Actual dB measurement of my De Lisle replica.

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Richard/SIA
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Actual dB measurement of my De Lisle replica.

Post by Richard/SIA » Thu Jul 24, 2014 4:40 pm

Finally got one of my De Lisle's measured for dB using a proper meter per the accepted standards.
Insert the usual disclaimer about elevation, humidity, variations in bullet design and load, etc., all affecting performance so no guarantee that another unit will perform identically on any other day.

128.44dB 1 meter to the left, 10 shots
111.40dB 1 meter to the left, firing pin (empty chamber)
125.28dB measured at the ear, firing pin (empty chamber)

Equipment:
B&K 2209 meter
B&K type 4136 ¼” microphone
B&K type 4220 pistonphone
Federal American Eagle 230 grain

Atmospheric conditions:
85 degrees
63% humidity
29.330 in actual pressure at test site

Following the standards & procedures as outlined in Paulson, Alan C., Silencer History and Performance, Volume 1 chapter 5

1.0 meter to the left of muzzle 90 deg to the bore axis
1.6 meters above non-reflective surface
No reflecting surfaces near by
10 rounds are fired & averaged to determine performance

Now I'm headed back to the shop to assemble some more. :D
I would like to tighten the baffle aperture but with so many individual baffles it's as tight as I dare go without getting strikes.
Still want to do a mono-core when I can, that should let me tighten the baffle bore significantly.
Also easier to assemble with fewer parts, but more time consuming to machine.
At these prices I want my gas 100 octane, leaded, and my windshield washed!

GHEN
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Joined: Fri Apr 28, 2006 2:45 pm

Re: Actual dB measurement of my De Lisle replica.

Post by GHEN » Wed Jul 30, 2014 1:14 pm

This sounds (get it) pretty exciting.

Can't wait to get more information about this.

GHEN

Rob1928
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Re: Actual dB measurement of my De Lisle replica.

Post by Rob1928 » Sat Aug 02, 2014 9:36 pm

I've got one of Richards DeLisles and love it. It is silly quiet and everyone who shoots it smiles and is amazed.

My only caution is to clean it often or you won't get the baffles out. In hind sight (I knew better too) I should have opted for the two stamp version. My own fault.

I'd thought about getting a 77/44 for about the same price but this has style and class in spades and the workmanship is top notch. It goes to the range on almost every trip regardless of what else I'm shooting.

Global Armory
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Re: Actual dB measurement of my De Lisle replica.

Post by Global Armory » Sat Sep 13, 2014 12:23 am

What no gun porn!?!?!

dark2023
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Location: North Carolina

Re: Actual dB measurement of my De Lisle replica.

Post by dark2023 » Sat Sep 13, 2014 1:18 pm

What no gun porn!?!?!
I agree, pics or it didnt happen. :wink:
A gun is meant to protect your life, not your wallet. Things can be replaced, people cant.

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Artful
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Re: Actual dB measurement of my De Lisle replica.

Post by Artful » Sun Sep 14, 2014 1:33 am

excellent numbers - and you think the monocore will lower that even more - how low can you go :lol:
"Trying to tax yourself into prosperity is like standing in a bucket and trying to pick yourself up by the handle." - Winston Churchill

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Richard/SIA
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Location: Nevada

Re: Actual dB measurement of my De Lisle replica.

Post by Richard/SIA » Sun Sep 14, 2014 1:55 am

Artful wrote:excellent numbers - and you think the monocore will lower that even more - how low can you go :lol:
125.28dB measured at the ear, firing pin (empty chamber)?

Some people already swear all they hear is the firing pin, I think there is just a little report.
Several of these out in the world now, surprised to see so little posted from the owners.

Probably easiest to take apart while warm.
As I recall De Lisle himself recommended cleaning after 500 rounds or less.
Clean burning ammo is your friend.
A baffle alignment/removal tool is included with each integral unit.

Getting low on the traditional baffles, so the mono-core may be moving up in priority.

A quick description of the recent GBR-IX event with a customers De Lisle pic and short videos of other items.
http://smallestminority.blogspot.com/20 ... e-day.html
At these prices I want my gas 100 octane, leaded, and my windshield washed!

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