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Converting Ruger M77 MkII from Standard Long Action to Magnum?

 
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  #1  
Old 01-14-2010, 02:55 PM
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Join Date: Jan 2007
Location: Black River Falls, WI
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Converting Ruger M77 MkII from Standard Long Action to Magnum?

I currently have a Ruger M77 Mark II chambered in .280. Is it possible to convert this over to a .338 WM? The reason for this is I like the gun, but I would rather have a .280 AI in a Rem 700 than in my Ruger. I want a .338 that is comfortable to carry, and this gun fits the bill.

Besides opening up the face of the bolt, what other mods would have to be made?
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  #2  
Old 01-15-2010, 12:31 AM
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Join Date: Aug 2008
Location: Colorado
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Re: Converting Ruger M77 MkII from Standard Long Action to Magnum?

I don't know for sure, but I think the action length is the same. I have two short actions and a .338 WM, so I don't have a standard long action to compare with.

I think the only mods are opening the bolt face and add a muzzle brake on the new barrel...

I'd be happy to measure the mag box, ejection port, or anything else that I can on my .338 for you for comparison's sake.

You could try PM'ing Coyboy too. He seems to know them pretty well.
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  #3  
Old 04-19-2010, 04:50 PM
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Join Date: Jan 2010
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Re: Converting Ruger M77 MkII from Standard Long Action to Magnum?

338 Win Mag and Rem 7mm Mag each have a 2.5in case and I load the 7mm out to about the same length as 270 Win, ~3.30in.
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