Home Forums Hunting & Shooting Hunting Rifles Rechambering 250 Savage to 257 Roberts ?

So have a Ruger 77 in 250 Savage. Is it a big deal to rechamber to 257 Roberts? I will probably get torched for suggesting this. Not saying I am going to do it but was just wondering

I'm guessing the 77 is a short action? The Roberts likes long actions for seating out the 100 grain and heavier bullets for more powder room in the case. Check the twist rate too, I wouldn't want a 257 any slower than 1 in 10".

It's none of my business, you do what pleases you, but I'd rather have the 250. It doesn't give up much velocity to the 257 in a good bolt gun and it does it in a short action.

Shouldn't be, the Roberts will work in your short action and the barrel is a 1-10" twist.

Or you could make it a 250AI, with will give you everything a 257 does and a more skookum fit in the action.

It's a 1-10 twist and short action. What are the respective lengths of short action ruger 77 vs remmy 7 or whinny 70?

Ruger and Remington are pretty close, with the Ruger being a RCH longer (by about 50 thousandths, give or take).

Someone else will have to help you on the Winchester.

I believe a winchester short action (not a long with a mag block in it) is just a bit over 3.0 inches.

250AI would be my choice... check it vereses even a 257 AI.

250AI would b a pocket rocket. I love a good short-action rifle......Redworm.......

I have a c.1985 Ruger M 77 RL Ultralight in .250 Savage that I bought new and have used pretty extensively over the past three decades.

I also have a c.2013 Browning A-Bolt II Medallion in .257 Roberts that I won as a raffle prize drawing at the beginning last October -just in time to get it scoped, sighted in, and take it hunting. This is also a short action rifle.

I like the .257 Roberts, but frankly, it doesn't seem to do anything in the field or at the range that my .250 Savage hadn't already been doing for me. It just takes five more grains of IMR 4350 to do the same thing my .250 Savage does on a full charge of IMR 4320

Between the two, I like the .250 Savage better, because when run in short action with Ruger-ish dimensions, there's some "wiggle room" to seat bullets out a bit to kind of help compensate for throat wear in the barrel. In my short action A-Bolt, there isn't much room in the magazine to allow for running a longer max overall length than 2.780". I'm currently running my .250 Savage ammo at 2.515" overall in an action roomy enough to run 2.780" cartridges.

To me, they so much the same that I wouldn't rechamber the smaller one the larger one or re-barrel the larger one to the smaller one.

The .257 Roberts is shooting a bit faster by 50 fps than the .250 Savage is, but the A-Bolt I'm shooting the "Bob" out of has two or three more inches of barrel than my 20" tubed Ultralight.

The 250-3000 has 46+/- grains of case capacity, while the 257 Roberts has 10+/- grains greater capacity. The 10 grains difference represents a 21.7% increase in case capacity. If you apply the 4% increase in case capacity equals 1% increase in velocity potential, the 257 has, on paper, the potential for a 5.4% increase in velocity. For example, the same bullet fired at 3,000 fps from a 250-3000 has the potential for reaching 3,163 fps, assuming that all other variables are equal.

One way to make the 250-3000 more equal to the 257 Roberts would be to shoot 80 grain TTSX to get the speed and penetration of a typical 100 grain 257 Roberts load.

I have a Ruger 77RL MK2 in 257 Roberts that I'm looking to rebarrel to 7x57 and restock with a 77RSI stock, so, if you're not in a big hurry to change your 77RL in 250-3000, my barrel will probably be on the market in the next few months.

I don't know where or what you hunt, but if it's a good shooter and doing what you need. I'd leave it as is. Stuff happens, and you might not like the results.

You also have to consider the added cost of new dies and brass. .257 brass is probably as hard to find as .250 is, and you can't form it from relatively common .22/250 like you can now.

Additionally, if you have an RSI, those things are like gold these days.

I've got a 250 Sav AI. Gotta say I'm impressed. 117g Interlocks pushing near 3000fps in my 25 inch barrel.

A quick ream out and you're there mate.

I agree with Pappy. The Ruger in .250 Savage is kind of rare and it would be a shame to bugger up a rifle that is in high demand. If I wanted a .257 badly enough, I would sell the .250 and buy a .257. Now chambering it for .250 AI would appeal to me.

I've got 250s and 257s and would not want to rechamber any of the 250s to 257, BUT, it should not be a problem unless you wan to run long, heavy bullets. My 257 short actions are fine with any 100gr bullet and most heavy cup and core bullets. The 110-120gr high BC bullets or monolithic will be longer than you want to seat in the short action. A better plan for those bullets would be a 250AI.

I'm aware that the .257 Roberts has a greater case capacity. It seems to be more or less squandered in my short action A-Bolt II because of the bullet's intrusion in to the combustion chamber as a byproduct of seating depth when shooting 117-120 grain bullets.




In theory, yes, that's true. In reality, the velocity difference between my two rifles, shooting the same bullet weight, is only about 75 fps and not enough for me or, I think, the animals I shoot to notice.



Mine to me are substantively similar enough to be the same. Any difference between them hasn't been notice on the range or in the field, aside from the numbers they put up on the chronograph display.



I think there is some confusion here. I'm ABSOLUTELY NOT in a hurry to re-barrel my old tang safety M-77 RL in .250 Savage. It grouped down to .660" for five shots at 100 yards from new and it still does, three decades later. If I ever DO re-barrel it, it'll be because the tube that's on it is plumb worn out and the replacement with also be in .250 Savage. I already have a .257 Roberts -a Browning A-Bolt II Medallion. As I noted, it shoots a whopping 75 fps faster than my .250 does shooting the same 117 grain bullets and that could be down to the Browning having a longer barrel. I don't believe there is enough of a difference between them to matter, but I like the .250 Savage better because it offers more flexibility in bullet seating depth in a short action that the .257 Roberts doesn't offer.

They're both cool rounds. To me, they do pretty much the same thing and I am content with them as they are with no desire to turn them in to miniature .25-'06's. I could be happy with one or the other, but my preference remains ever so slightly for the .250 Savage

I bought my c. 1985 M-77 RL in .250 Savage when it was brand spankin' new, along with the Leupold Vari-XIIc that continues to grace it to this day. It was, to my way of thinking, the ideal combination of rifle, chambering, and optic.

Three decades of use have done little to soften my opinion.

I know that if I wasn't happy with mine, I'd sell it to someone who would be, then buy what would trip my trigger with the proceeds. I wouldn't consider butchering it, though.

Telecaster,

Actually, my response was intended for the OP, SLDUCK, not to anything that you posted.

I understand the draw of the 250-3000 and have around sixty of them.

'Sorry for the confusion.

Hummm, 3,000 FPS with a .250-3000 or 3163 FPS with a .257 Roberts. Do you think a deer would notice the difference after an expensive re-chambering job.
However, shooting the .250 until the throat is getting eroded out too far for bullet seating, then re-chambering to pick up a fresh throat further down the tube and extend the barrel life by a thousand rounds or so, yep, that makes some practical sense.

Dick. Thanks for ur imput