Comparison
Suppressed .22 vs. Subsonic Centerfire for Quiet Shooting
Quiet is not one thing. A shot produces several separate noises from several separate sources, and the two approaches attack different ones — which is why the comparison usually gets argued badly.
The short version
- A suppressor only addresses muzzle blast. Action noise, the sonic crack of a supersonic bullet and the sound of impact are all separate and all survive it.
- Subsonic ammunition removes the crack, in either caliber. That is the single biggest step toward genuinely quiet shooting, and it is why subsonic .22 and subsonic centerfire are both in this conversation.
- Suppressed subsonic .22 is the quietest practical setup and by a wide margin the cheapest to run. Nothing else in common use competes on either count.
- Subsonic centerfire buys reach and capability, not quiet. It is a bigger, heavier, far more expensive way to shoot at distances and for purposes a .22 cannot serve.
Where the noise actually comes from
Most disappointment with suppressed rifles comes from expecting one device to solve four problems.
The consequence is that a genuinely quiet setup is a system rather than a purchase:
- Muzzle blast is the suppressor's job, and it is the loudest component in an unsuppressed shot.
- The sonic crack is produced by the bullet itself exceeding the speed of sound, travels along with it, and cannot be contained by anything at the muzzle. Only subsonic ammunition removes it.
- Action noise — the bolt cycling, the spring, brass hitting the ground — is entirely mechanical. On a well-suppressed subsonic setup it is frequently the loudest thing remaining, which is one of several reasons bolt actions are favoured for quiet work.
- Impact noise is decided by what you are shooting at. Steel rings audibly at distance; a dirt berm does not.
The two approaches head to head
| Suppressed .22 LR (subsonic) | Suppressed subsonic centerfire | |
|---|---|---|
| Muzzle blast | Minimal — small powder charge to begin with | Larger charge, so more work for the can even suppressed |
| Sonic crack | None with subsonic loads | None with subsonic loads |
| Action noise | Often the loudest remaining element; bolt guns are quietest | Same principle; gas-operated hosts are noisier than bolt guns |
| Suppressor size and weight | Small and light | Substantially larger and heavier |
| Cost per round | The lowest of any cartridge in common use | A large multiple of rimfire |
| Effective reach | Short; subsonics drop and drift steeply | Considerably further with the same subsonic constraint |
| Host availability | Enormous, and inexpensive | Narrower and more expensive, with tuning considerations |
| Suppressor fouling rate | The fastest in the category | Slower — jacketed bullets, no wax lubricant |
Read down that table and the split is clear. On the quiet dimension, .22 wins on muzzle blast and ties on the crack, so a suppressed subsonic .22 in a bolt action is about as quiet as practical shooting gets. On the capability dimension it loses everywhere — reach, energy on target and what the cartridge is suited to are all substantially greater in centerfire.
Which means the honest framing is not "which is quieter" but "do you need what centerfire does?" If the answer is no, everything about the rimfire route is easier and cheaper.
Running cost, honestly
This is where the comparison stops being close.
.22 LR is the cheapest cartridge in common use by a wide margin, and subsonic .22 is inexpensive relative to almost everything else even at a premium over bulk. Subsonic centerfire ammunition is specialty ammunition: lower volume, often heavier projectiles, frequently sold in fifty-round boxes at prices that put a serious ceiling on how much practice anyone does with it.
The knock-on effect matters more than the arithmetic. A setup you shoot a thousand rounds through a year teaches you far more than one you shoot fifty rounds through. For anyone whose interest in suppressed shooting is skill and enjoyment rather than a specific capability requirement, the rimfire route delivers more shooting per unit of money by a factor that is not close.
Hardware costs run the same direction. Rimfire cans are smaller, lighter and generally less expensive; rimfire hosts are cheap and abundant. A centerfire subsonic setup means a larger suppressor, a more expensive host, and frequently gas system or buffer tuning to make the rifle cycle reliably with reduced-power ammunition.
Hosts, cans and cycling
Two practical issues that catch people out on both sides.
Cycling with reduced-power ammunition. Semi-automatic actions need a minimum amount of energy to work, and subsonic loads sit close to that threshold by definition. In rimfire, a blowback semi-auto frequently will not cycle subsonics at all, which is why bolt actions dominate quiet rimfire shooting. In centerfire, hosts intended for subsonic use are usually adjustable in some way — an adjustable gas system, a different buffer or spring — and getting that tuning right is part of the project rather than an afterthought.
Stabilisation of heavy subsonic projectiles. Subsonic ammunition tends toward heavier and therefore longer bullets, and the required spin depends on bullet length while the actual spin depends on velocity as well as twist. Both effects push the same way. In rimfire this shows up as some rifles shooting heavy subsonics noticeably worse than standard loads. In centerfire it is why subsonic-oriented cartridges specify faster twists than their supersonic siblings.
A bullet that is already yawing has a larger effective path through a suppressor, which raises the risk of a baffle strike. Test any subsonic load on paper first: round holes mean it is flying straight; elongated or sideways holes mean it is not, and that load should not go through your suppressor. Separately, treat any shot that sounds noticeably weaker than the rest as a possible squib — stop and confirm the bore is clear before firing again.
Maintenance load
The one dimension where centerfire is clearly easier.
A rimfire suppressor fouls faster than anything else on the market, because .22 bullets are bare or plated lead carrying a wax lubricant, rimfire powder is not always fully consumed, and people shoot .22 in volume. The deposits are physically substantial, and a neglected rimfire can eventually seizes into a single mass. That is why user-serviceable rimfire designs are strongly preferred and why weighing the can periodically is the standard way to track it.
Centerfire suppressors firing jacketed bullets accumulate carbon rather than lead and wax, at a far lower rate, and many are sealed precisely because they do not need routine owner disassembly. The trade is that when a centerfire can does need service, you are usually returning it to the manufacturer.
Polymer-coated ammunition materially reduces the rimfire problem by replacing the wax that binds the deposits together, and for a suppressed .22 it is the single most effective change available.
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Which one you actually want
Choose suppressed subsonic .22 if: you want the quietest practical setup, you shoot at short range, you want to shoot a lot without thinking about ammunition cost, you value a light and compact package, or you are buying your first suppressor and want to learn what suppressed shooting is actually like before committing to something larger.
Choose subsonic centerfire if: you need meaningful capability at distances rimfire cannot serve, you are working within specific requirements that a rimfire cartridge does not meet, or you already own a suitable host and the incremental cost is only the can and the ammunition.
For most people asking the question, the answer is the rimfire. It is quieter, it is dramatically cheaper to run, the hardware is smaller and lighter, and it is the setup you will actually shoot rather than the one you will admire. The centerfire route is not a better version of it — it is a different tool that happens to also be quiet.
Suppressor ownership in the United States is federally regulated and separately regulated — in some cases prohibited — at state level. Whether you may possess one, transport it across state lines, lend it to another person, or use it for hunting are all governed by rules that vary by jurisdiction and change over time. Legal restrictions on which cartridges may be used for particular game are separate again and set by state wildlife agencies. Verify current federal and state requirements before acting, and consult a qualified attorney for anything consequential. Nothing here is legal advice.
Frequently asked questions
Is a suppressed .22 quieter than a suppressed .300 Blackout?
With subsonic ammunition in both, yes — the rimfire produces less muzzle blast because the powder charge is far smaller, and neither produces a sonic crack. The centerfire is not trying to win that comparison; it exists to deliver capability at distances a rimfire cannot serve. If quiet is the only criterion, suppressed subsonic .22 in a bolt action is the answer.
Why is my suppressed rifle still loud?
Probably because you have addressed only one of four noise sources. A suppressor reduces muzzle blast; it cannot touch the sonic crack of a supersonic bullet, the mechanical noise of the action cycling, or the sound of the bullet hitting the target. Switch to subsonic ammunition to remove the crack, consider a bolt action to reduce action noise, and shoot into a berm rather than steel if impact noise is the issue.
Will subsonic ammunition cycle my semi-auto?
Often not, in rimfire — blowback actions need a minimum amount of energy and subsonics frequently fall below it, producing failures to eject or feed. In centerfire, hosts intended for subsonic use are usually adjustable in some way and require tuning to work reliably. If you want quiet without fighting the rifle, a bolt action removes the problem entirely.
Which suppressor fouls faster?
The rimfire, by a large margin. .22 bullets are bare or plated lead carrying a wax lubricant, rimfire powder is not always fully consumed, and people shoot .22 in far greater volume. The deposits are substantial rather than a film, and a neglected can can seize. Buy a user-serviceable design, weigh it periodically to track build-up, and consider polymer-coated ammunition, which removes the wax that binds the deposits together.
Do I need a faster twist barrel for subsonic ammunition?
It depends on the cartridge. Subsonic loads tend toward heavier and therefore longer bullets, and lower velocity means less spin from the same twist — both push toward marginal stabilisation. In .22 LR the standard twist handles most subsonics but heavy ones are the closest to the edge, and results are rifle-specific. Test on paper: round holes mean it is flying straight, elongated holes mean it is not.
Which is the better first suppressor?
A rimfire can, for most people. It is smaller, lighter and less expensive, the hosts are cheap and abundant, and the ammunition cost lets you actually shoot it enough to learn what suppressed shooting is like. The trade-off is that it needs cleaning far more often than a centerfire can — which is itself a useful thing to learn early rather than on something more expensive.