6mm to 257Roberts

[Divernhunter]

I have a tang safety 6mm Rem M77.
My daughter took her 257Roberts tang safety M77 with her when she got married.
I would like another 257R. Can I rebarrel the 6mm to 257R? Is the action length the same? Is the boltface the same?
Thanks for any help.

 

[Alan in GA]

Yes.

 

[9.3x62]

Is the 6mm Remington bore worn out? If not, I'd stay with the 6mm. It is an excellent round based on the same case as the 257 Roberts. In fact, the 6mm Rem. and 243 Win. are the two cartridges that put a bad hurting on the 257 Roberts, as far as sales go. They are supposed to cover the varmint through deer class game better, for those that want such a rifle. The 257 R would do a little better on larger game because of the larger diameter bullet and weight. But the bullet weight difference is only about 20 grs.

 

[gtxmonte]

The "Bob" has a pretty loyal following and while I myself am found of obscure calibers..........rebarreling a tang safety 6mm to the "bob" is surely not something I would do. You can get decent results from the .257 if you handload, but for shelf ammo, the 6mm is better.

Now, if you just LOVE the "bob" and want one..........the answer to your question is yes.........LOL!!

 

[Divernhunter]

I will not hunt larger game with a 6mm bullet.
Others do.
I do not. I also have a number of rifles better suited for that purpose.
I also have rifles suited for varmint shooting.
I like the 257R and have a T/C Encore pistol barrel in it. I would like to put together another nice 257R for myself and to give it to my grandchild when the time comes. Both my daughter and her husband are hunters. I suspect any children will be also.

Thanks to all for the help. I will hang on to the rifle and not sell it.

 

[Lloyd Smale]

have to agree with the others. Id never take a perfectly good 6mm and have it rechambered to 257. I have both and like both but you gain very little if anything in the game field and buying and having a new barrel fit will end up costing you 2/3s the price of just going out and buying a 257 and then youd have both. Especially if your patient and watch for used ones.

 

[macs77]

I seem to recall that Ruger made the 257R on the long action and the 6MM on the short action.

 

[6mm Remington]

I would not mess with it as the 6mm Remington is such a great cartridge and they are so close in performance to each other. That being said, if you really have a desire for the .257 Bob, it too is fantastic and they both deserve way more attention then they get!

 

[CLAYPOOL]

The 6 is worth good money also. Buy another to go with it. That's what I'm doing, BUYING the crap out of every thing I can. I'm behind on shooting several. Components are not a problem when the new shooting room goes up when we can pour concrete...

 

[robertkirksey]

You would be dollars ahead to sell the 6mm and buy a .257 Roberts (who the hell is Bob?).

 

[picketpin]

Bobs (257s Roberts) usually do best with buets right around 100 grains as a general rule. zGiven that you can shoot a 95-100 .224 culet out of the 6mm Remington at the same velocity but a slightlt highers BC due to longer skimmier shape, any advantage to the slightly broade cartridge face it a trade off at best. I have a LOT of BOBs. I'd nevr change one to 6mm Rem. On the other hand zzI'd nevr bother to make a 6mm Rem into a Bob. You really need to go to 257AI or 25-06 to gain any balistic advantag over the Bob with 120s. Then you sort of negate the dual funtion because like most overbore cartridges they do best with heavy for caliber billets 15-117-120s and it takes MORE porder to dricve a 75 as jsut due to exspansion rates.

The 6mm Rem and the Bob are apples and apples when it comes to 100 grain bullets. Why bother?

Ross

 

[dave524]

I seem to recall that Ruger made the 257R on the long action and the 6MM on the short action.

Think the 257R have been done on both, I recall early round tops with the bent bolt handle often had an excessively long throat , bullets seated to run thru the mag were no where close to the rifling when chambered.

Almost bought one back mid seventies but ended up with a pair of 6MM's , a Liberty model varminter and a light tubed sporter, can't say enough good things about the 6MM Rem.

 

[picketpin]

The first 77s in 257 Roberts were 1972 on the Round top action as the ST with sights and a 24" middle weight barrel. The 257 Roberts was always chambered in the long action in the 77. We owned enough around the family we simply took in all the 257R Rugers and had then throated to 3.00 OALL as compared to 2.75 SAAMI. That way we load one length for all the Bobs in the family and in a picnh all function with factoery ammo.

RWT

 

[6mm Remington]

Here's my son with his Ruger MKII in 6mm Remington. We put a Boyds nutmeg laminate stock on it which we had pillar & glass bedded. He was using a 90 gr. Nosler E-tip at 3140 fps. This is his first elk and he shot her laying prone from 350 yards. One shot tight behind her right shoulder and the bullet went through lungs and broke her left shoulder as it exited. She only went 20 yards and fell down. I know the 6mm is light for elk but with good placement and good bullets like the E-tip, Partition, and Accubond, they perform a lot "bigger" than what they are. For deer and antelope, they are pretty darn hard to beat.

 

[RedLabel]

My uncle used to hunt elk in Wyoming with his .257 Roberts. Always heard legendary stories about that gun but never got to shoot it. Another member of the family but on the other side still hunts elk with it.