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Barrel shank and threads (Read 12958 times)

westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12333 Location: Why, out West of course Joined: May 29^th, 2006	Barrel shank and threads Oct 11^th, 2013 at 1:57am	Print Post
	What you all think of this? Worked on a friends Ballard. This is what I found. Thread clearance is very very loose. Barrel didnt index up. Barrel shoulder is peened all the way around. I assume to make it index up tight. Be very careful who you have do your work. Joe.

	A blind squirrel runs into a tree every once in a while.
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BP Frequent Elocutionist Offline Posts: 8039 Location: Westside Joined: Aug 27^th, 2006	Re: Barrel shank and threads Reply #1 - Oct 11^th, 2013 at 3:24am	Print Post
	Joe, Just glad you discovered it before something ugly (*uglier*) happened.

	There are three kinds of men: The ones that learn by reading, the few who learn by observation, and the rest who have to pee on the electric fence and find out for themselves. Proud Noodlehead
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jhm Frequent Elocutionist Offline Posts: 2036 Location: georgia Joined: Sep 4^th, 2011	Re: Barrel shank and threads Reply #2 - Oct 11^th, 2013 at 5:21pm	Print Post
	I have looked at lots of threads on lots of barrels but this one takes the cake. I hope the receiver threads aren't damaged. If you want to save it about all you can do is cut it off and start again. This one is a real doozy. JHolland


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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12333 Location: Why, out West of course Joined: May 29^th, 2006	Re: Barrel shank and threads Reply #3 - Oct 12^th, 2013 at 11:03am	Print Post
	Yep, shody work. The barrel is a RKS gain twist ending at 11. All I did was throating. After sending pictures to the owner, reassembled it as is. If it were a leaded steel barrel or stressproof steel, something different would be done. Such as cutting off the shank and doing it again, correctly. Or, turning down the existing shank, rethreading. Add a bushing which would be threaded for the action. The bushing fix would cost near the price of a new barrel. Rifle is currently shooting fair groups at 200. 1.5 - 2 inch range. Threads in the action are fine. Barrel shank being a sloppy fit, no chance of them galling. Joe.

	A blind squirrel runs into a tree every once in a while.
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singleshotom Senior Forum Member Offline Posts: 371 Location: tofield AB. Canada Joined: Feb 23^rd, 2008	Re: Barrel shank and threads Reply #4 - Oct 12^th, 2013 at 11:20am	Print Post
	Joe, that job appears to be even worse then my work! As you say the bushing fix is the best way , but a lot of time involved. It is unfortunate, but some people have ruined perfectly good barrels by just that kind of work. I have in the past turned the shank down, lock-tite on a bushing and threaded the bushing/shank to save a barrel. A little less work then your method. But still time consuming. tom


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UtahDave Senior Forum Member Offline Posts: 396 Location: Heber City, Utah Joined: Aug 14^th, 2010	Re: Barrel shank and threads Reply #5 - Oct 12^th, 2013 at 11:38am	Print Post
	Thanks for the horror story Joe. I'm no gunsmith at at all and a mediocre machinist but I can cut better threads. I wondered if the shoulder (peened area) could be cut back a tad and then fit with a very thin shim/washer sized to get the barrel to index? At least the shoulder would then be square and in full contact. Does anyone ever solder a barrel into the action? Probably a very bad idea. I assume the headspace was ok... Is the reason for the so-so accuracy because the barrel is not tight in the action? Dave


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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12333 Location: Why, out West of course Joined: May 29^th, 2006	Re: Barrel shank and threads Reply #6 - Oct 12^th, 2013 at 11:51am	Print Post
	The barrel indexed up with enough tension. We left it alone because of that. The barrel is on the light side and sensitive as to where it's rested. As it is I think all the rigidity is at the peened shoulder and first couple threads next to the shoulder. I think the rifle is suffering from a lack of rigidity at the shank. Rifle is showing promise and it may become a tack driver now that Jack has a place to start. His previous groups were in the 6-7 inch range. Head space is okay. Sad to see a first rate barrel mauled like that. Jacks time and testing will tell. Joe.

	A blind squirrel runs into a tree every once in a while.
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Jeff_Schultz ASSRA Board Member Offline Posts: 1659 Location: Ransomville, NY Joined: Apr 25^th, 2004	Re: Barrel shank and threads Reply #7 - Oct 12^th, 2013 at 12:46pm	Print Post
	I'd put some blue loctite on it.

	"We have met the enemy and he is us." Pogo “There is no situation so bad that it cannot be made worse." Confidence- The feeling you get before you fully understand the situation.
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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12333 Location: Why, out West of course Joined: May 29^th, 2006	Re: Barrel shank and threads Reply #8 - Oct 12^th, 2013 at 12:59pm	Print Post
	Jeff_Schultz wrote on Oct 12^th, 2013 at 12:46pm: I'd put some blue loctite on it. Might help. Is that a penetrating Loctite? Joe.

	A blind squirrel runs into a tree every once in a while.
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Jeff_Schultz ASSRA Board Member Offline Posts: 1659 Location: Ransomville, NY Joined: Apr 25^th, 2004	Re: Barrel shank and threads Reply #9 - Oct 12^th, 2013 at 3:47pm	Print Post
	No it's the low strength 242 you can take apart. I think the wicking stuff is 290 and green, but that would help if you don't want to take it apart (as long as you didn't lube the threads).

	"We have met the enemy and he is us." Pogo “There is no situation so bad that it cannot be made worse." Confidence- The feeling you get before you fully understand the situation.
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graduated peep Ex Member	Re: Barrel shank and threads Reply #10 - Oct 12^th, 2013 at 5:26pm	Print Post
	I look at those photos and think, WTF ???? It kind of looks like maybe something slipped while it was being threaded ??? (maybe the guy dropped his beer and missed the mark on the lathe threading dial ?) Way to muck up an expensive barrel ! I hope you can save it.


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UtahDave Senior Forum Member Offline Posts: 396 Location: Heber City, Utah Joined: Aug 14^th, 2010	Re: Barrel shank and threads Reply #11 - Oct 12^th, 2013 at 7:10pm	Print Post
	Not that Joe needs more ideas but I'm laid up with a bad back so nothing better to do. The classic book "Advanced Gunsmithing" by Vickery has an interesting solution to this problem on pages 39 and 40. (You need to *Login* or *Register* to view media files and links) A guy used the old 19th Century alternative to epoxy...red litharge and glycerin. Red litharge is red lead oxide and it reacts with glycerin (easy to get at a pharmacy) and sets up like a rock. The book describes a fellow who "fixed" a poorly fitting Lugar barrel with it. I've used it to seal sight glass tubes into fittings on antique model steam engines and it still holds after 40 years. I'm sure modern adhesives are superior. Dave


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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12333 Location: Why, out West of course Joined: May 29^th, 2006	Re: Barrel shank and threads Reply #12 - Oct 12^th, 2013 at 7:26pm	Print Post
	I cannot find my Vickery book. Got it when I was twelve. Might have given it to my son. The book has the very best information on how to lap a barrel correctly. And much more. Had the spilled beer thought also. Joe.

	A blind squirrel runs into a tree every once in a while.
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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12333 Location: Why, out West of course Joined: May 29^th, 2006	Re: Barrel shank and threads Reply #13 - Oct 12^th, 2013 at 7:27pm	Print Post
	Hard to make threads that bad, pretty sure. Joe.

	A blind squirrel runs into a tree every once in a while.
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bpjack Frequent Elocutionist Offline Posts: 3780 Location: East Olympia, WA Joined: May 18^th, 2008	Re: Barrel shank and threads Reply #14 - Oct 12^th, 2013 at 7:43pm	Print Post
	I just finished casting up some more bullets and should be able to get out to the range with this rifle later in the week. I will post results. I will bring some duct tape just in case Jack

	People who think they know everything are a great annoyance to those of us who do.
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