Muffled 22

[Utah]

I was shooting 10/22... Some federal and some CCI
I've shot both these before, but I noticed the CCI was dispensing a considerably lesser "bang" then the federal... Like there was no high pitch sound to the shot whatsoever.. just more of a "thud"..
what would be the cause of this?

 

[P12]

Maybe it was subsonic.

 

[pitdogboy]

perhaps it was standard velocity vs the high velocity federal stuff?

 

[bcode]

Likely the CCI's are starting out subsonic - under 1070fps or so. The speed of sound depends on the conditions, but at 32°F (0°C) it's roughly 1088fps. No 'crack' means no sonic boom.

 

[Utah]

Likely the CCI's are starting out subsonic - under 1070fps or so. The speed of sound depends on the conditions, but at 32°F (0°C) it's roughly 1088fps. No 'crack' means no sonic boom.

Hmm, well it was likely -1 or -2 celcius... you think that would have effected it?

 

[bcode]

Hmm, well it was likely -1 or -2 celcius... you think that would have effected it?

It certainly can... I have experienced super-sonic rimfire ammo going subsonic in cold weather - so it's not unlikely.

If they normally sound the same when you go out, chances are the Federals were shooting just above and the CCI's just below supersonic in the colder weather.

 

[buffdog]

Velocity

The Velocity of the CCI ammunition was probably close to the speed of sound. By shooting in the -1 or -2 Celcius termperature range, it can reduce the cold ammunition in velocity.

It can also depend upon bullet weight. If the CCI stuff was a heavier bullet weight, that would affect velocity.

The only way to find out is to chronograph it. Many, many years ago, I shot Winchester Super-X out of a Remington 581 rifle. At 100 yards, it gave sub-one inch groups. The name Super-X has the connotation of great speed, but it later dawned on me that Super-X was actually target ammunition. Later when chronographs came within reach of the average shooter, I ran some old Super-X through the chronograph, and the speed was just slightly over the speed of sound.

For a practical experiment, you can take a box of ammunition and while at normal temperature, shoot it through the chronograph and get an average. Then stick the other half of the box of ammo into the freezer for a day, and shoot and chronograph it. You will find that the frozen ammo is lower velocity.

One time, living in a city, and faced with a Squirrel problem, I took a box of target .22 ammo and froze it before using it. Problem solved.
.

 

[bsand]

coooool

thanks for breaking the law!

 

[Utah]

coooool

thanks for breaking the law!

???

 

[Bop67]

???

I think he's trying to say you were now shooting "suppressed." Hence breaking the law, whereas it's just the weather. I've experienced the exact same before, but I have noticed CCI's are quieter in the cold, when all the elements come into play then it makes much more sense, imagine shooting some Aguila Super Colibri rounds

 

[Utah]

Very interesting, thanks fellas'

 

[cyclone]

coooool

thanks for breaking the law!

.....so...........much ?........

 

[Quebecer]

It certainly can... I have experienced super-sonic rimfire ammo going subsonic in cold weather - so it's not unlikely.

If they normally sound the same when you go out, chances are the Federals were shooting just above and the CCI's just below supersonic in the colder weather.

The speed of sound decreases with decreasing temperature. That would make ammunition louder as it gets colder. There must be another effect like others have said. The ammo is less powerful when cold.

I think it's probably your toque is covering your ears.

 

[Armament]

coooool

thanks for breaking the law!

hes rite cuz subsonic bullitz are illegal cuz they silence the gun like the ones that asassins use

 

[mmattockx]

coooool

thanks for breaking the law!

.....so...........much ?........

hes rite cuz subsonic bullitz are illegal cuz they silence the gun like the ones that asassins use

Gentlemen, I believe that bsand was referring to the quote below:

One time, living in a city, and faced with a Squirrel problem, I took a box of target .22 ammo and froze it before using it. Problem solved.
.

Pretty much every city or town in Canada has a no discharge bylaw, which would make shooting squirrels in your backyard illegal.

Mark