50 Beowulf subsonic project

saigatechusa · Post by **saigatechusa** » Mon Jun 17, 2013 3:37 pm

50 Beowulf AR upper

Stock recoil / buffer system

9.25" barrel

Full titanium suppressor

500g Hornady XTP 982fps

Cycles 100%

strobro32 · Post by **strobro32** » Mon Jun 17, 2013 5:54 pm

Toxarch · Post by **Toxarch** » Thu Jun 20, 2013 3:58 pm

Very nice! How "quiet" is it?

gunham · Post by **gunham** » Sun Jun 23, 2013 5:11 pm

Hey. What's the thread pattern for the silencer? And is there some kind of standard? I have been wanting to do something like that withe the Beowulf. Thanks.

Aussie contractor · Post by **Aussie contractor** » Tue Jun 25, 2013 6:24 am

Awesome, love to see a video of it in action.

saigatechusa · Post by **saigatechusa** » Tue Jun 25, 2013 10:10 am

More load and DB testing next weekend

Thanks!!

saigatechusa · Post by **saigatechusa** » Tue Jun 25, 2013 10:25 am

gunham wrote:Hey. What's the thread pattern for the silencer? And is there some kind of standard? I have been wanting to do something like that withe the Beowulf. Thanks.

Since I started with a bull barrel, I cut to length, turned the barrel for my custom gas block I picked a thread dia. that would give me the largest shoulder for the suppressor to locate on.

12" AA barrels are threaded 49/64" - 20 tpi The OD of the barrel is .775 and the thread OD is .7656 it only leaves less than a .010" shoulder.

wacki · Post by **wacki** » Tue Jun 25, 2013 12:08 pm

Name brand of bull barrel?

What kind of can is that? Looks like a titanium Octane 9 HD with vent holes.

saigatechusa · Post by **saigatechusa** » Tue Jun 25, 2013 12:42 pm

wacki wrote:Name brand of bull barrel?

What kind of can is that? Looks like a titanium Octane 9 HD with vent holes.

Stoner 18" I cut off just behind the existing gas port

Suppresser, my partner and I designed and built

Holes you see are for rosett welding the baffles

wacki · Post by **wacki** » Tue Jun 25, 2013 7:28 pm

How did you make the baffles? I can't tell if they were hydraulically pressed or CNC'd from a billet.

Either way nice job.

So the baffles welded together after you took that picture I take it? It's a non-serviceable sealed can?

Boosted98gsx · Post by **Boosted98gsx** » Tue Jun 25, 2013 8:14 pm

wacki wrote:How did you make the baffles? I can't tell if they were hydraulically pressed or CNC'd from a billet.

Either way nice job.

So the baffles welded together after you took that picture I take it? It's a non-serviceable sealed can?

They kind of look like they were spun with the concentric wrinking in the material.

Would really like to see a video of this!

saigatechusa · Post by **saigatechusa** » Wed Jun 26, 2013 11:04 am

wacki wrote:How did you make the baffles? I can't tell if they were hydraulically pressed or CNC'd from a billet.

Either way nice job.

So the baffles welded together after you took that picture I take it? It's a non-serviceable sealed can?

CNC milled from billet grade 5 17.01 per inch for bar stock

Tube grade 9

The finish is from a ball end mill.

I wish I could press but the baffle design would not be economical otherwise large companies like AAC would be doing it.
Yes its welded just as AAC welds their TI cans

It is a centerfire catridge and rarely needs cleaning if proper powders are used

I have seen several people using AA 5744 but this is a errosive powder that leaves powder granuals in the can and action

Most of my loads so far leave only a fine soot in the can

Still looking for reliable / accurate / subsonic formula

Casper · Post by **Casper** » Fri Jun 28, 2013 4:36 pm

That is fantastic! Great job and thanks for sharing!

saigatechusa · Post by **saigatechusa** » Tue Mar 25, 2014 12:29 pm

Just built a custom gas tube with flow adjustment

Now working on a cleaner load

RJT · Post by **RJT** » Tue Mar 25, 2014 12:43 pm

The adjustable tube looks sweet, great design!

saigatechusa · Post by **saigatechusa** » Tue Mar 25, 2014 1:40 pm

Thanks!!

New load most people seem to think is too low of pressure

16gr trailboss / 500gr XTP / 2.240 / drilled flash hole to .160

920 avg fts

cycles and locks bolt back with clean barrel

lubed bullets

very slight crimp

lightly oiled barrel

2.5 oz buffer

standard carbine spring

gas adjustment wide open

Also I can adjust gas tube and shoot Hot loads!!

saigatechusa · Post by **saigatechusa** » Mon Jun 23, 2014 12:42 pm

Testing at the range, my friend Karen shooting

both shots hypersonic

https://www.youtube.com/watch?v=5wn-uMQBYVc

hotbrass · Post by **hotbrass** » Mon Jun 23, 2014 2:50 pm

saigatechusa wrote:Testing at the range, my friend Karen shooting

both shots hypersonic

https://www.youtube.com/watch?v=5wn-uMQBYVc

Thanks for the video!

Looks like there is a big difference in recoil. Can is always a good way to go.

pshelto · Post by **pshelto** » Tue Jan 27, 2015 12:01 am

What was your blast chamber size and can diameter? I'm considering making a titanium one myself but since I don't have a machine shop (or many tools for that matter), I'm currently stuck with a D-cell maglite sized tube (1.5" diameter).

gunham · Post by **gunham** » Thu Jan 29, 2015 1:19 pm

That looks like it has a lot of recoil.

saigatechusa · Post by **saigatechusa** » Thu Feb 05, 2015 3:55 pm

Recoil can be Fun

https://www.youtube.com/watch?v=BJkAY_Y769g

12" Long / 1.75" Dia / 1.3/4" Blast chamber

pshelto · Post by **pshelto** » Tue Feb 10, 2015 9:25 am

That's a sweet setup. I have seen quite a few SBR Beowulfs and never understood why, but now that there's a can on the end, it all makes sense.

I'm going to build a can using a 1.5" diameter Ti tube from SDtac. Probably go with the 7.6" (8" overall) since I'll be mounting it to a 16" barrel.

Did you get a chance to check the drop in sound? From the video it seems quite a bit quieter. Hearing safe, would you say?

50 Beowulf subsonic project

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