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Gunsmithing tenon length

c451812

Private
Full Member
Minuteman
Apr 22, 2013
3
0
brigantine nj
Hi: I was given a large ring 98 mauser receiver, the front portion that holds the upper handguard was removed but too much metal was removed leaving only .500 " of thread. Is this receiver of any safe use. Thank you, Joe Carroll
 
There's only about 0.630" from receiver face to the inner collar on an unaltered 98 action. I think the cartridge selection you have in mind might determine safe or not safe
 
tenon length

There's only about 0.630" from receiver face to the inner collar on an unaltered 98 action. I think the cartridge selection you have in mind might determine safe or not safe

Thank you for your response, I agree with you and was hoping for some input as to which cartridge if any, would be safe with only six threads . Thanks again. Joe
 
...would be safe with only six threads

The threadform in the Mauser action has 97% capacity on 3 full threadforms, the 6 threads you have left is likely only 5 full threads but the difference between 5 full threads and 15 full threads (which would be around 2.4x's longer than standard) is 1% or less.

I would have no issue putting any standard case-head round in that action (308/30-06/x57 Mauser case head)
 
The threadform in the Mauser action has 97% capacity on 3 full threadforms, the 6 threads you have left is likely only 5 full threads but the difference between 5 full threads and 15 full threads (which would be around 2.4x's longer than standard) is 1% or less.

I would have no issue putting any standard case-head round in that action (308/30-06/x57 Mauser case head)

Hi: Thank you for your input, it's encouraging. The reason it is so short, I found out, is the guy tried to square the receiver face with a stationary belt sander and just kept trying to get it square. Well, thanks again. Joe
 
Hi: Thank you for your input, it's encouraging. The reason it is so short, I found out, is the guy tried to square the receiver face with a stationary belt sander and just kept trying to get it square. Well, thanks again. Joe

If you can grab his ear, you might tell him that a Mauser bbl's primary seat is not on the receiver face, it's the shoulder at the base of the threads.;-)
 
Could be bohem. I can only speak from experience. Every large ring Mauser I've worked on had it. Guess I'm running with the wrong crowd. I despise diversity!
 
Could be bohem. I can only speak from experience. Every large ring Mauser I've worked on had it. Guess I'm running with the wrong crowd. I despise diversity!

I've done a few small rings that don't have it, c. late 20's. Only half of the Turks have had it and they're large body, small tenon. It takes all kinds of work, the MN91/30's are similar in the little variations that happened.

BTW, not trying to give you a hard time, just sharing info that I've found myself.
 
I've done a few small rings that don't have it, c. late 20's. Only half of the Turks have had it and they're large body, small tenon. It takes all kinds of work, the MN91/30's are similar in the little variations that happened.

BTW, not trying to give you a hard time, just sharing info that I've found myself.

You should give me a hard time. None of us know everything. If I'm wrong it is your obligation to correct me.

I try to avoid Turks and Spanish, fortunately I haven't had to deal with a Nagant rebarrel. Kind of redundant considering cost of rifle and what it would take to rebarrel.