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7mm-300 Winchester Magnum Experience?

 
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  #1  
Old 06-03-2010, 05:31 AM
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7mm-300 Winchester Magnum Experience?

Necking the .300 Win Mag down to 7mm has me intrigued. I googled this wildcat, McWhorter rifles seems to like it.

What I'm looking for is any real life experiences with this round.

I'm considering a build on a M-70 Classic Stainless with a 24" barrel.
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  #2  
Old 06-03-2010, 07:03 AM
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Re: 7mm-300 Winchester Magnum Experience?

>100fps faster than a 7mm wby. and a whole lot cheaper to shoot. Not quite the performer of the 7mm ultra but much more efficient and less recoil. McWhorters told me they are getting 3150fps out of 180 Bergers. I have already ordered the action. McWhorter will be building mine as soon as all the parts come in.
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Old 06-03-2010, 07:17 AM
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Re: 7mm-300 Winchester Magnum Experience?

With what length barrel did McWhorter quote those velocities?
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Old 06-03-2010, 08:08 AM
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Re: 7mm-300 Winchester Magnum Experience?

Here is a link to the thread on the one I have been working with. I will build another... awesome round!

Anyone own a 7mm 300 Win Mag?

Jeff...
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Old 06-03-2010, 08:08 AM
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Re: 7mm-300 Winchester Magnum Experience?

Quote:
Originally Posted by nyrifleman View Post
With what length barrel did McWhorter quote those velocities?
Allan at McWhorter Rifles told me he was getting 3150 with a 26" barrel.

Last edited by jbroadnax; 06-03-2010 at 08:18 AM.
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  #6  
Old 06-03-2010, 08:31 AM
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Re: 7mm-300 Winchester Magnum Experience?

Quote:
Originally Posted by Broz View Post
Here is a link to the thread on the one I have been working with. I will build another... awesome round!

Anyone own a 7mm 300 Win Mag?

Jeff...

Jeff,

Thanks for the attempt, but I think you forgot something.
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  #7  
Old 06-03-2010, 08:35 AM
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Re: 7mm-300 Winchester Magnum Experience?

As close as I can tell with my Chrony and using what matches the drops in my exbl program I am getting 3175 ~3180 with 180 Bergers and a 28 1/2" barrel.

Jeff
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