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Wel got the bottom metal inletting finished this morning. Now hoping the barrel comes as promised.
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As I a wait for word when the barrel will be ready and ship I worked on inletting the trigger guard. It had its challenges but I believe I resolved them and its done for now until stock shaping time is upon me.[Linked Image from i.imgur.com]

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I am looking for thoughts from experienced persons with regards to the right and proper barrel thread dimensions when re-barreling a mauser like action. As you know there is an internal shoulder in the actions. The same with my Steyr 1896 Dutch. Some dimensions first:

Action face to internal shoulder .710"
Action face to bolt face .715"
Barrel thread 1 1/16" diameter - 12 TPI
Barrel shoulder diameter 1.140" same as was original
Take off barrel (which is original military barrel) length of threaded stub from breech face to barrel shoulder .708"

So you can see the barrel originally tightened on the action face and there was some clearance of up to .002" between the internal shoulder and the barrel breech face. (That also means there was up to .007" clearance between the barrel breech face and the bolt face but of course that is not concerning and not part of this question).

I am in the near future going to be installing a barrel on this action and wonder what the consensus would be on the length of the barrel thread stud be.
1. Factory at .708"?
2. Make it .710" so theoretically the barrel screws up against both the action face and the internal shoulder?
3. Make it .710"+ up to .711" so it only screws against the internal shoulder?

I did do some searching the forum but met with no success. Size of forum history and not sure the right search term were my stumbling block. I imagine tthis topic or similar has been discussed in the past so if you have a link to one of those past discussions please share.

Thanks

Last edited by LRF; 01/27/21 01:08 PM.
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I was taught option 2 in gunsmithing school at TSJC. I would make a mandrel and true up the face before barreling myself. I know of an excellent rifle builder who uses option 3.

55 degree threads?


http://www.bertramandco.com/
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Originally Posted by SKB
...55 degree threads?

Not sure, good chance they are. I am turning up a piece of steel as a test. I will then use it as a pattern for the actual barrel when it comes.

Question: if you want the barrel to screw against both face and shoulder and you "true " up the face using a mandrel, how do you true up the internal shoulder to match or be parallel with the face?

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I never have trued up the inner ring myself.


http://www.bertramandco.com/
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Originally Posted by SKB
I never have trued up the inner ring myself.

Thanks for your comments and thoughts smile

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Today I received the barrel I had ordered from Krieger. The order for the barrel was very specific as to sizes and contours. It is 7MM.
Krieger are as you probably know are not the less expensive of barrels.

The barrel I received is absolutely perfect. All dimensions are within .001" of the spec's I had given them. The outside is ground to about a 320 finish and is free of any ripples or discontinuities.

It is just beautiful and well worth the few dollars more.

AS a world traveler friend of mine once said, "It only costs a little more to go first class!" My hats off to Krieger

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How long did you wait for that barrel? They are wonderful barrels and I have gotten mine quite promptly and can sometimes find them in stock in a few places.


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BrentD, (Professor - just for Stan)

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Originally Posted by BrentD
How long did you wait for that barrel? They are wonderful barrels and I have gotten mine quite promptly and can sometimes find them in stock in a few places.

I ordered the barrel at the end of Sept. As I wanted a specific contour and diameters, it was not a stock item. The contour matches early Steyr rifles. 1.140 at breech and .570" diameters at muzzle 26" long.

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