Gunsmithing AIAW 338 Barrel diameter?

Victor Co Heather

Victor Company USA
Commercial Supporter
Full Member
Minuteman
Aug 19, 2006
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SOCAL USA
www.victorcompanyusa.com
Can anyone mic ther 338 Super Magnum and tell me what the diameter is of the barrel directly below the muzzle break?

Or does anyone know what the barrel diameter is under the break (is there a shoulder where the break sits? like an FTE?)

Thanks,
MV