.338 Magnum can build .... video added

Yes, it can be legal to make a silencer. For everything Form-1, from silencer designs that are easily made, to filing forms with the BATF, to 3D modeling. Remember, you must have an approved BATF Form-1 to make a silencer. All NFA laws apply.

Moderators: mpallett, bakerjw

Post Reply
mscott
Silent Operator
Posts: 61
Joined: Sat Feb 28, 2009 10:09 pm

.338 Magnum can build .... video added

Post by mscott » Sun Sep 18, 2011 8:38 pm

Here goes. I figured for my first form 1 I might as well go for the gusto, so I build a can for my 7mmRM precision rifle. I haven't got it completely done yet, but figured I'd get a thread going. I can't do any of the fancy CAD drawings, so pics will have to do. I kinda had a plan, but really just ordered material and started cutting. I bought my lathe back in January and have learned to use it over this year, so feel free to comment on whatever. You aren't going to hurt my feelings. I ordered 1.75 OD 316 tubing with a .120 wall. It's obviously plenty heavy, but the plan is to turn it down in steps. I'll leave it .100 thick over the blast chamber, .090 in the middle, and .080 toward the end. Any thoughts on how much lighter I could go? End caps are threaded 1 9/16-20. I wanted it to work on the biggest rifle I'll likely ever own, so I made it for up to a .338 Lapua. End caps and baffles are 303 stainless and it's a direct thread 5/8-24 mount. The bore for baffles and end cap is .400 and it sounds very good on both my 7mmRM and AR15. There are 5 stepped cone baffles with a 3.5" blast chamber. Spacers are .049 stainless tubing. I'll get some more pics of all the internals laid out and the baffles as they are finished. I actually added more steps to what you see here.

my parts as received
Image

threading tubing
Image

baffles
Image
Image

test fit
Image
Image
Last edited by mscott on Sat Oct 08, 2011 9:50 pm, edited 1 time in total.

User avatar
ghostdog662
Silent But Deadly
Posts: 655
Joined: Thu Mar 06, 2008 5:19 pm
Location: TX

Re: .338 Magnum can build

Post by ghostdog662 » Sun Sep 18, 2011 9:29 pm

Looks great to me. How does she sound?
LP

mscott
Silent Operator
Posts: 61
Joined: Sat Feb 28, 2009 10:09 pm

Re: .338 Magnum can build

Post by mscott » Mon Sep 19, 2011 7:36 am

Test fired on both rifles pictured and it sounds very nice. Certainly no ear plugs required. I'll get it finished up and marked this week for a match this weekend and get some other opinions.

mscott
Silent Operator
Posts: 61
Joined: Sat Feb 28, 2009 10:09 pm

Re: .338 Magnum can build

Post by mscott » Thu Sep 29, 2011 9:29 pm

Alright, time for an update. We shot last weekend at a match and I was alongside a Sandstorm, Shark Jaws, and an AAC 762 SD. Mine sounded just as good as the rest of them. We put the Jaws on my rifle, fired a couple rounds, and then switched back to my can to fire a few. Nobody could say which one was any quieter than the other. I'm pretty happy with it. I ended up using BBQ grill paint for a coating. It will have a TAB gear cover shortly anyway.

here are the pieces 42.5 oz.
Image

stacked up
Image

end cap tool
Image

User avatar
delta9mda
Silent But Deadly
Posts: 2304
Joined: Wed Dec 07, 2005 4:32 pm
Location: miami, florida

Re: .338 Magnum can build

Post by delta9mda » Thu Sep 29, 2011 10:47 pm

very well done.
NP

User avatar
Wicked
Silent But Deadly
Posts: 1438
Joined: Fri Feb 20, 2009 3:15 am
Location: Dayton, OH
Contact:

Re: .338 Magnum can build

Post by Wicked » Fri Sep 30, 2011 1:03 am

How did I missed this one ......? Very nice!
https://www.facebook.com/wickedweapons

mscott
Silent Operator
Posts: 61
Joined: Sat Feb 28, 2009 10:09 pm

Re: .338 Magnum can build

Post by mscott » Sat Oct 01, 2011 11:24 am

Thanks for the compliments. Couldn't have done it without the members on this forum sharing info. Here's a pic on my newly assembled .260. It sounds great.

Image

User avatar
jimmym40a2
Elite Member
Posts: 2745
Joined: Sun May 06, 2007 9:25 pm
Location: Colorado (for Mongo)

Re: .338 Magnum can build

Post by jimmym40a2 » Sat Oct 01, 2011 10:06 pm

Nice!
http://www.youtube.com/watch?v=nEZJ_C4LwzA

User avatar
SilentMike
Silent But Deadly
Posts: 597
Joined: Mon May 02, 2005 12:57 pm
Location: Alpharetta, GA

Re: .338 Magnum can build

Post by SilentMike » Sat Oct 01, 2011 10:21 pm

Nice work! You grabbed the tiger by the tail for your first form 1. Most folks start with a .22.

Since your first can was a .338, what will you do for an encore?
Mike Smith
Advanced Armament Corp.
770-925-9988

mscott
Silent Operator
Posts: 61
Joined: Sat Feb 28, 2009 10:09 pm

Re: .338 Magnum can build

Post by mscott » Sun Oct 02, 2011 5:31 am

SilentMike wrote:Nice work! You grabbed the tiger by the tail for your first form 1. Most folks start with a .22.

Since your first can was a .338, what will you do for an encore?
Thanks. Next one will be something lighter :lol:

I submitted 2 form 1s at the same time, so the other one is laying here. It will be a 6" long, 1 5/8" dia can for my .40s&w carbine, .22 rifles and likely built stout enough for the AR15s.

Historian
Silent But Deadly
Posts: 3200
Joined: Mon Mar 29, 2010 11:37 pm

Re: .338 Magnum can build

Post by Historian » Sun Oct 02, 2011 9:23 am

You are very talented. I, among many here, are 'shiny' with envy
of your great result. Instructive photos.

Out of curiosity, what is your lathe, a South Bend?

If you ever meter we would like to hear.

Super!

mscott
Silent Operator
Posts: 61
Joined: Sat Feb 28, 2009 10:09 pm

Re: .338 Magnum can build

Post by mscott » Sun Oct 02, 2011 6:58 pm

It's an old South Bend Heavy 10 with a 1 3/8" spindle bore. I'm pretty happy with it. I'm hoping to make a video next weekend with mine, a Shark Jaws, and whatever else is there.

User avatar
JJC
New Member
Posts: 2
Joined: Fri Sep 30, 2011 1:52 pm

Re: .338 Magnum can build

Post by JJC » Mon Oct 03, 2011 10:48 am

Looks like some great work, I'm hoping to start a build for a new .338 LM soon.
People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf

johnnylawn
Member
Posts: 25
Joined: Tue Mar 15, 2011 7:17 pm

Re: .338 Magnum can build

Post by johnnylawn » Mon Oct 03, 2011 2:35 pm

What tool are you using to create the steps on the cones? It looks like a parting tool?

mscott
Silent Operator
Posts: 61
Joined: Sat Feb 28, 2009 10:09 pm

Re: .338 Magnum can build

Post by mscott » Mon Oct 03, 2011 5:29 pm

johnnylawn wrote:What tool are you using to create the steps on the cones? It looks like a parting tool?
I'm using a bit with replaceable carbide inserts. That pic was taken just before I parted the baffle from the piece of stock material.

mscott
Silent Operator
Posts: 61
Joined: Sat Feb 28, 2009 10:09 pm

Re: .338 Magnum can build .... video added

Post by mscott » Sat Oct 08, 2011 9:52 pm

Here's a video of my can being fired alongside a Shark Jaws. Both rifles are .260s using the same ammo.
http://www.youtube.com/watch?v=ZtHUSuVn ... r_embedded


Hmmmm .... which one is homemade and which one retails for $2,000?

User avatar
JacksonBrowne
Silent But Deadly
Posts: 813
Joined: Sun Sep 02, 2007 10:30 am
Location: Lubbock, TX

Re: .338 Magnum can build .... video added

Post by JacksonBrowne » Sun Oct 09, 2011 4:27 pm

Excellent.
07/02 SOT

Post Reply