Rebarreling a Ruger M77

[700Remy]

is there any issues with doing this? would like to replace my 7mm barrel and make into a 264 win mag.

 

[SBS]

Bolt lugs (but you probably know this) see https://forum.accurateshooter.com/threads/ruger-m77-re-barrel.3795799/

 

[CCM]

The last one I did, the receiver threads were .015" out of conentricity from the bolt raceway and crooked to boot. That was a tang safety gun.

Be careful how you grab the action to break loose the barrel, and don't over torque the new barrel.

 

[Will Henry]

There is no action easier to re-barrel than a Ruger 77. You can use the same inside wrench as for a Remington. or a flat outside wrench. WH

 

[gunsandgunsmithing]

There is no action easier to re-barrel than a Ruger 77. You can use the same inside wrench as for a Remington. or a flat outside wrench. WH

Maybe a post 64 push feed. About the same. Flat breech face, thread size and pitch. All that stuff. The pre 64, new ones and the controlled round ones are a different story. But yes, the Ruger is about as easy as it gets as long as you don't have any trouble getting the old bbl off/on. I think they're a cast action so while small, there's a chance of the action cracking but it's slim. Never had a problem.

 

[Will Henry]

Never seen or heard of a Ruger cracking. In addition, none of the Ruger 77's I've taken apart were tight at all. In fact, it got so my first move was to give a moderate tug with a 12 inch crescent wrench. They usually came right off. The exception were those rifles with sights; these were usually fairly tight. WH

 

[gunsandgunsmithing]

Never seen or heard of a Ruger cracking. In addition, none of the Ruger 77's I've taken apart were tight at all. In fact, it got so my first move was to give a moderate tug with a 12 inch crescent wrench. They usually came right off. The exception were those rifles with sights; these were usually fairly tight. WH

Me either. Never had a problem, just repeating what I've heard in that regard.

 

[urbanrifleman]

I believe you will find that it is the same tenon thread as the Ruger American. Which is the same as the Tikka t3.

 

[Bat Rastard]

I believe you will find that it is the same tenon thread as the Ruger American. Which is the same as the Tikka t3.

Would that make a 77 a good candidate for a barrel nut?

 

[gunsandgunsmithing]

I believe you will find that it is the same tenon thread as the Ruger American. Which is the same as the Tikka t3.

I think you are right, or very close. I don't remember exact length, hs etc.

 

[urbanrifleman]

I think you are right, or very close. I don't remember exact length, hs etc.

1" x 16tpi, same as RPR and Ruger American. I can make a nut barrel for it.

 

[TrapperBR549]

Would that make a 77 a good candidate for a barrel nut?

This is way out of my league so probably a real dumb question but how do you get the extractor cut out to line up right with a barrel nut?

 

[gunsandgunsmithing]

This is way out of my league so probably a real dumb question but how do you get the extractor cut out to line up right with a barrel nut?

It's just a matter of timing it to where it lines up when tightened. There's some wiggle room in regard to torque, too. So a little more or less torque can line things up. But you're right. All dimensions are somewhat critical...headspace and bolt to tenon clearance and then timing up the cut when tight. It's magic! Lol!

 

[kendog]

This is way out of my league so probably a real dumb question but how do you get the extractor cut out to line up right with a barrel nut?

This does not apply to a M77. Claw extractor, yes, but breeches up similar to a M98 Mauser. Give yourself .005" to .010" clearance from the most forward point on the bolt.
For claw extractor indexing see a post I made a few days ago on another forum. https://www.practicalmachinist.com/forum/threads/model-70-winchester-extractor-cut.418929/
Probably take a little figuring and fiddling to work with a barrel nut but I imagine it can be done.

 

[kendog]

Never seen or heard of a Ruger cracking. ....

This. Rugers are tougher than a whores heart.
They only crack on the internet.

 

[gunsandgunsmithing]

This. Rugers are tougher than a whores heart.
They only crack on the internet.

Same here....like I said. Never a problem but I don't discount anything based only on what I HAVEN'T seen.

 

[Will Henry]

Re. the barrel nut: I have a Ruger action to which I fitted Savage barrel. I threaded the barrel for the Ruger, then used the Savage barrel nut to lock it in place. There have been few times that I have used a nut; usually when the barrel diameter won't provide enough shoulder. WH

 

[Machinist John]

Tang safety M77, installing a NOS 338 Win Mag barrel. Rifle was a 7mm Mag.

Using a tool post belt grinder to grind off the bluing and the stupid warning lettering.

Receiver was trued, finish reamer used to properly set head space

Range rod to determine seating depth.

Bullet base is threaded, case neck is bored for a slip fit.

Making pillars, 7075 T6 aluminum

Bedding, Fiberglass stock, the rifle is for high country elk hunting on horseback and is built stout for scabbard carry.

Next will be a nice cold blue.

Archery bull from the favorite hunting area.

Packing

 

[Machinist John]

Same here....like I said. Never a problem but I don't discount anything based only on what I HAVEN'T seen.

This. Rugers are tougher than a whores heart.
They only crack on the internet.

Yep. 49C on the Wilson Rockell Tester.