Suppressors Thunder Beast 338 Gen 2 and Magnus on 6.5 CM

TBACRAY

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Feb 14, 2017
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Here we have the Magnus, Gen 2 338 Ultra ,Ultra 9 in 6.5 , PR30L and the Nomad LT on a 24" 6.5 CM shooting 140 ELD Match ammo on the Pulse




Otter Creel PR30L
MR-130.2,130.3,130.2,130.5,131.8 Avg-130.1
ML-131.7,129.8,128.6,130.5,130.0 Avg-130.6
MR/ML Avg- 130.3
SE-118.1,117.9,117.1,116.3,119.7 Avg-117.8

Nomad LT
MR-131.4,129.8,128.1,128.7,128.7 Avg-129.1
ML-129.4,130.2,127.9,130.1,127.9 Avg-129.4
MR/ML Avg 129.3
SE-121.1,116.7,115.2,114.5,116.5 Avg-116.8

Ultra 9 6.5 Gen2
MR-131.6,129.2,129.5,129.0,130.1 Avg-129.9
ML-132.5,130.1,131.0,131.6,133.2 Avg-131.7
MR/ML Avg-130.8
SE-115.9,118.1,116.0,116.9,116.6 Avg-116.7

Magnus
MR-128.0,125.7,125.3,125.6,126.5 Avg-127.1
ML-128.3,125.7,125.7,126.6,128.9 Avg-126.2
MR/ML Avg- 126.6
SE-113.1,110.9,110.9,112.1,112.9 Avg-112

Gen 2 338 Ultra
MR-123.6,127.0,125.0,123.3,124.1 Avg-124.6
ML-126.5,125.2,122.4,122.9,126.0 Avg-124.6
MR/ML Avg- 124.6
SE-112.6,109.3,110.6,110.5,108.7 Avg-110.3
 
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Interested to see the 338 ultra Gen 2 numbers vs the 338 Ultra… that magnus has me 👀

When can we pre-order with y’all?
it’s 3 dB quieter on 338

 
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Could you clarify the abbreviations in the data? I'm guessing -
MR = muzzle right?
ML = muzzle left?
SE = shooters ear?

Is that right? Thanks in advance.
 
Ray, you are amazing with suppressors and the data is great. I just cannot decipher it. Can you use bigger crayons to tell me how one can did to the other?

We ran a poll on IG this week, and I asked what was the best precision rifle suppressor. 40% answered TBAC Ultra 7. The other 60% was spread across TBAC Ultra 9, Otter Creek PRS, Dead Air Nomad and Surefire RC2. A few outliers for Rex, CGS, OSS and Rugged

This was customer point of view, nothing scientific. No Silencerco, No EA, No YHM, No Gemtech.
 
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Here's the decoder ring:

Gen 2 338 Ultra
MR-123.6,127.0,125.0,123.3,124.1 Avg-124.6
ML-126.5,125.2,122.4,122.9,126.0 Avg-124.6
MR/ML Avg- 124.6
SE-112.6,109.3,110.6,110.5,108.7 Avg-110.3

We shot 5 shots. These are listed left to right for three different measurement positions. MR is milspec right (1 meter to right), ML is milspec left (1 meter left of suppressor muzzle). SE is Shooter's Ear.

MR-123.6,127.0,125.0,123.3,124.1 Avg-124.6
==
the shots, in sequence were 23.6 -- 127.0 -- 125.0 -- 123.3 -- 124.1
The average for the 5 shots in the milspec right (MR) position was 124.6

MR/ML Avg is just the average between the right and left. In this case the averages were identical. Sometimes the left/right is different, if metering outdoors (wind), or due to tiny misalignment, or on semi-autos (which may have more port noise on right hand side).

SE is the same sequence of shots, with the Average at the end.

Bottom line, look at what can it's for and then look for the "MR/ML Avg" and then "SE Avg" numbers. That's the muzzle and shooter's ear numbers for that can.
 
Bud at xsteel makes bullet catchers out of ar550. From the few glimpses I've seen in the videos, it looks like one with a sheet of mdf on it.
 
Yeah I've been thinking about that too. Give a quick barn look around in a video please.

And say what's up to Turbo!!!
The pulse is the only reason we have the confidence to test indoors and trust the data. We can estimate when reflections are going to show up in the data mathematically using the speed of the bullet and speed of sound. Assuming for easy math the bullet is traveling 3000ft/sec and speed of sound is 1000ft/sec: 90ft/(3000ft/sec)+90ft/(1000ft/sec) = 0.12 seconds (120 milliseconds) before the sound of the bullet hitting the trap shows up in the waveform. That's the time for the bullet to travel to the trap and the sound of the trap to travel back to the mics.

In our experience we've seen more issues with the walls being to close or ceilings too low and/or shooting over a concrete floor. We shot in an indoor range to see if it would work and the concrete floor and 8ft ceilings caused terrible reflections in the waveform. If your walls or ceilings are 15 ft away the time for sound to go there and back is 30ft/(1000ft/sec) = 30 milliseconds, which is barely sufficient. The peaks in our data typically occur 0-10 milliseconds after the shot depending on how loud the can is. In our current setup we see small reflections at ~60ms and ~90ms which is more than enough time to capture the data. We also went through several setups to verify we were identifying the reflections properly by moving where we were in the building and tracking the timing of the reflections.
 
Behind a little on video processing but here's the data for 300NM

338 Ultra Gen2:
.300 Norma Magnum
133.6 dB muzzle, 121.4 shooter's ear
26" AI-AXMC-LE, Berger 230

Magnus:

.300 Norma Magnum
135.1 dB muzzle, 122.1 shooter's ear
26" AI-AXMC-LE, Berger 230
Thank you. Do you happen to have the Gen 1 numbers handy for comparison?
 
I don't think we have 300NM data on the Gen1, but based on what we just got on the Gen2, the ear numbers were identical and the muzzle was within about 1.0 dB, so I would expect the same difference on 300NM Gen1 -> Gen2, as the 338LM.
I thought Ray had the Gen 2 as 3-3.5 dB quieter in 338? Also, is the 6.5 CM 10 dB quieter with the Gen 2?! I see 110.3 avg SE numbers from the YT video with the Gen 2 and 121.7 with the Gen 1 non-SR. Wow!
 
Was there any way to have a gen 1 338 ultra converted to a gen 2?
Not really. A full Gen2 Ultra depends on being tubeless. A Gen1 has a tube that we cannot get rid of. When we re-core Gen1 cans now,we use a Gen1-2 hybrid baffle that resembles a Gen2 but fits in the Gen1 tube, so its internal I.D. is smaller.
 
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