Search found 34 matches

by Stan1
Tue Jan 22, 2019 11:46 pm
Forum: Silencer Talk
Topic: 9mm rifle subsonic load data?
Replies: 7
Views: 1788

Re: 9mm rifle subsonic load data?

Good point ECCO, I forgot to post the velocity. My notes show:

-- Rainier 147, 3.7 CFE Pistol, 1.135 OAL, was 960 FPS.

-- Same everything except 3.8 CFE Pistol and 1.100 OAL was 1,012 FPS.
by Stan1
Sun Jan 20, 2019 11:32 pm
Forum: Silencer Talk
Topic: 9mm rifle subsonic load data?
Replies: 7
Views: 1788

Re: 9mm rifle subsonic load data?

Shooting my Ti-Rant 9 on a PC9 takedown I got 121.8 dBA with a 147 TC and 3.7 CFE Pistol. Not to say that's the perfect load; actually it's one of the first I've tried. This load/rifle metered 149.1 unsuppressed. At my right ear it metered 139.1. Yep, sounds a lot like a blowback 9mm. So while it su...
by Stan1
Mon Oct 22, 2018 7:36 am
Forum: Silencer Reviews
Topic: Switch Back .22 Silencerco
Replies: 16
Views: 6887

Re: Switch Back .22 Silencerco

Stan, Impressive engineering! Cross publishing is how information is propagated. Here is a thread on NFAtalk with some of my Pressure Trace II experiments. The data start at post 32 (had to order the equipment, etc.). The first graph I posted was an FRP image. I'm still learning how to make best us...
by Stan1
Sat Oct 20, 2018 11:56 pm
Forum: Silencer Reviews
Topic: Switch Back .22 Silencerco
Replies: 16
Views: 6887

Re: Switch Back .22 Silencerco

What have you found? Is it OK to link to other sites from here? I ask because I've posted some info elsewhere and, i hope this doesn't come off wrong, I don't want to have to maintain the same data in multiple locations :mrgreen: Basically I have a Pressure Trace II that I have used to test the unc...
by Stan1
Fri Oct 19, 2018 10:38 pm
Forum: Silencer Reviews
Topic: Switch Back .22 Silencerco
Replies: 16
Views: 6887

Re: Switch Back .22 Silencerco

I can see where playing with the stack on a rifle length barrel could change things. I've used a strain gauge to record the uncorking pressures on 4" .22 pistols and 16"-19" .22 rifles, and with a rifle there just isn't much pressure to work with.

Good on 'em for playing around and moving the peg.
by Stan1
Fri Aug 31, 2018 8:13 pm
Forum: Silencersmithing Forum
Topic: action noise and suppressor hosts
Replies: 48
Views: 4509

Re: action noise and suppressor hosts

I'll change my vote from bolt or falling block to a more generic locked breech and manual action of some type. Long barrels vs. short. And wipes. Wipes and ablatives are good :mrgreen: Enough wipes change the sound from a muffled bang or phew to "click". People who are very experienced with all type...
by Stan1
Fri Aug 31, 2018 2:37 pm
Forum: Silencersmithing Forum
Topic: action noise and suppressor hosts
Replies: 48
Views: 4509

Re: action noise and suppressor hosts

Agreed on strikers being quiet and 10/22s being really noisy. I've metered my Welrod on an empty case at 89.7 (87.3-90.5), and my 10/22 bolt drop feeding a CCI Std Vel at 116.8 (114.0-120.3). Compare the bolt drop to a 19" pump action .22 firing CCI Std Vel with a Regulator at 118.0 (116.0-119.0). S...
by Stan1
Fri Aug 24, 2018 9:46 pm
Forum: Silencer Reviews
Topic: Rugged Oculus vs Dead Air Mask (Metered)
Replies: 15
Views: 12303

Re: Rugged Oculus vs Dead Air Mask (Metered)

Deserteaglexxx wrote:I use C weighting as Dr. Dater recommends.
C weighting for reality, A weighting for Mil Spec and marketing comparisons. I think you pretty much have to quote A numbers or long threads ensure :D
by Stan1
Tue Mar 27, 2018 12:44 am
Forum: Silencersmithing Forum
Topic: Can't belive I just bought a Welrod !
Replies: 20
Views: 5509

Re: Can't belive I just bought a Welrod !

I was interested in the bolt action design of the Welrod, and found a very thorough document here: https://edoc.site/the-welrod-suppressor-pdf-free.html That's a download of Anders Thygesen's site http://timelapse.dk. I'd go straight to the site and skip the ads :-) Anders has done a great job of c...
by Stan1
Mon Mar 26, 2018 11:21 pm
Forum: Silencersmithing Forum
Topic: Can't belive I just bought a Welrod !
Replies: 20
Views: 5509

Re: Can't belive I just bought a Welrod !

Historian, being bit of a Station IX fan that Leo Marks interview was fascinating to me. I have to read the book now. Thanks for your usual clever insights.
by Stan1
Mon Sep 19, 2016 7:16 pm
Forum: Silencersmithing Forum
Topic: Machining a Barrel and End Cap
Replies: 3
Views: 746

Re: Machining a Barrel and End Cap

Historian wrote:Blown away by the talent of a youngster in the South
who demonstrated turning a part by hand.

Compelled to share his talent with a technique for machining some
non-linear parts.

<< https://www.youtube.com/watch?v=BDtrDv6uZTs >>
That's really cool. Never tried that. Thanks for sharing.
by Stan1
Tue Sep 06, 2016 10:05 am
Forum: Silencersmithing Forum
Topic: Back to Past: Shaper
Replies: 4
Views: 1126

Re: Back to Past: Shaper

Yeah, a beautiful piece. I remember reading as a kid about some gun writer touring the Winchester plant and seeing model 70s quietly being created by rows of shapers. Probably why they were too expensive to make that way... Point is, I love how quiet they are. Mostly a hum and a ZZZZZ noise.
by Stan1
Sun Sep 04, 2016 4:48 pm
Forum: Silencersmithing Forum
Topic: Back to Past: Shaper
Replies: 4
Views: 1126

Re: Back to Past: Shaper

In my dream shop I will have a shaper. Coolest tool possible.
by Stan1
Fri Apr 01, 2016 12:49 am
Forum: Silencersmithing Forum
Topic: Single point threading titanium tube
Replies: 57
Views: 20617

Re: Single point threading titanium tube

I imagine everyone does this, but the way I cut threads up to a shoulder or into a blind hole is to set up a stationary dial indicator in a magnetic mount so the point will touch the carriage, and set it so it has 4-5 full rotations until the end of the cut, with the needle ending up straight up at ...
by Stan1
Thu Mar 31, 2016 11:56 pm
Forum: Silencersmithing Forum
Topic: Single point threading titanium tube
Replies: 57
Views: 20617

Re: Single point threading titanium tube

propeine wrote:I can't/ won't trust myself to watch the thread dial and hit the half nuts when running at normal speeds. I've tried. It's scary lol
I tend to tap my foot to the dial rotation like I'm keeping time with the (non existent) music. Works every time.
by Stan1
Sat May 03, 2014 7:43 am
Forum: Silencersmithing Forum
Topic: My first milling machine!
Replies: 44
Views: 4673

Re: My first milling machine!

I bought a Jet R8 chuck and collet set that has been nice, but I wasted money on the full set. It must be close to 20 years old and there are collets I still haven't used. That said it is nice being able to change end mill sizes w/o having to mess with the drawbar. http://www.jettools.com/us/en/p/cc...
by Stan1
Mon Mar 24, 2014 6:50 pm
Forum: Silencersmithing Forum
Topic: selfish request... need brain power
Replies: 10
Views: 1079

Re: selfish request... need brain power

Electrical noise? See if you lost a ground wire connection to the shielding on the control or power cables. The shield grounds are only connected on one end, right? I'm guessing a broken ground since it was working for a long time. Please post the resolution. Thanks Fwiw I have a couple of the Hitac...
by Stan1
Sun Dec 08, 2013 9:26 pm
Forum: Silencer Talk
Topic: fastest way to buy a can NOW???
Replies: 29
Views: 2134

Re: fastest way to buy a can NOW???

I'm pretty sure any dealer can eFile. All he has to do is sign up on the ATF site. I'm not sure why anyone wouldn't use the electronic system for many reasons.
by Stan1
Fri Oct 18, 2013 7:23 am
Forum: Silencer Reviews
Topic: Sparrow SS arrives - Huzzah
Replies: 19
Views: 4581

Re: Sparrow SS arrives - Huzzah

My options are to run a quality 1/2" x 28 tap through the sparrow to clean it up/loosen it a bit, or use an adjustable die on the barrels to remove a tiny bit more metal Best rule of thumb - Always cut on the cheapest part. Corollary - Don't cut on the part with a warranty. Especially if it takes a...
by Stan1
Tue Sep 24, 2013 7:05 am
Forum: News Stories
Topic: Obama memorializes Navy Yard victims by calling for transfor
Replies: 4
Views: 157

Re: Obama memorializes Navy Yard victims by calling for tran

Hush wrote:Obama memorializes Navy Yard victims by calling for transformation in firearms laws
So he's going to allow guns on military bases now? Excellent.
by Stan1
Wed Sep 18, 2013 10:37 am
Forum: News Stories
Topic: Media obsessed with linking AR-15 with Navy Yard shooter
Replies: 3
Views: 166

Re: Media obsessed with linking AR-15 with Navy Yard shooter

It sounds like an AR-15 pattern rifle or two ended the problem, not contributed.
by Stan1
Wed Sep 18, 2013 10:34 am
Forum: Silencersmithing Forum
Topic: Inconel or Stellite home build possible?
Replies: 6
Views: 1604

Re: Inconel or Stellite home build possible?

Everyone may already know this, but in any case Stellite is the material often used to make automotive exhaust valve seats. I used to work in an automotive machine shop rebuilding heads and I can tell you Stellite is tough stuff.
by Stan1
Mon Sep 16, 2013 10:50 pm
Forum: Legal and Political
Topic: NFA Trust & tax Stamp readily available??
Replies: 34
Views: 3020

Re: NFA Trust & tax Stamp readily available??

When I was a kid I used to fly sailplanes, "gliders" to the uninitiated. I vividly recall a passage from the flight instruction manual. "Unpowered aircraft have the right of way over powered aircraft, but don't insist upon it. It does no good to know you were right in the grave." I like my freedoms ...
by Stan1
Sun Sep 15, 2013 9:02 am
Forum: Silencersmithing Forum
Topic: Historian's Resource Page
Replies: 99
Views: 18422

Re: Historian's Tool page.

Aircraft Spruce - All kinds of hard to find materials. Example - really good quality stainless tubing for AR gas tubes.
http://www.aircraftspruce.com

Toolmex - Machine tools and tooling, assorted big boy toys
https://www.toolmex.com

MSC and ENCO have way too much of my money.
by Stan1
Mon Sep 09, 2013 8:44 pm
Forum: Silencer Talk
Topic: Interesting Seizure
Replies: 27
Views: 2593

Re: Interesting Seizure

Took a second look. You know, I think I see the light now. When I thread a barrel I use an indicator rod and a couple of Starrett dial indicators. I'm a dumbass. All I had to do was screw a pipe fitting on over some electrical tape and ask AAC to send a can with a 3/4 pipe thread fitting instead of ...