I thought some of you might like to see what the breech of a Rem 760 looks like. If you remember i posted a poll on which to rebarrel a 760 to, a 9.3x62 or a 338-06. Its going to the later. The breech is as you can see two parts.
One part is as slip fit & the end with the locking lugs screws onto the barrel. I machined a bit on the barrel & made a relief cut to be able to unscrew the breech components without messing any parts up.

I would like to thank Mike Brazda the owner of Bayou Teche Guns for the doner barrel for this project.

Hmm. Can you take some measurements for us, thread pitch and diameter, as well as the shank(press fit) diameter?

Is there any positive means to clock the barrel extension to the middle piece or do you need a witness mark?

The threaded section is .875 OD 20tpi x .330 long. The slip fit section is .885 OD & the ring that slides on it is .8855 ID. Tigger it going to take a witness mark. I made a witness mark before I took it apart.

Is this one the LEFT HAND thread, or the RIGHT HAND thread.

Remington changed them part way thru production because the 742 would rattle the lug section loose from the threaded barrel.

Jim Wisner
Custom Metalsmith

last time i saw this done was on a 760 in 30-06 to 35 whelen some 25 yrs. ago worked great and yes you were smart to index mark the parts before take down. Wishing you much sucess on your project and thanks for sharing with us, Bill

Jim it is right hand threads. Made is 1989.

Any idea what the appropriate torque value to use would be when re-assembling?

Doug-

I love your idea of a 338-06 in a M760!

My dad hunts with an OLD M760 (30-06), and has killed a truckload of deer, elk, even antelope with it. (He is the definition of a one-gun-hunter ).

I'd think your set up would be just the ticket for his PA woods whitetail hunting.

OEH I machined the relief cut on the barrel before I attempted to unscrew the locking lug section. All i can say is that it was not as tight as the majority of bolt guns that I have rebarreled in the past 30 years. The threaded section is only .330 long & that would be a factor also.

CB I've been hunting with a 06 in a Rem 760 for years also & love it.

I still have the one I made up in the late 70s. I sent the barrel [old .270 Win]to Dick Nickel in WA and he rebored/rifled to 338. All I did when I got the barrel back was to run the 338/06 reamer in to make the neck/throat and that was it! Shoots real good. Real quick way to do it.

Aloha, Mark

Humbarger - There is an article call, "Wildcat Pump for the Alaskan Hunter" by Jay Turner in a book called "Big Bore rifles and Cartridges" by Wolfe Publishing (copyrite 1991) that outlines just such a conversion with a few loads thrown in. I had a .35 Whelen rebore done by Nickle a few years back; however, I don't think he is available anymore. I have a 7600 in a .35 Whelen that is one of my favorite rifle; a .338/06 sounds like another good caliber in a great rifle. Regards, Mags

Thanks for the info mags. I'll have to find a copy.