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257 wby mag

 
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  #1  
Old 10-25-2013, 12:48 AM
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257 wby mag

why do weatherby rifles have so much free bore that you can't seat bullets close to the
lands like bullet manufactures recommend.
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  #2  
Old 10-25-2013, 04:48 AM
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Re: 257 wby mag

Quote:
Originally Posted by elkcountry View Post
why do weatherby rifles have so much free bore that you can't seat bullets close to the
lands like bullet manufactures recommend.
So you can have slightly more powder in the case before you get to maximum pressure and thus get higher velocity.
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  #3  
Old 10-25-2013, 01:07 PM
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Re: 257 wby mag

Also because freebore helps reduce chamber pressures and throat erosion.

It also allows you to seat bullets at magazine length without your rifle being picky about seating depth.
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  #4  
Old 10-27-2013, 06:59 PM
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Re: 257 wby mag

May i tag a related question to the post?

Is the Weatherby Freebore the same thing as Throating by another name?

Brit.
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  #5  
Old 10-28-2013, 12:29 PM
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Re: 257 wby mag

Quote:
Originally Posted by BRIT View Post
May i tag a related question to the post?

Is the Weatherby Freebore the same thing as Throating by another name?

Brit.
Yes. If your gunsmith has a throating reamer in that caliber, he can give more free bore by removing some of the lands. I had this done to my 338 Win Mag. so I can seat the longer projectiles out much further, use a few more grains of powder and get higher velocities as the Model 70 magazine is nice and long once the spacer is removed. If the magazine doesn't allow you to seat the projectiles out further, throating can allow you to get higher velocities with slightly more powder, but sometimes accuracy may suffer as the projectiles are further from the lands.
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  #6  
Old 10-28-2013, 06:07 PM
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Re: 257 wby mag

Hi guys thanks for your replies that info helped lots.

I came across some info info in my quest for better accuracy of my 257 wby
I load barnes 100 gr tsx bullets with a coal of 3.160'' as per barnes reloading
manual # 4 .
I decided to buy a box of wby tsx cartridges to see if they would give beter accuracy and I noticed the bullets were seated to 3.120'' why would wby
do this and is my accuracy problem because i'm seating my bullets to far
out.
p/s I haven't tryed to shoot the factory ammo yet
.
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  #7  
Old 10-29-2013, 09:01 PM
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Re: 257 wby mag

XXX are picky about depth. .050" is normal from lands. Load up some between and see what works. It's the only way you will know....
What load are you running now? Have always had great luck with 72g of RL22. 215M and the 100's...

The Nosler 110 Acubonds shoot well also...
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