Thread: Subsonic 300BLK Noise levels

Download a Decibel Meter App to your phone and measure the noise in dB using a subsonic .22 as your control or baseline.

Try and chronograph your loads to ensure the Muzzle Velocity is consistently less than 1080 feet per second so you know the projectiles are not going supersonic.

I like to try for around 1050 FPS average just to be sure.

Cheers
Pete

Cheers I'll try that. I'm guessing a 22 sub should be ~110dB and the blackout 20/25dB higher than that? based on some googling. Having said that I'm doubtful a phone app is going to be terribly precise? haha.

Even cycling the action at our range is loud, so is a super 22.....

A bolt action should be quieter than an AR.

My 450 Bushmaster sub sonic upper is still pretty loud, but the barrel is fairly short, finishes inside a 12.5" hand guard

Originally Posted by Kiwi Greg

Even cycling the action at our range is loud, so is a super 22.....

um no its you that is the loud bugger at our range!!

Originally Posted by mikee

um no its you that is the loudest bugger at our range!!

LOL fixed it for you

here is a good example of sound this is his second video https://youtu.be/GGm8QCDPG8Y

i haven't tried your model of suppressor . . . but two of my earlier suppressor models i tried by well known nz makers were noisier than my present setup . .. thet are not all equals . . . sometimes not even close

I am thinking you ammo is going supersonic?
Me and a mate knocked over a mob of pigs the other day with very little sound of us banging away, he has a 16" Rem 700 300blk with a gen5 Hardy at the sound is no different to my 12" tikka 300blk with a ODL can. and both running 208gr A-Max.

Here's a vid of my brothers boy shooting my 300blk.

A .22 LR rifle with sub sonic ammo with a good suppressor wíll be c. 110-113 dB measured 1 m of the of the muzzle.

We are actually working on our .300 BLK specific model ( work more related to bullet channel size and optimum size vs. performance than other characteristics )

Quietest levels so far in our testing in .300 BLK with sub sonic ammo have been in the range of c. 130-132 dB with a 10-12" AR15 type rifle, 1 m left of the muzzle.

Levels at the shooters ear will be varying, due to the ejection port noise for example.

Figures from elsewhere that I would trust, measured with the right equipment indicate levels of c. 127-132 dB for sub sonic .300 BLK AR15 type rifle at 1 m left of the muzzle.

Best Regards!

Tuukka Jokinen
Ase Utra sound suppressors

Originally Posted by Tuukka

...

Figures from elsewhere that I would trust, measured with the right equipment indicate levels of ...

ie, equipment virtually no-one on here would have access to. You're wasting your time measuring this type of impulse sound with toy sound level meters. The necessary impulse meters are --seriously-- expensive

Hi, I think there is a misunderstanding of my post? We have had the correct type of SPL measurement equipment since the beginning of development of Ase Utra suppressors

What is was refering to was which are the usual levels for competing products from other countries, for which there is publicly available data that has been done by people who also have the right kit and know what they are doing.

Best regards!

Tuukka