Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels & Ballistics

Rifles, Bullets, Barrels & Ballistics Applied Ballistics


Reply

338 snipe-tac project (338-408imp)

 
LinkBack Thread Tools Display Modes
  #1  
Old 12-11-2005, 10:31 PM
Gold Member
 
Join Date: Sep 2003
Location: Nebraska
Posts: 811
338 snipe-tac project (338-408imp)

Well its coming down to selecting a stock for the new long ranger. 338 snipe-tac (408c-t case necked to 338, 35 deg shoulder.) I call it the "338 Sniper~Tactical"
I designed a new action just for this project, 17-4 stainles, 1.600 dia, 1 1/8x16 threads, tennon 1 1/4" long to support the 35" Barney Lawton barrel. The bolt has three locking lugs, 30deg angle, hand lapped to 100% contact. I put in a Titanium firing pin and an aluminum bolt shroud. The barreled action weighs in at 11pounds 12ounces. The recoil lug is 3/8" thick hardened steel. It will have a IOR 6-24x50 35mm tube scope, on top of a 40moa picatinny rail base. The total weight with scope will be under 16#.
I had the chamber reamer made special for the 300MK bullet by Dave Manson. The bbl also has a special twist rate of 1x11.25" supose to stabilize the 300gr bullet at speeds around 3300fps.

I will post more pics when the project is done, and some targets. The cartrige in the pic has a 200gr nosler balistic tip, pretty bullet [img]/ubbthreads/images/graemlins/grin.gif[/img]



__________________
www.cowboy-dave.com

"Let the good times roll"
Reply With Quote
  #2  
Old 12-12-2005, 06:28 AM
Sponsor
 
Join Date: Jun 2007
Location: North Idaho
Posts: 1,841
Re: 338 snipe-tac project (338-408imp)

That must only leave you about 2 lbs or so for a stock? Hope it makes weight. In Idaho we have to be under 16.0 lbs to hunt with. It is an interesting project, I have a customer that wants me to build a heavy bench rifle in this caliber. What about a break? Keep us posted
__________________
Shawn Carlock

www.defensiveedge.net
1-208-687-2659
Reply With Quote
  #3  
Old 12-12-2005, 09:28 AM
Gold Member
 
Join Date: Sep 2003
Location: Nebraska
Posts: 811
Re: 338 snipe-tac project (338-408imp)

Shawn

Yes it will be just under 16# so its legal in the states with the weight law. The muzzel brake will be titanium, (what flavor i haven't decided). It also has a muzzel-thread protector for using it without the brake. (shown in the pic)
The picatinny rail will be Titanium also, all small parts are Ti or 7075 aluminum. Originally the reciever was going to be Titanium, but had to use the piece for another project, that would of shaved off another 2#.
The stock is Carbon fiber-Kevlar construction, light and strong.
__________________
www.cowboy-dave.com

"Let the good times roll"
Reply With Quote
  #4  
Old 12-12-2005, 09:35 AM
Platinum Member
 
Join Date: Jul 2003
Location: Central PA
Posts: 1,308
Re: 338 snipe-tac project (338-408imp)

16lb 338-408 with 300's at 3300fps+ NO THANKS! OUCH [img]/ubbthreads/images/graemlins/shocked.gif[/img]

Ought to get there in a hurry though [img]/ubbthreads/images/graemlins/grin.gif[/img]

nice action...why 3-lug? You make it?

JB
__________________
Check it Out!!--> Shoot the Smack The Smiley Match...and help AmericanSnipers.org
Reply With Quote
  #5  
Old 12-12-2005, 10:39 AM
Gold Member
 
Join Date: Sep 2003
Location: Nebraska
Posts: 811
Re: 338 snipe-tac project (338-408imp)

JB

Yea its my action. When its locked up the bolt cant move up or down,or side to side, all three lugs are set back into a 30deg matching angle locking abutment. The bolt is cut to a very close tolerance .0015 - .002 clearance. bolt dia is .900

I built one several years ago for a friend, the 200gn nosler, no recoil...250MK light to moderate recoil...300MK tollerable recoil, dont recomend mega bench shooting with out the brake. With the brake, its a dream to shoot. [img]/ubbthreads/images/graemlins/wink.gif[/img]
__________________
www.cowboy-dave.com

"Let the good times roll"
Reply With Quote
  #6  
Old 12-12-2005, 10:49 AM
Official LRH Sponsor
 
Join Date: Jun 2004
Location: Fort Shaw, Montana
Posts: 6,831
Re: 338 snipe-tac project (338-408imp)

BD408,

Looks like a hell of a rifle. One question. Why did they stop the fluting so far up the barrel. I would think that with the size of those flutes that if they brought them back to the start of the contour increase that you could drop a significant amount of weight. Also extend them a bit forward toward the muzzle as well.

Just curious, as to the reasoning. Is it because of the high pressure of the round at the breech end that they started the flutes so far down the barrel?

Been nice talking with you about these monsters as well.

Have a good day,

Kirby Allen(50)
__________________
Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

allenmagnum@gmail.com
Reply With Quote
  #7  
Old 12-12-2005, 11:56 AM
Gold Member
 
Join Date: Sep 2003
Location: Nebraska
Posts: 811
Re: 338 snipe-tac project (338-408imp)

Fifty

There was no rhyme or reason, that is just what specs i wanted. I left it short at the muzzel, i wasn't sure if i was going to keep it at 35" or shorten it(32" for powder burn) I have extra room at the breech end to set it back also. I thought about extending the flutes closer to the breech, maybe it would of got to busy. Weight wasnt a factor when i ordered the bbl.

Nice chattin with you also!
__________________
www.cowboy-dave.com

"Let the good times roll"
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: 338 snipe-tac project (338-408imp)
Thread Thread Starter Forum Replies Last Post
338 snipe-tac shaner2121 Rifles, Bullets, Barrels & Ballistics 66 01-02-2011 01:43 PM
338 snipe-tac Posey Guns For Sale 5 05-12-2009 02:49 PM
338 Snipe-Tac Just Learnin Gun Photos 14 01-07-2009 11:16 AM
338 snipe-tac jdg300rum Equipment Discussions 15 09-14-2007 06:31 PM
338 AM vs 338 Snipe Tac bjlooper Rifles, Bullets, Barrels & Ballistics 3 05-07-2006 10:37 AM


All times are GMT -5. The time now is 09:39 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC