300 blk coaxial build almost done -- Range Report.

[Hard_ware]

Try spinning the spacer vents 180* along their axis.
Also, move the cleaner baffles towards the muzzle so you can get some good carbon comparisons.

+1

also try a 90degree shift and see if that lowers sound.

[JFettig]

300blk isn't that quiet, especially on an AR. That can looks like its 1.5"x6", I wouldn't be surprised if its around 140db. People often say its mouse fart quiet, but even with a big specwar on a 10.5" AR, its still pretty loud.

Your clips are about as big as I'd go the way you're doing it, notching could go deeper but I wouldn't do both.

[policetruck]

Thanks for the advice guys. I've re-oriented the components to alternate 180 deg every cone. I can also rotate and or flip the spacers independently from the cones. So, yeah I'm going to just play with orientation for now.

I also did find out that the Remington subs aren't to far from the sound barrier. So I could see how some differences in load repeatability and whatnot could cause some sound differences. I was thinking of trying some freedom munitions hush rounds. They are rated a bit slower.

[fishman]

300blk isn't that quiet, especially on an AR. That can looks like its 1.5"x6", I wouldn't be surprised if its around 140db. People often say its mouse fart quiet, but even with a big specwar on a 10.5" AR, its still pretty loud.

A good silencer designed for 300 blk can definitely bring subsonic sound levels well below those of an AR action cycling. The action noise might be what op is dissatisfied with. An adjustable gas block and/or a heavy buffer should help with that

[T-Rex]

Thanks for the advice guys. I've re-oriented the components to alternate 180 deg every cone. I can also rotate and or flip the spacers independently from the cones. So, yeah I'm going to just play with orientation for now.

Don't rotate the cones. Spin the spacers 180 so they are on the same side as the clip. Instead of trying to use the cross-jet to force the gas into the coaxial space, let the pressure differential do it for you. Your can is not welded so use that to your benefit.

[policetruck]

T-rex, I understand. I'll try that out too.

I'm not complaining about the action noise, I have a govnah adjustable gas block and I can turn the gas off completely, which is how I shoot it during this testing phase.

[John A.]

Here is what I meant by changing powders (ammo) could make a big difference in how it sounds. I know that youtube videos are difficult to judge how it sounds in person, but you should still be able to tell the difference in how loud the factory ammo was, and even the 1680 powder.

Same gun, same suppressor, different powders is the only difference. Listen to them with the factory federal American Eagle bullets to start with and then listen to the last few bullets that I fired.

The factory bullets reminded me of someone banging garbage can lids together. Hardly how suppressed guns should sound.

https://www.youtube.com/watch?v=-N8LCdHKyJU