applies equally to all three since any air rifle capable of humane rabbit kills clears the 1 Joule FAC threshold regardless of calibre. Field conditions matter as much as ballistics: rabbit warrens in Ireland typically sit in banks fringed by rushes, briar and long grass along ditch lines, and shot placement inside 30-35 metres matters more than the number stamped on the tin. Clearing long grass and cover along your approach lane reduces the risk of a stem catching a pellet mid-flight and throwing your point of impact off, which matters more for the lighter .177 pellet than the heavier .25.

If your pellet can't carry 11 ft-lbs of energy to 30 metres, the calibre marked on the tin doesn't matter.

Ground conditions, not the calibre badge, decide which of the three actually performs on a given evening. A hunter working the same firearms licence in Ireland across multiple platforms often ends up owning both a .22 and a .177 for exactly this reason.

Which air rifle calibre should you choose?

Default to .22 if you're buying one rifle for general rabiting — it clears the humane-kill threshold across the widest range band and pellets are never hard to find in 2026. Add .177 as a second rifle only once you've confirmed your ground gives you long, open sightlines past 35 metres. Reserve .25 for close-cover specialists who consistently shoot inside 25 metres and don't mind a thinner pellet selection.

Anyone weighing up their first rifle purchase against air rifles for pest control in Ireland should treat calibre as the second decision, not the first — platform, FAC status and intended range come before .177 vs .22 vs .25.

FAQ

One last thing

Most Irish rabiting misses in 2026 still trace back to range misjudgment, not calibre choice — a .22 pellet placed correctly at 30 metres beats a .177 pellet placed poorly at 40. Pattern your zero at your actual hunting distance before the season starts, not at the range's fixed 25-metre bench.

Related guides

• Ferreting equipment for rabiting
• Rimfire rifles for pest control and vermin