Just how quite?????

[sithlord]

The short of it is that a semi auto will never be as quiet at a bolt gun because of the action closing.

But, having said that, a supressor will make the 15-22 nice and quiet. Integrally suppressed as viper says, allows you to run high velocity ammo suppressed and is noticeably quieter than a sparrow (and the sparrow is nice and quiet). No real sound difference between hv and subsonic rounds in the integrally suppressed.

I've also, for comparison, ran subsonic ammo out of my 5.5" buckmark suppressed and un suppressed. In that case, even an un suppressed subsonic round is loud (probably hearing safe though).

To put everything another way, I've been asked by multiple people independently if I was dry firing a suppressed 22. The first time was by my wife right after we got the stamp. I then proceeded to do a mag dump and shower her with brass casings!

Wondering just how quite our rifles are with subsonic ammo and a suppressor?
The vids really are tough to judge. Sound quality osnt the best for gunfire.
Anyway just wondering????

Do you mean quiet?

I think auto correct is a liberal.. I've seen it misspelled in other suppressor threads on other forums as well!

 

[stickbug1]

Pretty darn quiet

This was using CCI "standard" velocity through a Gemtech Outback IID. According to CCI 1070fps. The loudest thing you hear is the action cycle and the bolt close. Absolutely no problems running them through the M&P15-22. Cycles just fine.

And yes I know, she forgot to put her eye protection back on. My bad.

The joys of a suppressed .22LR - YouTube

 

[Electraclyde]

Seems a bit conflicting.

With the full length 15-22 barrel (and suppressor), will either

a) CCI Std Velocity
and/or
b) CCI Quiet

Reliably cycle in a 15-22?

CCI standard would cycle my 15-22 and my other semi auto,s.
CCI quiet would not cycle any.

 

[ohbejuan]

I hope my sparrow is as quiet as that video I'm pretty sure I'd have the same giggle!

Then again, if I had the suppressor and an actual "giggle" switch, I'm pretty sure that would be the ultimate

 

[roadkill45]

any sub or standard runs in my 16" with an Outback II. I have not had an issue even with remington. sounds just like the video above. rabbit killer from heck! although i hit an antelope jack at about 60+ yards and the sub bullet bounced off the rabbits side! actually watched it through the scope. it broke all the ribs on the right side and croaked it but it did not puncture the bunny. wish i had a go-pro on that shot!

 

[backpacker21]

Yes, CCI Standard Velocity and Sub-Sonic both run flawlessly in my 15-22 with my Tac65 Suppressor. I rarely if ever have a fail to feed and I've never had one with this ammo. All I hear is the cycling of the rifle and the impact of the round on the target. It's a ton of fun and great for those Zombies!!
I've never tried CCI Quiet. I hope this helps.

Seems a bit conflicting.

With the full length 15-22 barrel (and suppressor), will either

a) CCI Std Velocity
and/or
b) CCI Quiet

Reliably cycle in a 15-22?

 

[little_airwolf]

Is there any way to make the action less nosiey?
The 10/22 is loud until you put in a tougher buffer.
Just wondering if there is some sort of trick for our 15-22?

 

[GhostMutt]

Is there any way to make the action less nosiey?
The 10/22 is loud until you put in a tougher buffer.
Just wondering if there is some sort of trick for our 15-22?

Packing the buffer tube with stuff & things (not the funkadelic song) foam/cloth etc could help silence the hollow noise, making it less noisy?
No, it is the nature of the beast, that metal on metal clack...check this out
How to make a M&P 15-22 cycle quieter
I doubt you are going to find any better answers on here...perhaps a bow and arrow would suit your needs better....what are you hunting by the way? Cats? Owls? Bats? Tiger Moths?

 

[RedNeck Jim]

Is there any way to make the action less nosiey?

Yep... shoot a bolt action.

 

[little_airwolf]

Can anyone tell me he Db level of using subsonics and a suppressor?
I've been reading and most suppressors lower the Db by 20-30.
I dont know how much switching to subsonics lowers the Db but Im guessing since its only 100fps slower. Not by much.
Anyway if anyone has any stats it would be fantastic!
Thank you

 

[RedNeck Jim]

I never have worried about db levels. You see folks always comparing one to another with just a few db difference... something the human ear can't detect. Also seems to me the testing that is posted, especially by individuals, is not very scientific with no standardization of equipment or technique.

Only thing that matters to me is how it feels to my ears & the ears of those around me. A 22lr shooting subsonic ammo is quiet enough for none of us to need hearing protection & quiet enough to not bother farm animals or neighbors. Beyond that, why would anyone care about the db? There is no appreciable difference between any of the name brand suppressors... nothing your ears would be able to tell.

I assume if you really need this info, you can go to the manufacturer's sites. IMO you are over-thinking this, or thinking about the wrong things. Material of manufacture and ease of disassembly for cleaning, FRP, along with a manufacturer's customer service, are much more important than comparing db.

To my ears, subsonic ammo is noticeably quieter than HV ammo, even with a pistol length barrel that keeps all rounds subsonic.

 

[little_airwolf]

Thanks for your input!

 

[BigWaylon]

Can anyone tell me he Db level of using subsonics and a suppressor?
I've been reading and most suppressors lower the Db by 20-30.
I dont know how much switching to subsonics lowers the Db but Im guessing since its only 100fps slower. Not by much.
Anyway if anyone has any stats it would be fantastic!
Thank you

Most rimfire cans are closer to the 36-42 dB reduction.

100fps can be a massive difference in noise depending on the starting point. For instance, dropping from 1150 -> 1050 is a much bigger difference than going from 1500 -> 1400, or from 1000 -> 900.

 

[Majorlk]

Keep in mind the fact that the dB scale is logarithmic; a 3 dB increase is DOUBLE the previous level and a 3 dB decrease is HALF the previous level.

A 36-42 dB reduction is massive.

 

[telero]

Also keep in mind that a 3 dB increase is a double of the pressure level, and a 10 dB increase is a 10x increase of the pressure level, but the perceived volume is not the same. A 10 dB increase in pressure is perceived as about a doubling of volume.

So a 30 dB reduction in pressure is one-thousandth the pressure level, and an eight of the perceived volume.

 

[RedNeck Jim]

Keep in mind the fact that the dB scale is logarithmic; a 3 dB increase is DOUBLE the previous level and a 3 dB decrease is HALF the previous level.

My degree is in Biology, so excuse my ignorance. But from what you state, a suppressor that is stated to be 3 db quieter than another, would be half as loud. From all I have read, there is really no discernible difference between the loudness of any of the name brand cans. Some claim to be several db quieter than the other, but no one claims their cans twice as quiet as the other.

 

[ChattanoogaPhil]

My degree is in Biology, so excuse my ignorance. But from what you state, a suppressor that is stated to be 3 db quieter than another, would be half as loud. From all I have read, there is really no discernible difference between the loudness of any of the name brand cans. Some claim to be several db quieter than the other, but no one claims their cans twice as quiet as the other.

I agree with that.

On rifles all cans are quiet enough, even the cheapest. Unless you got them side by side you'll likely not know the difference anyway. The only way it will matter is if you're shooting with your buddies and get into a "my can is quieter" debate. Typically you'll all agree that your own can is the quietest.

That said, when you get into pistols with very short barrels the difference becomes a bit more noticeable. What you mostly perceive is a "tone" difference. My YHM can has a lot of volume compared to my Sparrow. The YHM has a lower tone, Sparrow a bit higher tone.

CCI Quiet was mentioned earlier. Forget about it. Use Standard Velocity in your 15-22.

 

[sithlord]

Most rimfire cans are closer to the 36-42 dB reduction.

100fps can be a massive difference in noise depending on the starting point. For instance, dropping from 1150 -> 1050 is a much bigger difference than going from 1500 -> 1400, or from 1000 -> 900.

Remember too, that the sonic crack (the bullet exceeding the speed of sound) is approximately 140dB.

So, just using subsonics, you're below 140dB (probably around 110dB). Reduce another 30dB (from the suppressor), and you've got 80dB, which is deemed hearing safe.

These are rough figures, of course.

References:
Dangerous Decibels » How Loud is Too Loud?

http://guns.connect.fi/rs/bulnoise.GIF

 

[BigWaylon]

Remember too, that the sonic crack (the bullet exceeding the speed of sound) is approximately 140dB.

So, just using subsonics, you're below 140dB (probably around 110dB). Reduce another 30dB (from the suppressor), and you've got 80dB, which is deemed hearing safe.

Well, the sonic crack issue was the whole reason behind my post as to what FPS you start with.

With ~1100FPS being the speed of sound, the drop from 1150 to 1050 would be very noticeable if shooting suppressed. I've shot subsonic and supersonic ammo back to back out of the same host, in both 22LR and 9mm, and there's not a whole lot of difference unsuppressed other than tone.

 

[bigfruits]

little_airwolf - check out the video below for comparison of supersonic bulk ammo and CCI standard on a 16" barrel.

SilencerCo Sparrow, S&W M&P 15-22 Rifle, GSG-1911, M&P22 Pistol - YouTube

he starts shooting at 3:10 mins.