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Try RWS Gunsmithing in Iowa he builds some big boomers.
He had 2 375 barrels and I think a 408.
Good luck
Jeff
I am getting ready to start a Cheytac build as well - can you advise as to what barrel specs David recommends. Thanks for any info you can share. Mike D
Yes, I don't think that I really understand this area very well either (i.e., lost river bore/groove specs vs conventional bore/groove specs vs other) - still very helpful- been meaning to contact him and ask for recommendation anyway- thank you!
I have 2 375 10tw 5R's in stock right now, one finishes 30" and one will finish 32" both fluted and out 1.450 stock
Chris