Ever heard a suppressor whistle?

[AKM]

Went and shot 600 yesterday with my savage/sandman combo. I have 175 SMK with 41.5gr Varget loaded and a bunch of the rounds sounded like those old nerf footballs whistling down range.

Is it just escaping gasses or maybe the bullet? I don't see any sign of baffle strikes.

 

[Vaquero]

Need video.
I've no theory, I just want to hear it.

 

[sucker76]

Tagging in for a video.
I haven't heard a whistle with mine but sometimes a ringing which I think is sound reflecting back from the tin roof above shooting bench.

 

[toddnjoyce]

What was the wind like?

 

[AKM]

What was the wind like?

1/2 to 1.4 mils at 600. Not every round did it either. I thought maybe it was wind, or gasses escaping.

It'll be a while before I go back the range is an hour away with hellacious traffic.

 

[toddnjoyce]

1/2 to 1.4 mils at 600. Not every round did it either. I thought maybe it was wind, or gasses escaping.

It'll be a while before I go back the range is an hour away with hellacious traffic.

I was thinking wind around the shooting area.

 

[AKM]

I was thinking wind around the shooting area.

It wasn't wind howling if that's what you mean, it was "bang, whistle, clang of the target"

 

[Younggun]

I’ve heard whistling from 9mm suppressed shot at longer distances. Was easy to tell it was the bullets though.


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[FireInTheWire]

I have not experienced a whistle with any of my cans. That's very odd. The only thing that makes sense in my mind is the relationship of the wind on the bullet with your FFP.

 

[Joshua - Capitol Armory]

I have many times from the bullet in flight. A 45-70 subsonic projectile in flight is like a giant angry bee.

 

[orbitup]

What is the twist rate on your barrel? If it's a 1:12 then your bullet is unstable and that's why you hear it. That could cause a baffle strike at some point.

 

[SloppyShooter]

I say, I say, it's the bullet, son. The suppressor allowed you to hear it.

Trust me, I'm an expert on theoretical hypothetical scenarios, unsubstantiated and totally developed in my head.

Curious to know though, the timing and duration of the whistle. It could be the suppressor itself, and another theory to consider: the cooling and contracting gasses in the barrel are pulling air back in, across the baffles.

Either way, air density, temp, and wind probably had to be at some golden point for it to occur.

My wife one day said about the F-16's flying overhead: " I just hate to hear the people screaming. " Needless to say, after I stopped laughing, I explained to her that there are a couple of things that look like 2 scuba fins together, inside they are hollow with holes that release the air, basically a big scoop with a smaller area for the wind to escape. Air brakes.

They do sound a bit like a scream, but the sound is based on the same principle as flutes and whistles.

 

[AKM]

What is the twist rate on your barrel? If it's a 1:12 then your bullet is unstable and that's why you hear it. That could cause a baffle strike at some point.

1:10 should be good for 175 and 41.5. Varget, also I'm running 2561fps on average so that part SHOULD be fine you'd think.

 

[orbitup]

1:10 should be good for 175 and 41.5. Varget, also I'm running 2561fps on average so that part SHOULD be fine you'd think.

Well, there goes my theory.

 

[Chirpy]

"No, but if you hum a few bars I'll fake it"

 

[AKM]

Well dammit, talked to Dead air and they think and they think it's the bullets not stabilizing.

Only problem is if shot the same load before with no issues, and it's all the same batch.

 

[AKM]

I say, I say, it's the bullet, son. The suppressor allowed you to hear it.

Trust me, I'm an expert on theoretical hypothetical scenarios, unsubstantiated and totally developed in my head.

Curious to know though, the timing and duration of the whistle. It could be the suppressor itself, and another theory to consider: the cooling and contracting gasses in the barrel are pulling air back in, across the baffles.

Either way, air density, temp, and wind probably had to be at some golden point for it to occur.

My wife one day said about the F-16's flying overhead: " I just hate to hear the people screaming. " Needless to say, after I stopped laughing, I explained to her that there are a couple of things that look like 2 scuba fins together, inside they are hollow with holes that release the air, basically a big scoop with a smaller area for the wind to escape. Air brakes.

They do sound a bit like a scream, but the sound is based on the same principle as flutes and whistles.

It sounded like the second it hit open air it whistled until it hit steel.

My buddy reminded me I actually shot 3 different rounds and all 3 did it. Shot probably 50 rounds in all.

175smk handloads,
168gr federal SMK, match(factory), and Aguila 150 I needed to get rid of.

Hopefully next week I'm going to my buddies place to try and trouble shoot. I need to check for rub marks on the baffles also, only looked for hard strikes before.

The whole thing doesn't make sense to me.

 

[Younggun]

Could just be part of the tiny sonic boom the bullets are making on their way to the target.

You got rid of the muzzle report, but the crack of this bullet is still there.


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[HKShooter65]

Thread rating is high on the speculometer!

Video with sound please, and our wrong opinions might be closer to the truth.

 

[SloppyShooter]

Thread rating is high on the speculometer!

Video with sound please, and our wrong opinions might be closer to the truth.

Yeah.....that might be a problem. You know how your dog does all those amazing things, and then company comes over and all he does is lay around and lick his balls? Yeah ....kinda like that..... now, if it did it every time .... that'd be different.

Kinda strange...guns are usually mostly consistent from throat to muzzle. But hearing it all the way means bullet, anyway, and the suppressor itself (although a possible contributing factor,) is allowing it to be heard, not whistling itself, ( unless those two shots were really, really good, and that suppressor was impressed.)