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Old 12-09-2014, 04:19 PM   #1
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Default Griffin Rev 9 baffles

I am curious why the performance of the Rev 9 seems to be better than the octane 9 on the initial silencer shop demonstration.

The designs seem similar at first but there are a few differences I have noticed but I am unsure how important they are.
1. There is 1 more baffle
2. The baffle holes are squared off

Any other thoughts?
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Old 12-09-2014, 04:24 PM   #2
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Quote:
Originally Posted by owensww View Post
I am curious why the performance of the Rev 9 seems to be better than the octane 9 on the initial silencer shop demonstration.

The designs seem similar at first but there are a few differences I have noticed but I am unsure how important they are.
1. There is 1 more baffle
2. The baffle holes are squared off

Any other thoughts?
All it takes is the difference in the spacer being .01" and that can change EVERYTHING!
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Old 12-09-2014, 05:03 PM   #3
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Huh

That must be maddening for the designers .
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Old 12-09-2014, 05:22 PM   #4
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Huh

That must be maddening for the designers .
We had a design drop 2dB by adding a 30 degree slope to .015" of a baffle surface!

All part of being a manufacturer.
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Old 12-09-2014, 06:19 PM   #5
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so do you use computer simulations or trial and error?
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Old 12-09-2014, 06:27 PM   #6
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so do you use computer simulations or trial and error?
Trial and error....computer simulations are not accurate when it comes to silencers.
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Old 12-09-2014, 07:43 PM   #7
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Cool, I have some geeky love for hearing snippets of insider talk on silencer R&D.

As a silencer owner and innerwebz expert, I might add that it seems to me that 2-5 dB variance can occur on different days, ammo, firearm, & environ conditions. So it can be tricky getting too gooey over single test results.
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Old 12-11-2014, 05:01 AM   #8
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There isn't nearly as much similarity between the baffles as there appears to be at a passing glance. If you put the two parts in an engineer's hands, they are completely different parts.

As for the 2-3DB on different days, I haven't really experienced that. I think a lot of the misconceptions about silencers stem from BS lines that suppressor sales people push.

I've never told people that tone and frequency are more important than SPL. Many other manufacturers have.

I've never told people performance swings from day to day. Many others have. I've generally found products to very consistently meter from one day to the next.

Maybe some of that variable is caused by people with meters that drift, and who don't calibrate their meters- or by people who don't set up their meter exactly 90 degrees to the muzzle, or who vary the distance from the meter to the muzzle. If you do everything consistently you will get very consistent results.
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Old 03-16-2015, 04:41 PM   #9
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Default recoil booster piston assembly

Does significant enough gas escape from the recoil booster piston assembly to explain the increase of SPL at the ear evident in the data on this site on 9mm silencers? Or is it all action related?
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Old 03-16-2015, 06:15 PM   #10
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Cv% is the best indicator of reproducibility IMHO


For example take out test of the M4SDII
At 1 M
CV%=0.37.........that's very low in case you don't know.
The 2 SD range on this can was 141.27-143.42.
Even a 3SD would allow for a 1.6 db difference.

It was Very repeatable.
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Old 04-27-2015, 07:05 AM   #11
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Quote:
Originally Posted by owensww View Post
Does significant enough gas escape from the recoil booster piston assembly to explain the increase of SPL at the ear evident in the data on this site on 9mm silencers? Or is it all action related?
Gas doesn't escape (Or at least not significant amounts) from the booster piston assembly with O-ring designs. The increase in noise if present is ejection port noise.
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