Aguila Colibri 20gr Review: The Primer-Only .22 LR

Colibri sounds like the answer to every noise complaint. It is a narrow tool with one serious failure mode, and the safe response to it is worth knowing before you open the box.

What Colibri actually is

Most .22 LR cartridges are made like smaller versions of centerfire ammunition in one respect: the case holds a charge of powder, and the primer lights it. In a rimfire the priming compound sits inside the rim itself. Aguila's Colibri leans on that fact. The listing describes a 20-grain lead bullet in a standard .22 LR case, and the load is built to let the priming compound do the pushing.

That one design decision explains everything else about it: why it is so quiet, why it is so weak, and why it needs different handling than anything else in your range bag.

Why people want it

There are three honest reasons to buy this load, and they are all about volume of noise rather than power.

• Backyard practice where it is legal. In a long rifle barrel, the report is far closer to a loud air rifle than a conventional gunshot. Check local discharge ordinances first, because "quiet" and "legal" are different questions.
• Introducing a nervous shooter. Reduced noise and almost no recoil make a first session less intimidating. It is not a substitute for hearing protection.
• Short-range pest control where lawful. A light, slow bullet works at very short distances only, which is a demanding limit.

If you want quiet and reliability together, a suppressor with ordinary subsonic ammunition is a different path with its own rules; the trade-offs are laid out in suppressed .22 versus subsonic centerfire. Our quiet rimfire guide compares Colibri with the .22 Short as the two non-suppressed options.

The stuck bullet, and what to do

This is the part that makes Colibri a different product from a quiet-ish plinking load.

A bullet that leaves a barrel needs enough energy to carry it out. A bullet with very little energy may not. The longer the barrel, the more friction it faces; a dirty or fouled bore adds to it. A round that fails to exit the barrel is called a squib. Firing a second round behind a stuck bullet can bulge or burst the barrel and injure the shooter.

The safe response is the same one used for any squib, and it is simple:

1. Recognize the signs. A shot that sounds or feels much weaker than the ones before it, or one where you do not see or hear an impact.
2. Stop. Keep the muzzle pointed in a safe direction and keep your finger off the trigger.
3. Unload. Remove the magazine if there is one and open the action with the muzzle safely pointed.
4. Inspect the bore. Look through the barrel from the breech end, never the muzzle end, with the action open and the gun unloaded.
5. If something is lodged, do not shoot. Have a gunsmith or the manufacturer's service department clear it.

The longer the barrel and the more rounds fired, the more important it is to check. A sensible habit with this load is to look through the barrel after every few shots, with the action open and the gun unloaded, before the next one.

What it will and will not run in

Manual actions. Bolt-actions, lever-actions, pump guns and single-shots are the natural fit because you provide the cycling energy. Check that your gun's manual does not forbid ultra-low-power loads.

Revolvers. A revolver can also use it, but a stuck bullet in a short barrel is a different problem: a bullet that leaves the cylinder and stops in the forcing cone, or one that blocks the barrel, can jam the gun mid-session. Inspect before every cylinder.

Semi-autos. The load is generally too weak to cycle a blowback action. You can load and eject each round by hand, but that defeats the purpose of a semi-auto and makes a stuck-bullet check harder to remember. If your goal is a quiet semi-auto, choose a subsonic load that is designed to cycle, not a primer-only one. The subsonic comparison walks through those.

How it compares with a normal plated .22

A fair verdict

Colibri is a specialist's round. Its virtue is low noise at close range from a manual action, and for the shooter who needs exactly that, it does the job. Its cost is a risk that most .22 loads simply do not carry, and a requirement that you actually check the barrel instead of assuming.

If you are on the fence, ask what you want from it. If the answer is "the quietest possible backyard plinking from a bolt-action," read the listing, buy a single box, and set up a routine for bore checks. If the answer is "something quiet for my semi-auto," Colibri is the wrong answer and a subsonic load is the right one.

Shooters who want quiet and reliability should look at the retailer's subsonic ammunition category instead and match the load to their gun.

And whichever you choose, wear hearing protection. Quiet is relative, and the quiet rounds are still not a substitute for ear pro. That distinction matters more the more often you shoot.

Editorial note: This is an independent editorial overview built from manufacturer specifications and publicly available information. We have not performed hands-on testing of the products discussed, and nothing here is a performance guarantee. Verify specifications, compatibility and legality for your own situation.

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