SilencerTalk

Sound Suppressor Discussion
It is currently Fri Jun 22, 2018 12:58 pm

All times are UTC-04:00




Post new topic  Reply to topic  [ 8 posts ] 
Author Message
PostPosted: Mon Jan 08, 2018 4:30 pm 
Offline
Silent But Deadly

Joined: Wed Feb 22, 2012 3:40 pm
Posts: 365
Location: Sin City, NV
I know that a shot fired from a short barrel will sound louder to the shooter than one fired from a long barrel. Will the report sound louder to something downrange as well?

Synopsis: I want to set up a bolt-action .22LR for suppressed shooting (with subsonic ammunition). The current barrel on one candidate (CZ 452) is 22.5" long; if I get the barrel cut, threaded, and crowned at 19", will it change the loudness of the downrange report versus a 20", 21", or 22" barrel?

There are many discussions about "optimal barrel length" with regard to velocity and accuracy, but none about report.

mbogo

_________________
6 stamps and counting (plus one in NFA jail). :mrgreen:


Top
   
BulletFlight for Android
PostPosted: Mon Jan 08, 2018 6:17 pm 
Offline
Silent But Deadly
User avatar

Joined: Sun Dec 09, 2007 4:55 pm
Posts: 673
I'll be entirely honest, I have two Savage Mk2 bolt action 22's.

The FVSR has a 16" barrel. The old MK2 has a 20 inch barrel.

I cannot tell that either is more or less quiet than the other.

_________________
I don't care what your chart says


Top
   
PostPosted: Mon Jan 08, 2018 8:12 pm 
Offline
Silent But Deadly
User avatar

Joined: Thu Jan 01, 2009 1:02 am
Posts: 11707
Location: Houston-ish
Same ammo, same suppressor, same host but a barrel difference of 3" what he said. You probably won't be able to hear the difference until you get the barrel under 12"

_________________
http://www.youtube.com/watch?v=BDtd2jNIwAU MUSAFAR!
http://www.youtube.com/watch?v=8CrOL-ydFMI This is Water DavidW
Complete Form 1s http://www.silencertalk.com/forum/viewtopic.php?f=10&t=79895


Top
   
PostPosted: Tue Jan 09, 2018 12:35 pm 
Offline
Silent But Deadly

Joined: Wed Feb 22, 2012 3:40 pm
Posts: 365
Location: Sin City, NV
I am inquiring about the report heard at the target, not the shooter.

mbogo

_________________
6 stamps and counting (plus one in NFA jail). :mrgreen:


Top
   
PostPosted: Tue Jan 09, 2018 2:14 pm 
Offline
Silent But Deadly
User avatar

Joined: Sun Dec 09, 2007 4:55 pm
Posts: 673
Theoretically, the long barrel would likely be a little more quiet.

Whether it is enough for the db meter to tell a meaningful difference 50 yards or more away... :?:

_________________
I don't care what your chart says


Top
   
PostPosted: Tue Jan 09, 2018 2:29 pm 
Offline
Silent But Deadly
User avatar

Joined: Sun Dec 20, 2015 9:15 pm
Posts: 989
19" vs 22" will be a very small difference. 22 vs 5, will be a big difference

_________________
300 blackout form 1: http://www.silencertalk.com/forum/viewtopic.php?f=10&t=137293


Top
   
PostPosted: Tue Jan 09, 2018 2:36 pm 
Offline
Silent But Deadly

Joined: Wed Feb 22, 2012 3:40 pm
Posts: 365
Location: Sin City, NV
I thank you all for your input.

mbogo

_________________
6 stamps and counting (plus one in NFA jail). :mrgreen:


Top
   
PostPosted: Tue Jan 09, 2018 7:00 pm 
Offline
Silent But Deadly
User avatar

Joined: Thu Jan 01, 2009 1:02 am
Posts: 11707
Location: Houston-ish
mbogo wrote:
I am inquiring about the report heard at the target, not the shooter.

mbogo

Same answer. If you start with a louder sound it will stay louder but if you can't really tell the difference at 1 meter you won't really be able to tell the difference at 100 or 1000 meters.

The intensity of the report will decrease over distance.

Go to this link.

http://www.sengpielaudio.com/calculator-distance.htm

Scroll down and enter the data then press calculate.

Let's say there is a 3dB difference between the rifle and the pistol, here is an example of the change between two different blast intensities at 100 meters vs 1 meter.

Image

Image

_________________
http://www.youtube.com/watch?v=BDtd2jNIwAU MUSAFAR!
http://www.youtube.com/watch?v=8CrOL-ydFMI This is Water DavidW
Complete Form 1s http://www.silencertalk.com/forum/viewtopic.php?f=10&t=79895


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 8 posts ] 

All times are UTC-04:00


Who is online

Users browsing this forum: No registered users and 4 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Powered by phpBB® Forum Software © phpBB Limited
[ GZIP: Off | Load: 0.26 ]