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Joined: Jan 2010
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What is the minimum muzzle diameter to go from .308 to .366 bore diameter?

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I like to see .288" over groove dia. .288+.366=.654 ish.


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Wayne York will go down to .200 over bore diameter. He says there's little pressure at the muzzle.


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Originally Posted by Dinny
Wayne York will go down to .200 over bore diameter. He says there's little pressure at the muzzle.
I am sure he is right, I measured a dozen or so factory factory barrels of the featherweight or lightweight class...my arbitrary .144 ish wall thickness is not based on engineering fact...just what the mfrs were doing. Pressure of course is not the issue, if there is a front sight to be fitted, it's nice to have some meat to work with....unless you sweat solder or use a sweat band.


Well this is a fine pickle we're in, should'a listened to Joe McCarthy and George Orwell I guess.
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Talked to Wayne and he said he could/would re-bore my Ruger RSI 30/06 to 338/06. Now I ust need to decide if I am going to do it.


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