You can buy Remington 700 lugs in different thicknesses and it will work, the problem is there is no notch or bump to index them like a Savage lug. SSS and Northlander sell thicker lugs, right off the top of my head I don't remember what they measure. (About .10 thicker than stock) From what I have read this is a common problem with McGowan barrels, they are just threaded too long. Personally I would call them and explain the problem, and they should fix it.
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