Any advise on this. I want to rechamber my 25-06 rem sendero to something fast and entertaining. Anyone have other sugestions?

Well I happen to think the 25/06 is a fair hot rod so I'm not all on board with you, but if thats what you want you will have an easier go if you bought a magnum rifle and re-barrelled to the .257 Weatherby or STW.
With your current rifle you will of course need to re-chamber as well as open the bolt face up to magnum size and do some feed rail work to open it up to except the fat shells and a new follower and spring.
Seems like a lot of work, like I said pick up a Magnum something and re-barrel to what you want is the cheapest alternative.

If you do pick up a new Magnum you can even get a Rem or Win short mag rifle and do a 25/300 WSM, very fun to play with and is a smokin' fast little number in a shorty action.

I think it would be easier, to do a .257 weatherby mag, Its a heck of a cartridge.(so is the .2506).
I like the 25s of most any stripe.
I shoot 2 roberts an AI and the weatherby.
From the .2506 up you get a bit of excelerated barrel erosion, and I am sure the 257STW would really heat up that sendero barrel quick.
...tj3006
But, it might be fun anyway.
Like the sound your project.\
...tj3006

I also lust after a .257 STW also but the supposed 500 round barrel life is kind of a heart breaker.

Even a 257 Wby would be a step up in performance. BUT, if you're willing to have the work done, since you have a R700 you DO have the magazine length to pull off the STW. OR, you could just get another Sendero in 7 STW or 7 RUM (I have seen a few RUM's on used racks for a good price) if you're not stuck to the quarter bore.

There is also the 257 Hawk, which is based on a blown out and improved 280 case. This would require just a simple rechambering. Z-Hat Customer, who does the Hawk line, also sells correctly headstamped brass, data and even loaded ammo.

I figured it might be alot of work to rechamber, not cheap either.I could rechamber to an 25-06 improved and get almost to weatherby velocites but the cool factor is it still there? I kind of want something unique and i realize that might not be cheap or easy. I geuss a new sendero in 264 win mag might be just diferent enough. The idea of 100gr barnes tsx @ 3800 fps from a 257 stw sounds like fun.
Thanks for the input guys i'll let you know how it works out.

A good smith should be able to do your barrel to the .257 Weatherby fairly quickly , open the bolt face probably work on the rails till it feeds,
You go to the STW and (I think) you would have a much bigger (more expensive ) Job and you would gain a little velocity, but you would have to form your brass and probably neck turn too.
...tj3006

...tj3006

Just to add some info to my 257 Hawk suggestion-

75gr - 3890
100gr - 3450
115gr - 3238

This was from a 26" barrel. Double checking on ammoguide, that puts it between the 25-06 on some VERY hot loads, and right with or juuuust behind 257 Wby. And a rechamber is probably only a couple hundred bucks, much cheaper then a rechamber plus bolt and feed rail work. Brass is 35$ a box, loaded ammo with bullet of your choice is 75$ a box...still cheaper then 257 Weatherby.

Hey milehighshooter i did check out the hawk and yes it is impresive. But unfortunatly they don't have alot of info on their site about the 257 yet, do you have some more data to pass on?

Snellstrom:
"Well I happen to think the 25/06 is a fair hot rod so I'm not all on board with you, but if thats what you want you will have an easier go if you bought a magnum rifle and re-barrelled to the .257 Weatherby or STW.
With your current rifle you will of course need to re-chamber as well as open the bolt face up to magnum size and do some feed rail work to open it up to except the fat shells and a new follower and spring.
Seems like a lot of work, like I said pick up a Magnum something and re-barrel to what you want is the cheapest alternative."

Yeah, what Snellstrom said. Lou

Have you thought about an AI 25-06? For your action and bolt it would be the easiest route and I think you would be pretty impressed with its' performance.

I have checked into the AI rechamber and yes it would do the trick but i'm thinking i want something you don't see everyday. The AI is definetly cheaper and also a quicker turn around time at a gunsmith.

quote:

have checked into the AI rechamber

I have nothing against the AI or the Hawk. As to the Hawk if you are going full wildcat(assuming you form your own brass) I've always felt the Hawk left capacity on the table. I doubt you would gain much from the STW over a WBY in a 26"(assumed) barrel. Other than greatly shortened barrel life. While I roll my own a good wildcat would be the Gibbs. Different and about the most you can get from an 06 case.

The 25 Gibbs looks like another good option. I geuss the big question is finding someone willing and able here in Canada.

My winchester 70 sporter 25-06 is quite entertaining and fast enough for me. My 1st group shot with it went .37 with a cheap scope. Anyway have fun with your project.

quote:

Originally posted by boatdoc:
Any advise on this. I want to rechamber my 25-06 rem sendero to something fast and entertaining. Anyone have other sugestions?

It's a high priced form of entertainment if you ask me.

quote:

The 25 Gibbs looks like another good option. I guess the big question is finding someone willing and able here in Canada.

When I had my .30-06 re-chambered to .30 Gibbs (about 30 yrs ago), the gunsmith that did the work,used a .30-06 Ackley reamer, setting the Ackley shoulder to the Gibbs depth.

Sorry boatdoc, only info on the Hawk I have is off the webpage. I don't know if thats one of his more common wildcats. Lots of info out there (and some on here) with the 375 and 411. 06 wildcats from 22-35 are numerous and most have little difference between them.

25 Gibbs would be a good choice too. The Hawk/AI/Gibbs are more or less similar, and should all be able to be rechambered with little or possibly no other work.

I don't see the love affair with the 25/06, and especially ANY 25 caliber magnum that is more of a powder consumer than the 25/06...

if one looks at 100 grain bullets and down.. then look at the difference in bore diameter between 257 and 6.5 mm.. ( .264 ) as being only 7/1000ths difference, there isn't much difference between the two...

with a 260 Remington, and a 100 grain bullet with a load of 43.5 grains of IMR 4064.. that load has an MV of 3350 fps out of a 22 inch barrel and 3450 fps out of a 26 inch barrel on my Rem VLS...

you drop that down to the available 95, 90 and 85 grain bullets, that velocity potential goes up...

with a 6.5 x 55 or 6.5 x 57 in a long action, with the 100 grain bullets and down, 3500 fps potential is there with a 26 inch barrel...

all with a lot less barrel wear....

so boring a 25/06 out to a 257 Weatherby or STW, I have to ask why???? unless barrel wear is your game.. I see no sense in it...

I have a 25/06 heavy barrel from a Savage Take off... actually I am debating on having it shortened a little and rechambered to a 257 Roberts, or a 257 AI.. or even a 250 Savage or 250 AI....

a 257 STW or 257 Weatherby, makes about as much sense as putting a 600 HP engine in a vehicle that you are going to drive on ice all the time...burn up a lot of tires, but sure don't get anywhere that much faster...