I am trying to decide which of the above is first of all the least noisy round and which is the most effective as far a knock down power. Right now I am leaning towards the .22 CB Long rounds, but I have not tried the 22 Sub-Sonic or the .22 short rounds.

For the combination you are looking for you may want to consider Aguila SSS 60gr.

I use CCI Standard Velocity for suppressed shooting. Never get a supersonic crack when used in a rifle.

What do you hope to knock-down with a .22?

I like the .22 Colibris. I shoot them inside from my revolvers. But as for knock-down power? I shot a mouse in a trap (in the garage)from about 4ft with a .22 Colibri outta my 4in Mod.63. The bullet actually bounced back off the mouse and hit me in the leg , bounced off my pant leg and landed in front of my feet.

I shoot Remington CB Longs outta my single shot Savage Falling Block for pests now.

Remington Sub-Sonic HPs

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"IN GOD WE TRUST"

i use some sellier& bellot flobert rounds they are just little "acorns" surprisingly quiet from a rifle but from a revolver they are still too loud for urban pest control.
shooting at a 2x4 in the yard, the bullet striking the board was louder than the report . might be because i was behind the rifle, but quiet none the less.

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the rules? there are no rules

how quiet are these colibris rounds in a revolver? would the neighbours hear the shot? assuming it was fired on a typical 1/4 acre lot.
well i guess if it cant penetrate a mouse, it wont help my magpie situation, but it would be fun to shoot in the house once in a while

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the rules? there are no rules

Good luck finding anything thats quiet in a revolver.

Get urself a good bolt gun or a pump and then u'll have it made.

I tried the cb short in a old win. pump and semi auto and they did not have the accuracy that the cb long gave me, plus the cb long was a lot easier to load.

The 40gr sub-sonic HP works a lot better on larger pest than the 29gr solid with as good or better accuracy but also carries a little more noise when fired.
I usually buy more cb longs due to the lower price than the sub-sonic loads from cci,in my area stores.
Plenty good for 25 yard work but they are not tac drivers at 50 yards in my guns, both with 4x scopes.

Colibri Super from Aguilla. The Supers are a couple hundred FPS faster than the standard Colibri



I buy them a case at a time for use with new students that are afraid of firearms.

These are 20 grain projectiles loaded with no powder.

Over 500FPS with zero recoil from a Model 17. More like 600FPS from a Henry Lever action

Not sure what you are trying to knock down, but these have rid my an my brothers homes of Possum and Racoons.

I shoot cb's in the closed two car garage. I have a two by four 1/8 inch sheet of aluminum. Made a bar to hold a thick phone book. I place a sticky note on the book for a target. Shoot from about ten feet with a model 34 snub. the sheet is leaned at a slight angle against my roll around tool box. No negatives to report.

They can be fired in the garage without your wife hearing them in the baby's room over the garage.

Neighbors will hear a child's cap gun at the most

I like the CB's in short or long. I believe the MV is the same for both. I don't know how quiet the others are, but with my old Remington Model 41 Targetmaster, all I can hear is the firing pin strike as if the gun were empty.

There really is not much knock down power though. Probably just a little more than a Benjamin .22 cal pump air rifle. It will knock a squirrel out of a tree, but not anything bigger. JMHO, I really haven't shot anything live with them. Might take a possum up close.

The .22 short is a little more powerful and a little louder.

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I have nothing to add to this forum....
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I use 22 shorts, but that is because my pistol slide is marked 22 Corto.

I have shot the Colibri ammo and I do not like it. I have also shot the CCI CB Shorts and CCI CB Longs and while they are good they only shoot a 29gr bullet. The new CCI Quiet-22 ammo is almost as quiet and the CB ammo but shoots a 40gr bullet instead. None of the CCI ammo requires the use of hearing protection, they are all that quiet and all are accurate too.

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For short range dispatch of vermin I use CCI 22 Short CB caps.

Here is a target that I shot a few years back with the old Winchester pump rifle. Range was 25 yards, no wind and warm.

It is the rapidly expanding gas that makes the noise (bang) assuming our bullet is subsonic. The gas is far better contained in the long barrel of a rifle than in the short barrel (with cyl gap) of a revolver or pistol. A semiauto rifle with allow the gas to escape out the action and will give a louder report.

I have issues with garden invaders in my yard - mostly rabbits. I have close neighbors and do not want noise but need to remove the problems. Lately I have been using CCI 22 lr cartridges marked QUIET and listing a mv of around 750 fps. I use a scoped bolt action single shot with a 24" barrel and get hardly any noise from it. These rounds are very nearly as quiet as a 22 short cb and are very accurate.

ward

I use RWS subsonic exclusively through my 77/22. It's a 40 grain bullet that is consistently subsonic, very quiet, and accurate to the extreme. The AAC Scarab keeps it very quiet. Just a point on the speed of sound; the temperature of the air is the greatest factor on when that speed is reached.

http://hyperphysics.phy-astr.gsu.edu...nd/souspe.html

Just enter a temp and hit the tab key. You can see that really extreme temps, like -40 changes things a lot. A change of 30f can make the bullet go super sonic, depending on its velocity.

I have used 22 short CB rounds in a Anschutz 22 rifle with 24" barrel indoors and the only thing you can hear is the firing pin dropping. They make no sound even without a supressor. I have used them for a long time as an indoor pistol round with my high standard Olympic and they make very little noise but I was surprised shooting them out of a rifle. For penetration, I can't imagine they would perform well although they do take care of small game and rodents.

I prefer 22 standard velocity ammo for everything. Remington is the best in my experience.

If you're lookng for something quiet to drop a rodent in a near by tree in the city, see about getting some old bb or cb caps.

Sounds like clapping your hands.

Will drop the rodent without bothering the neighbors.

I've had fun with all of them. With a Henry lever action and a Ruger Single Ten, I can enjoy about every type of 22 lr there is.

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Semper Fi

The CCI Long sub sonics work well for me in a bolt action rifle, single fed.
They have dispatched a number of coons in live traps. And I have shot a few coons eating my bird feed, at about 15 yards. I generally lung shoot them and they run 20-30 yards and tip over.
They are not super quiet but am not aware that anyone has heard me shoot.

The new CCI QUIET .22's are excellent! Out of a bolt action rifle they are extremely quiet and adequately accurate. I also like them because they are a FULL 40 grain bullet as opposed to the Shorts and CB's being 29 grains. If you are going to get the CB's, the Longs are better than the Shorts and I actually think they are quieter than the Shorts. The standard .22 Shorts (not the CB's) are OK but slightly louder than the "Quite" - CCI's are. The standard Shorts are not easy to find and when you do they are not cheap - but what else is new?!