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Posted: 2/13/2019 11:35:08 PM EDT
I've been curious about what's going on inside this thing since I saw pictures of it last year.  They just posted some new stuff to their FB page:

https://www.facebook.com/hallandpepper/

https://www.gunsamerica.com/digest/hp-manufacturing-ugliest-suppressor-shot-show-2019/

Link Posted: 2/13/2019 11:42:00 PM EDT
[#1]
My money says it doesn't work worth a shit.
Link Posted: 2/13/2019 11:42:07 PM EDT
[#2]
Quoted:
I've been curious about what's going on inside this thing since I saw pictures of it last year.  They just posted some new stuff to their FB page:

https://www.facebook.com/hallandpepper/

https://www.gunsamerica.com/digest/hp-manufacturing-ugliest-suppressor-shot-show-2019/

https://i.postimg.cc/VNNY5DsX/HP.jpg
View Quote
All the downsides of a reflex can with none of the benefits?
Link Posted: 2/13/2019 11:51:55 PM EDT
[#3]
It looks awesome. Very aggressive, which is sometimes needed.
Link Posted: 2/14/2019 12:03:17 AM EDT
[#4]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
My money says it doesn't work worth a shit.
View Quote
Link Posted: 2/14/2019 12:17:39 AM EDT
[#5]
I'm curious to try it.
Link Posted: 2/14/2019 12:23:27 AM EDT
[#6]
Just because you can, doesnt mean you should...

I'm interested in hearing how it actually performs.
Link Posted: 2/14/2019 12:26:46 AM EDT
[#7]
Is it integrated with the rail/hand guard ?
Link Posted: 2/14/2019 12:35:14 AM EDT
[#8]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
My money says it doesn't work worth a shit.
View Quote
Skepticism is always a safe choice with anything new, but the article cites them as saying mid-130's.  We shall see...
Link Posted: 2/14/2019 1:31:17 AM EDT
[#9]
The article also mentions lower back pressure with semi autos.  Seeing how it supposedly redirects the gas downward into that lower expansion chamber area might be some truth to that.  As always when they are out in the wild and some real world independent testing can be done with guys like NFA Review and MAC etc......... if the claims are proven true then fugly for the win.  Function over form always if the thing works like advertised.
Link Posted: 2/14/2019 1:39:34 AM EDT
[#10]
Better, meaning more believable, than the absurd claims of Jesse Douchecanoe James Firearms.
Link Posted: 2/14/2019 2:40:21 AM EDT
[#11]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Better, meaning more believable, than the absurd claims of Jesse Douchecanoe James Firearms.
View Quote
Did we ever get the story behind those numbers?  I just assumed he was using his phone for measuring the sound levels...
Link Posted: 2/14/2019 7:16:12 AM EDT
[#12]
Discussion ForumsJump to Quoted PostQuote History
Quoted:Function over form always if the thing works like advertised.
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Not when it has points and sharp corners on it.
Link Posted: 2/14/2019 9:07:21 AM EDT
[#13]
Link Posted: 2/14/2019 9:50:20 AM EDT
[#14]
Looks like another "flow through" design such as the Helix from OSS.



The center of the can is just a hollow tube.  The gas goes to the outside of the tube and passes over many small machined ridges. Then is free to exit out the front.



There is little back pressure because the can let's all the gas flow out the open front of the can.

https://m.youtube.com/watch?v=cY1r5a_SZBc
Link Posted: 2/14/2019 10:12:49 AM EDT
[#15]
Is that a maze of expansion chambers underneath that ultimately vents out in the front?
Link Posted: 2/14/2019 10:54:52 AM EDT
[#16]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Just because you can, doesnt mean you should...

I'm interested in hearing how it actually performs.
View Quote
If it can't set a new record for quietest silencer on the market then it will go under and reappear in GD threads ten years from now when some newb asks WTF is this?

I will be quietly rocking on the Sunset Autumn acres deck ogling 75 year old bathing beauties doing watercize.
Link Posted: 2/14/2019 10:56:58 AM EDT
[#17]
Quoted:
The article also mentions lower back pressure with semi autos.  Seeing how it supposedly redirects the gas downward into that lower expansion chamber area might be some truth to that.
View Quote
It's another space age thing that was modeled with computer generated flow analysis.    Problem is, very high pressure supersonic gasses don't behave anything like those models show, especially with the very short duration which the bullet impedes direct flow.  The maze of chambers are just dead weight, and the lack of expansion chamber indicates to me that it will actually have higher backpressure than conventional designs.
Link Posted: 2/14/2019 11:33:24 AM EDT
[#18]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Robert A. Moore patented a similar style suppressor back in 1910 to compete against Maxim.  Moore Patent
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Yep. It resembles early attempts at working around the Maxim patents.
Link Posted: 2/14/2019 11:54:10 AM EDT
[#19]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Is that a maze of expansion chambers underneath that ultimately vents out in the front?
View Quote
Yes--they are joining others who are following OSS's lead and trying to figure out how to redirect the gases instead of simply trapping them.  At this point I think it's established by multiple companies and designs that this approach can lower ear levels compared to conventional baffles.  It remains to be seen if anybody can also match muzzle levels--right now they appear to sacrifice muzzle levels to lower ear levels (based on the limited data I've seen).

From memory, the list of companies adopting the "flow through" approach include OSS, Delta P, MaxFlo 3D, Thermal Defense, and Larue.
Link Posted: 2/14/2019 1:22:40 PM EDT
[#20]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Yes--they are joining others who are following OSS's lead and trying to figure out how to redirect the gases instead of simply trapping them.  At this point I think it's established by multiple companies and designs that this approach can lower ear levels compared to conventional baffles.
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Not unless you believe every word from the companies themselves.  Until there is reliable independent testing or these companies start putting out raw videos like Ray @ TBAC, it's all hype.

The notion that you have to accept high muzzle SPL to get acceptable at-ear numbers is hogwash.  It's just the paradigm for science-fiction-come-to-life designs like this thing.  Conventional baffle cans are perfectly capable of producing hearing safe SPL at mil std muzzle position and shooter's ear.

I'd put down $100 that the cheap YHM Turbo has better performance on both ends than this thing.
Link Posted: 2/14/2019 2:14:27 PM EDT
[#21]
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Quoted:

Not unless you believe every word from the companies themselves.  Until there is reliable independent testing or these companies start putting out raw videos like Ray @ TBAC, it's all hype.

The notion that you have to accept high muzzle SPL to get acceptable at-ear numbers is hogwash.  It's just the paradigm for science-fiction-come-to-life designs like this thing.  Conventional baffle cans are perfectly capable of producing hearing safe SPL at mil std muzzle position and shooter's ear.

I'd put down $100 that the cheap YHM Turbo has better performance on both ends than this thing.
View Quote
Respectfully, you're a little behind on this question. I would say it's been amply demonstrated by multiple independent third-party testers at this point that with a normal AR-15/10 unless you adjust the gas almost all baffle designs are much higher at the ear than the muzzle--most of the popular ones are over 140 at the ear, especially if they get into the mid-130's at the muzzle.

Go look at the data at NFAtalk.org, Suppressed Nation and MAC videos, what Pete at TFB has been doing, etc.
Link Posted: 2/14/2019 2:37:13 PM EDT
[#22]
Discussion ForumsJump to Quoted PostQuote History
Quoted: I would say it's been amply demonstrated by multiple independent third-party testers at this point that with a normal AR-15/10 unless you adjust the gas almost all baffle designs are much higher at the ear than the muzzle
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What kind of moron would accept 150 dB muzzle to get just under 140 dB ear instead of spending $50 on an adjustable gas block to get mid-high 130s on both ends?
Link Posted: 2/14/2019 3:26:17 PM EDT
[#23]
Discussion ForumsJump to Quoted PostQuote History
Quoted:

Not unless you believe every word from the companies themselves.  Until there is reliable independent testing or these companies start putting out raw videos like Ray @ TBAC, it's all hype.  ...

I'd put down $100 that the cheap YHM Turbo has better performance on both ends than this thing.
View Quote
This is my suspicion as well.  The Turbo puts volume where it it matters, out in front of the pressure wave.

I bet if this suppressor blocked off the port to the under side labyrinth, both the back pressure and the muzzle numbers would change insignificantly.

Simple reflex chambers do a good job of reducing back pressure, mainly because the annular volume sees less resistance to 'flow' (actually more like pressure capacitance or an air spring) than the more restricted muzzle orifice and barrel-conduit.  With designs like this there is a race condition between gas pressure dropping through the labyrinth and out the front diffuser, and simply back-spilling through the bore when the action opens.  The slower the action, the better this will sound, but adjustable gas blocks already do that for blast enveloping designs.  I'm sure it has some benefit, but that's a lot of metal and mass for what are probably minimal gains.

I think a better implementation of these concepts (pressure drop of gases whose flow is already moving off the bore line and dispersion through front diffusers) is the Delta P .50 cal suppressor.
Link Posted: 2/14/2019 6:32:37 PM EDT
[#24]
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Quoted:

What kind of moron would accept 150 dB muzzle to get just under 140 dB ear instead of spending $50 on an adjustable gas block to get mid-high 130s on both ends?
View Quote
You are exaggerating the numbers on both ends in favor of your position, but I'm not going to re-hash old arguments here.

It is a (somewhat) free country, and you are free to modify your guns as much as you desire. I just think it's nice that options are becoming available for the many people who will never touch their gas block or have other reasons to avoid the need to change gas settings.
Link Posted: 2/14/2019 7:43:22 PM EDT
[#25]
Link Posted: 2/14/2019 8:35:36 PM EDT
[#26]
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Quoted:
You are exaggerating the numbers on both ends in favor of your position
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Quoted:
You are exaggerating the numbers on both ends in favor of your position
And you know this based on your vast personal suppressor testing experience?

I actually own a 2209 meter, I actually manufacture suppressors, and I actually use the ones I have.  Did you ever even fire the OSS cans you bragged about owning but admitted to never having used while defending the product and their 5 meter testing nonsense?  How many others do you own?  Have you ever fired a can with a legitimate impulse sound meter present?

A lot of the manufacturer published dBA figures are hokum.  TBAC is honest, and I've never seen anything out of line from AAC.  SilencerCo is full of shit, and they're not the only company who fudges the testing protocol or only posts the best numbers ever seen on the quietest hosts with the most cream puff ammo.

Quoted:

I just think it's nice that options are becoming available for the many people who will never touch their gas block or have other reasons to avoid the need to change gas settings.
Sure, options are nice.  But I've been in this game awhile, never known anyone who'd rather deal with an overpriced, overwieght, poor performing suppressor than install a different gas block and spend a few minutes adjusting it to run both suppressed and unsuppressed.  The only AR I have that needs adjustment after initial is a 13" barreled post sample .308 that will not run full auto suppressed with the gas open enough to run unsuppressed.

Quoted:
The cute labyrinth beneath the can will never get fed.  The gas is going to go through the hole in the baffle/ path of least resistance.
Exactly.  That's what I was getting at when I said these CG flow models have no application in suppressor design.
Link Posted: 2/14/2019 10:20:56 PM EDT
[#27]
Nice theory, but gas does not flow like that.
Link Posted: 2/14/2019 11:15:33 PM EDT
[#28]
Discussion ForumsJump to Quoted PostQuote History
Quoted:

And you know this based on your vast personal suppressor testing experience?

I actually own a 2209 meter, I actually manufacture suppressors, and I actually use the ones I have.  Did you ever even fire the OSS cans you bragged about owning but admitted to never having used while defending the product and their 5 meter testing nonsense?  How many others do you own?  Have you ever fired a can with a legitimate impulse sound meter present?

A lot of the manufacturer published dBA figures are hokum.  TBAC is honest, and I've never seen anything out of line from AAC.  SilencerCo is full of shit, and they're not the only company who fudges the testing protocol or only posts the best numbers ever seen on the quietest hosts with the most cream puff ammo.
View Quote
Are we really doing this again?

I didn't say a word about my experience--I pointed to other sources.  For example, from https://www.thefirearmblog.com/blog/2018/09/01/oss-suppressors/

on a 16" 5.56:

MODEL: OSS HX-QD 556MILSTD Muzzle

145.8
137.1
140.7
138.1
140.8
138.3
138.7
138.9
139.6
139.8

That's not exactly "150 dB muzzle"

If there's something that can beat these ear numbers on a 16" 7.62 semi-auto, I haven't seen it yet:

137.2
135.1
137.
139.9
137.2
136.8
137.2
137.1
136.9
136.1

Also this https://www.thefirearmblog.com/blog/2018/08/11/oss-helix/

Test Silencer: OSS HX-QD 556Host: Dynamic Defense 18" Romeo with adjustable gas block
Ammunition: 62gr Federal Fusion SP

Meter Location: MILSTD Muzzle

144.8 (failure to feed)
142.4 (FTF) (1/4 turn open on SLR gas block)
140.5
139.2
142.1
141.5

Meter Location: Right Ear

136
135.8
136.1
136
135.1
134.6
134.7
138.1
136
136.2
136.5
135.8
137.7
137.6
140+ (bolt hold open)

And there's this for Delta P on a 5.56: https://www.thefirearmblog.com/blog/2019/01/05/3d-printed-silence/

BCM 18"

MILSTD Muzzle

140+
140+
141
140.1
138.8
136.1
139.5
139.1
139.3
139.9
134.8

Ear

138.2
137.8
137.2
138.8
140+
137.7
139.4
138.6
138

Delta P Prototype

BCM 18"

MILSTD Muzzle

142.6
139
140.5
140.9
140.8
140.5
141
140
139.1
141

Ear

140
138.8
138.3
138.9
138.2
138.7
138.8
140+
137.6
139.9

The only data I've seen for the MaxFlo 3D is in the NFATalk spreadsheet--using a 10.5" piston gun they got 142.9 muzzle and 136.5 ear.

I'd like to see more testing done with all of these new alternative designs, but to say "What kind of moron would accept 150 dB muzzle to get just under 140 dB ear" is a significant exaggeration based on the data available so far.
Link Posted: 2/15/2019 12:01:31 AM EDT
[#29]
Discussion ForumsJump to Quoted PostQuote History

I'd like to see more testing done with all of these new alternative designs, but to say "What kind of moron would accept 150 dB muzzle to get just under 140 dB ear" is a significant exaggeration based on the data available so far.
View Quote
Still cherry picking your data, I see.

BTW, even my stubby Five By Five put down better numbers at both ends shooting inside a 12x24 room on a 10.5" cheapie PSA uppered SBR than the OSS 5.56K, and better ear numbers than the 5.56 standard managed on 12" or 16" premium rifles.  Tested with a B&K Pulse system, mil spec left & right positions averaged 145.04, shooter's ear averaged 140.03.  This is a 5" long can, 1-9/16" diameter.  Oh, and I charge $300 less than OSS.

At any rate, from your links:

Model: OSS HX-QD 556K
Host: Dynamic Defense 12” Sierra

https://dynamicdefensedevelopment.com/product/sierra/
Ammunition: Federal 62gr M855

MILSTD Muzzle

140+

152.5

151.4

152.3

151.9

150.9

151

150.4

150.7

150.8

At The Ear

141

141.7

142

140

140.3

142.2

142.4

141.1

143.1

142.5 BHO

Model: OSS HX-QD 556

MILSTD Muzzle

149.5

142.6

142.

143.7

143.9

144.6

143.5

144.6

143.9

144.2

At The Ear

140.6

141

142

141.5

140.4

140.5

139.2

138.1

139.5

138.1 BHO

For the 5.56K, that's a muzzle average of 151.3 and @ ear average of 141.6.  (What was that about my numbers being exaggerated?)

For the full size, muzzle avg. 142.25 ear avg. 140.09

And besides being larger cans on a longer barrel, that's shooting outdoors on a meter with less peak impulse sensitivity than the Pulse I tested my 1.56x5" model on.  The 6.5" long YHM Turbo will beat the OSS cans by an even bigger margin.

But this thread is not about OSS.  It's about a can that, as far as I can tell, will perform even worse.  Something I hadn't even mentioned yet, but sharp corners in suppressors also make for a snappy tone.  I'm sure you'll excuse that, too, though.  I can't for the life of me understand why you so vehemently defend some of the most overpriced, under-performing products on the market, but it seems to be your mission.
Link Posted: 2/15/2019 1:19:01 AM EDT
[#30]
Discussion ForumsJump to Quoted PostQuote History
Quoted:

Still cherry picking your data, I see.

BTW, even my stubby Five By Five put down better numbers at both ends shooting inside a 12x24 room on a 10.5" cheapie PSA uppered SBR than the OSS 5.56K, and better ear numbers than the 5.56 standard managed on 12" or 16" premium rifles.  Tested with a B&K Pulse system, mil spec left & right positions averaged 145.04, shooter's ear averaged 140.03.  This is a 5" long can, 1-9/16" diameter.  Oh, and I charge $300 less than OSS.

At any rate, from your links:

Model: OSS HX-QD 556K
Host: Dynamic Defense 12" Sierra

https://dynamicdefensedevelopment.com/product/sierra/
Ammunition: Federal 62gr M855

MILSTD Muzzle

140+

152.5

151.4

152.3

151.9

150.9

151

150.4

150.7

150.8

At The Ear

141

141.7

142

140

140.3

142.2

142.4

141.1

143.1

142.5 BHO

Model: OSS HX-QD 556

MILSTD Muzzle

149.5

142.6

142.

143.7

143.9

144.6

143.5

144.6

143.9

144.2

At The Ear

140.6

141

142

141.5

140.4

140.5

139.2

138.1

139.5

138.1 BHO

For the 5.56K, that's a muzzle average of 151.3 and @ ear average of 141.6.  (What was that about my numbers being exaggerated?)

For the full size, muzzle avg. 142.25 ear avg. 140.09

And besides being larger cans on a longer barrel, that's shooting outdoors on a meter with less peak impulse sensitivity than the Pulse I tested my 1.56x5" model on.  The 6.5" long YHM Turbo will beat the OSS cans by an even bigger margin.

But this thread is not about OSS.  It's about a can that, as far as I can tell, will perform even worse.  Something I hadn't even mentioned yet, but sharp corners in suppressors also make for a snappy tone.  I'm sure you'll excuse that, too, though.  I can't for the life of me understand why you so vehemently defend some of the most overpriced, under-performing products on the market, but it seems to be your mission.
View Quote
I wish I had a gif of somebody beating their head against a wall, because that's where we are at this point.

Do the terms straw man or red herring mean anything to you?  You ought to look them up.

Nobody said OSS was perfect.  YOU made a broad generalization that flow-through designs  require accepting "150 dB muzzle to get just under 140 dB ear".

I said you were exaggerating/misrepresenting.

You challenged my basis for my statement.

I provided some hard data (generated with a 2209) that showed you were exaggerating/misrepresenting.

You respond by picking the worst possible example and ignoring everything else, as if that validates your claims?  YOU'RE the one cherrypicking.  Maybe you don't understand how this works--to DISPROVE something you simply have to provide any data that contradicts the claim.  To PROVE a claim there can be no exceptions that contradict.  If you'd like to add a little nuance and detail and revise your claims feel free, but don't try to play logic games with me--I have a degree in math and logic is my specialty.

I used OSS only because that's where most of the available data is found and their claims about essentially eliminating increases in backpressure are essentially accepted at this point.  I don't know anything more about H&P Manufacturing than what's in the links I provided--I just shared it here in case anybody else found it interesting.  You are free to say anything you want about it and I will have no reason to respond to it, but if you make broader generalizations then I'm going to correct them because there might be people reading this who wouldn't know any better if I didn't and I think it's a good idea to keep the record straight and not to allow bad information to perpetuate.
Link Posted: 2/15/2019 10:12:49 AM EDT
[#31]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
I think a better implementation of these concepts (pressure drop of gases whose flow is already moving off the bore line and dispersion through front diffusers) is the Delta P .50 cal suppressor.
View Quote
Only a hunch on my part, but at least a portion of the decent results from that can have to relate to the length of the barrel and the relatively slow powder. Plenty of time to redirect gas, and plenty of room in a half inch bore. It's just more forgiving to flow, overall.
Link Posted: 2/19/2019 11:08:09 PM EDT
[#32]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
I wish I had a gif of somebody beating their head against a wall, because that's where we are at this point.

Do the terms straw man or red herring mean anything to you?  You ought to look them up.

Nobody said OSS was perfect.  YOU made a broad generalization that flow-through designs  require accepting "150 dB muzzle to get just under 140 dB ear".

I said you were exaggerating/misrepresenting.

You challenged my basis for my statement.

I provided some hard data (generated with a 2209) that showed you were exaggerating/misrepresenting.

You respond by picking the worst possible example and ignoring everything else, as if that validates your claims?  YOU'RE the one cherrypicking.  Maybe you don't understand how this works--to DISPROVE something you simply have to provide any data that contradicts the claim.  To PROVE a claim there can be no exceptions that contradict.  If you'd like to add a little nuance and detail and revise your claims feel free, but don't try to play logic games with me--I have a degree in math and logic is my specialty.

I used OSS only because that's where most of the available data is found and their claims about essentially eliminating increases in backpressure are essentially accepted at this point.  I don't know anything more about H&P Manufacturing than what's in the links I provided--I just shared it here in case anybody else found it interesting.  You are free to say anything you want about it and I will have no reason to respond to it, but if you make broader generalizations then I'm going to correct them because there might be people reading this who wouldn't know any better if I didn't and I think it's a good idea to keep the record straight and not to allow bad information to perpetuate.
View Quote
So...

Have you actually shot your suppressors yet or...
Link Posted: 3/1/2019 8:01:00 PM EDT
[#33]
I thought it may be good to show some video of this thing in action, I wasn't aware of this thread until someone told me about it. Yes it works. The video shows that we are able to divert the majority of the gases thru the ducts as opposed to following the bullet thru the exit opening.
The measurements were taken with a Larson Davis 800B meter, which is used for Mil Spec testing. I don't take measurements with cell phones or other inadequate equipment. Hopefully the youtube video works properly.
https://www.youtube.com/watch?v=kpH65VPV4j4

UGLY338 Gas Exit in Slow Motion
Link Posted: 3/1/2019 8:51:45 PM EDT
[#34]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
I thought it may be good to show some video of this thing in action, I wasn't aware of this thread until someone told me about it. Yes it works. The video shows that we are able to divert the majority of the gases thru the ducts as opposed to following the bullet thru the exit opening.
The measurements were taken with a Larson Davis 800B meter, which is used for Mil Spec testing. I don't take measurements with cell phones or other inadequate equipment. Hopefully the youtube video works properly.
https://www.youtube.com/watch?v=kpH65VPV4j4

https://www.youtube.com/watch?v=kpH65VPV4j4
View Quote
Did I miss seeing the mic’s or meter?
Link Posted: 3/1/2019 9:25:50 PM EDT
[#35]
UGLY338 Gas Exit in Slow Motion
Link Posted: 3/1/2019 10:57:18 PM EDT
[#36]
Sound meter wasn't shown in that video.
Measurements were taken at a different point in the day along with measurements for other calibers/designs.
Link Posted: 3/1/2019 11:16:29 PM EDT
[#37]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
I thought it may be good to show some video of this thing in action, I wasn't aware of this thread until someone told me about it. Yes it works. The video shows that we are able to divert the majority of the gases thru the ducts as opposed to following the bullet thru the exit opening.
The measurements were taken with a Larson Davis 800B meter, which is used for Mil Spec testing. I don't take measurements with cell phones or other inadequate equipment. Hopefully the youtube video works properly.
https://www.youtube.com/watch?v=kpH65VPV4j4

https://www.youtube.com/watch?v=kpH65VPV4j4
View Quote
Just curious - what was the host that was used in the video?
Link Posted: 3/2/2019 10:46:05 AM EDT
[#38]
Rifle is a hodge-podge of parts assembled by me. Mausingfield bolt action, Barlein heavy varmint barrel, Masterpiece Arms BA Chassis, Atlas Bipod, XTSP trigger, Nightforce ATACR 7-35 scope, American Rifle Company scope rings.
.338 Lapua Magnum is not what I prefer to take to the range but I have it for testing the designs. Ammunition used was handloads of 285gr Hornady ELD-M over 90.5gr of IMR 7977 that ran 2667fps on that day.
Link Posted: 3/3/2019 1:16:23 AM EDT
[#39]
You mentioned other calibers--will you be telling us what kind of numbers you got, or was it just part of your R&D?
Link Posted: 3/3/2019 11:01:59 AM EDT
[#40]
On that day I also metered our non-Ugly designs. They have a more traditional shape but have complex baffle designs that only additive manufacturing can produce. They weather was not cooperating so we setup for measuring at the shooter's location and not the Mil spec testing configuration. So please keep in mind that these are not mil-spec ratings but should be within 2 or 3dB of the mil-spec values. Here's a summary of the 4 baffle configurations. Values are averages.
Config 1
.223 Rem AR 18" barrel: 144dB
.223 Bolt gun 20" Barrel: 129dB
.223 Bolt gun 24: barrel: 128dB
6x47Lapua Bolt gun 28" barrel: 128dB, For reference my Thunderbeast 30P-1 metered at 130dB and the sound was very comparable to my friend's ultra 9. I didn't meter the ultra 9 because I couldn't put it on any of these host guns for direct comparison.

Config 2
.223 AR 18" Barrel: 143dB
.223 Bolt gun 24" barrel: 126dB

Config 3
.223 AR 18" Barrel: 144dB
.223 Bolt gun 24" barrel: 125dB

Config 4
.223 AR 18" Barrel: 144dB
.223 Bolt gun 24" barrel: 127dB

It appears that the meter was registering something in the action, probably the bolt slamming. Mil spec testing may actually produce significantly lower values due to the fact that the meter will be place further away from the cycling of the bolt carrier.
Link Posted: 3/3/2019 4:18:17 PM EDT
[#41]
There's a lot of variability/noise in that data but then again real world action noise, different powder pressure-time curves, atmospheric and environmental conditions and reflective surfaces are a real thing.  If 2" of barrel is that effective a small increase in blast chamber volume would also help but I'd guess you've already tested that response sensitivity.  More than likely gas system dwell time and bolt speed are the independent variables affecting your measurements.

Have you tried blocking off your diffuser/capacitance section to optimize the blast-forward stack?
Link Posted: 3/3/2019 10:32:10 PM EDT
[#42]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
On that day I also metered our non-Ugly designs. They have a more traditional shape but have complex baffle designs that only additive manufacturing can produce. They weather was not cooperating so we setup for measuring at the shooter's location and not the Mil spec testing configuration. So please keep in mind that these are not mil-spec ratings but should be within 2 or 3dB of the mil-spec values. Here's a summary of the 4 baffle configurations. Values are averages.
Config 1
.223 Rem AR 18" barrel: 144dB
.223 Bolt gun 20" Barrel: 129dB
.223 Bolt gun 24: barrel: 128dB
6x47Lapua Bolt gun 28" barrel: 128dB, For reference my Thunderbeast 30P-1 metered at 130dB and the sound was very comparable to my friend's ultra 9. I didn't meter the ultra 9 because I couldn't put it on any of these host guns for direct comparison.

Config 2
.223 AR 18" Barrel: 143dB
.223 Bolt gun 24" barrel: 126dB

Config 3
.223 AR 18" Barrel: 144dB
.223 Bolt gun 24" barrel: 125dB

Config 4
.223 AR 18" Barrel: 144dB
.223 Bolt gun 24" barrel: 127dB

It appears that the meter was registering something in the action, probably the bolt slamming. Mil spec testing may actually produce significantly lower values due to the fact that the meter will be place further away from the cycling of the bolt carrier.
View Quote
Thanks.  If you were measuring 6" out from the shooter's right ear with the AR, then your numbers are similar to other designs that generate significant back pressure and generate good numbers at the muzzle.  Nothing wrong with that, it's up to the buyer to decide how it fits their needs.

I'm most curious about what your "ugly" configuration can produce at the ear--it seems like you would be giving the gas somewhere to go so back pressure should be better...?
Link Posted: 3/3/2019 11:31:58 PM EDT
[#43]
Just a clarification on the reported test data. Each configuration is a different design, primarily different baffle designs in the same outer body to determine which baffles work better. The different baffle designs handle gas flow in completely different ways. The variability in the data is more the differences in designs and platforms. The reported dBs are averages of five readings and most had an extreme spread of ~3dB or less for each set.

I will be releasing more Ugly data in upcoming weeks, if the torrential rain ever stops long enough to get set up for mil-spec metering. The Ugly design is tailored more for applications that make other attributes higher priority than ultimate sound reduction. The shortened length and shifted center of gravity can be more important to those that may be clearing buildings, holding the weapon up for long periods of time, want lower operating temps, etc. So the Ugly design does reduce sound but admittedly it doesn't reduce sound as much as someone like Thunderbeast or other reputable brand. It does give other benefits for certain users however. I use the Ugly 338 every time I take the .338 to the range because it works very well (check some of Ray's Thunderbeast 338 videos for reference) and doesn't protrude 11"+ from the already long barrel. And that gun is unbearable to be around without one.

https://www.youtube.com/watch?v=BkL25aG2sbI&feature=youtu.be

Ugly 338 Side view slow motion
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