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Will a 257 Wby Reamer Clean Up a 25-06 Chamber?

 
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Old 10-28-2013, 06:03 PM
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Will a 257 Wby Reamer Clean Up a 25-06 Chamber?

I was toying with the idea of having an Encore 25-06 barrel rechambered to 257 Wby. Obviously the barrel can not be set back so I was wondering if this can be done. Thanks!
Sam
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Old 10-28-2013, 07:06 PM
Edd Edd is offline
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Re: Will a 257 Wby Reamer Clean Up a 25-06 Chamber?

I'm not a Gunsmith but I believe it can be done. Unless you have a custom reamer made, there will probably be more to it that just running a 257 reamer in the existing chamber. If you look at the SAAMI drawings you will see that a 25-06 has a slightly larger neck and freebore diameter than a 257 Weatherby. So without a custom reamer, you will have to ream the chamber, neck, and throat in separate operations with separate reamers.
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Old 10-28-2013, 08:24 PM
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Re: Will a 257 Wby Reamer Clean Up a 25-06 Chamber?

Quote:
Originally Posted by sambo3006 View Post
I was toying with the idea of having an Encore 25-06 barrel rechambered to 257 Wby. Obviously the barrel can not be set back so I was wondering if this can be done. Thanks!
Sam

The best/simple thing to do is re chamber it to 25/06 AI. that will step it up a notch and keep the
chamber wall close to the same. (stronger). and you should pick up 100+ ft/sec.

J E CUSTOM
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Old 10-28-2013, 08:28 PM
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Re: Will a 257 Wby Reamer Clean Up a 25-06 Chamber?

J E Custom,
Wouldn't that result in too much head space in an Encore barrel? Plus I've got brass and dies for 257 Wby and not for 25-06 or AI.
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Old 10-29-2013, 08:25 AM
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Re: Will a 257 Wby Reamer Clean Up a 25-06 Chamber?

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Originally Posted by sambo3006 View Post
J E Custom,
Wouldn't that result in too much head space in an Encore barrel? Plus I've got brass and dies for 257 Wby and not for 25-06 or AI.

Head space would have to be set while chambering the 25/06. it will clean up and increase the chamber size.

25/06 AI will have close (But not quite)to the same performance as the Wby and has no belt.

Also with the larger case head size there will be more action loading due to more Sq/inches of
surface area.

The Encore is a strong action but brake open actions can be over loaded and gain more head space
when loaded with hot loads or loads that they were not designed for.

Build what you want but be aware of these potential problems.

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Old 10-29-2013, 11:56 AM
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Re: Will a 257 Wby Reamer Clean Up a 25-06 Chamber?

Thanks J E Custom! I did some web research and it backs up what you said about stressing the action. Sounds like I would be better off to go ahead with a 25-06 AI barrel from MGM if I want to scratch the itch. I'm sure I wouldn't have any trouble selling the 257 Wby brass and dies.

On the rechambering of a standard cartridge chamber to an AI chamber, I have always heard that it is best to set a barrel back slightly (which wouldn't be possible with an Encore barrel without major alteration) so that the standard case will have a slight crush fit in the shoulder to ensure that there won't be any stretching in the case head area during fire forming.
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Old 10-29-2013, 02:09 PM
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Re: Will a 257 Wby Reamer Clean Up a 25-06 Chamber?

Quote:
Originally Posted by sambo3006 View Post
On the rechambering of a standard cartridge chamber to an AI chamber, I have always heard that it is best to set a barrel back slightly (which wouldn't be possible with an Encore barrel without major alteration) so that the standard case will have a slight crush fit in the shoulder to ensure that there won't be any stretching in the case head area during fire forming.
The head space is slightly different for a AI but it's also a wildcat so you can technically put the shoulder where ever you want it as long as you know that and adjust your dies accordingly. Necking brass up and then back down to create a false shoulder (to make the cases tight in the chamber) or seating a bullet into the lands for fireforming is all that needs to be done.

One thing to think about also when rechambering is the neck diameter. In the case of your original question, if the neck diameter isn't larger on the Weatherby then you would have a stepped neck because the Weatherby is a longer case and will cut past the original chamber. Rechambering is better when the new cases body will clean up the existing chamber or another words going with a much longer case.
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