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.257 Wby --> .25-06 AI

 
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  #1  
Old 01-14-2011, 10:24 PM
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Location: Helena, MT
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.257 Wby --> .25-06 AI

Talked to my 'smith this afternoon. I was asking him if there was a way he could close up the bolt face from a magnum to a standard on my 700 Rem. Told him I was having second thoughts about the .257 Wby he was gonna start on for me soon. He said he could do it by sleeving the bolt face and cutting it for a Sako type extractor. Then he said "Wait!". He had a standard face bolt body laying around. He could give me that one and keep my magnum bolt body. And he had a reamer for a .25-06 Ackley Improved. He said he much preferred the .25-06 AI over the .257 Wby.

So I said "Let's do it." I'm liking this a lot! I may be giving up a bit of speed, but from what I can find, not very much. Nice!

-- gr8whyt
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  #2  
Old 01-14-2011, 10:54 PM
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Re: .257 Wby --> .25-06 AI

I have a 25 x 284 that you wouldnt tell much difference with and dont have to fire form cases.
mike
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  #3  
Old 01-15-2011, 01:00 PM
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Re: .257 Wby --> .25-06 AI

Quote:
Originally Posted by gr8whyt View Post
Talked to my 'smith this afternoon. I was asking him if there was a way he could close up the bolt face from a magnum to a standard on my 700 Rem. Told him I was having second thoughts about the .257 Wby he was gonna start on for me soon. He said he could do it by sleeving the bolt face and cutting it for a Sako type extractor. Then he said "Wait!". He had a standard face bolt body laying around. He could give me that one and keep my magnum bolt body. And he had a reamer for a .25-06 Ackley Improved. He said he much preferred the .25-06 AI over the .257 Wby.

So I said "Let's do it." I'm liking this a lot! I may be giving up a bit of speed, but from what I can find, not very much. Nice!

-- gr8whyt
personally I'd do a .257AI before I'd do the 25-06 or the Weatherby. Been around all three a good bit. The 25-06 is a little over max capacity for a 25 caliber bullet, and even Ackley says you won't see much of an improvment (if not worse), but will see better case life. Forget the loading manual crap about the .257 WBY.! This round can really be pushed at least another 150 to 200 fps faster than most manuals claim. 3350fps is easilly obtainable with it, and still be safe. The downside is that the cases are expensive, and often hard to come by. Before I'd build a .257 mag, I'd do a .270 mag (or better yet a 7mm WBY mag).

You might want to give this some thought. All Ackley cases have the same taper per inch, and the 25-06 and a .257AI have the same case head diameter. So the shoulder diameter will be very close on both rounds (less than .0015"). Both have the 40 degree shoulder as well. So why not just take the 25-06 reamer and run it in a little short for a .257AI headspace, but with the long 25-06AI neck! This round would be fantastic at the minimum. Should push a 120 grain bullet to 3100 fps. Yet fit in your magazine well very well with very long bullets. For dies you simply take 25-06AI full length die and cut it off at the bottom. Take a .257 Roberts Forster seater and run the 25-06 reamer in the sleeve till it's at the right head space depth.
gary
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  #4  
Old 01-15-2011, 09:20 PM
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Re: .257 Wby --> .25-06 AI

Quote:
Originally Posted by Trickymissfit View Post
personally I'd do a .257AI before I'd do the 25-06 or the Weatherby.
Thanks, tricky. I've had it up to here with magnums. I've shot a 7mm Rem Mag for more years than I care to admit. That's the action I'm having re-barreled. And I have a 300 win mag that I shoot when I'm in the mood for some recoil and when I need to get rid of lots of powder. But it is my elk go-to gun. But I need something fun to shoot. So I think this .25-06 AI is gonna be sweet.

Maybe some 100gr Nosler Ballistic Tips spinning out there about 2600fps+ should be some good antelope and deer medicine. Maybe even a Big Horn ram if I ever get luck enough to draw a tag.

I'm having that 700 Rem action blueprinted and fitted with a Lilja 1 in 10 twist 3-groove tube at 27" and fitted to a B&C Medalist stock with nice Williams bottom metal and a Jewell trigger. My 'smith is top notch and I'm hoping this rifle will make some small groups if make it some ammo it likes and I do my part.

-- gr8whyt
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  #5  
Old 01-16-2011, 12:12 PM
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Re: .257 Wby --> .25-06 AI

cases are harder to find for a 257 weatherby but they can be made from 7mm mag, and they factory 257 weatherby (norma) brass will live longer than most any 25-06, and to do a 257rob AI ballistically copys a 25-06, with a medium weight rifle in 257 wby mag neither of the other come close with equal barrel lenght, show me a 25-06AI that will blast a 100 grn out just under 3800fps from a 26" pipe!
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  #6  
Old 01-16-2011, 02:51 PM
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Re: .257 Wby --> .25-06 AI

To each his own, but the 25-06AI has worked well for me. I have a Senero with the 26" tube, Kirby Allen did the work, along with a skim bed, trueing the receiver, sako ext, etc.

Mr. Ackley was very intelligent & we owe him alot, but what he said about the 25-06 simply is not valid today, along with the 6.5-06AI & a couple of others. We all know why, RL25, IMR7828,
Retumbo & many other powders were not avail. then & has changed the level of usefullness for certain rounds dramatically & the 257 Wea. is another good example.

I think the Roberts AI is fine, but if a younger shooter does not allready have a Roberts or the brass, I would never advise them to get one. Why go that route with the factory 257Rob ammo being very hard to find in some areas & thus hard to use to fireform or load new brass (you must order), only to wind up with a load that nearly matches (but not quite) a 25-06 handload.
If you want a smaller, shorter 22" tube deal I guess it could be a Rob, but I use other cal. for woods rifles & think of 25's a windy day?larg Var. rifle & a preferred tool for Antelope/Mule Deer & some Whitetail situations.

There are for me at least some advantages of the 25-06AI over the Wea. Like BW83 said, you aren't going to match 257wea. potential with the 25-06AI, but I saw that getting a velocity halfway between the 25-06 & FACTORY 257wea. loads was a good place to be for me at least.
The spread of 257wea. & safe, book handloads for the 25-06 is roughly 250fps, I easily get in the middle & a wee bit closer to Wea. fact, in fact, all with good brass & able to shoot fast 25-06 & a match chamber. I am pleased.
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  #7  
Old 01-16-2011, 03:31 PM
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Re: .257 Wby --> .25-06 AI

I have been shooting a 257 Wby in a 8 twist barrel and 130 gr Wildcat VLD bullets. So far I have killed two cow elk and a deer in the 450 yard range and an antelope beyond 1000 yards. I have the barrel threaded for a brake but never use it. Recoil is too mild to need it.
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Last edited by Buffalobob; 01-16-2011 at 05:54 PM. Reason: typo
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