A '53 .338 may be all Winchester parts, but it is a rebarrel. In addition, unless it is a magnum receiver for .300 H&H or .375 H&H, someone has probably worked on the action rails and bolt face because there were no "short" magnums (.458, .338, .300, and .264) in 1953.
As far as gurus, don't forget Poconojack, Balltownbob, and BobinNH (RIP). I'm sure I forgot someone, and besides, there are undoubtedly "levels" of Guru. Even the best never stop learning.
Last edited by GunDoc7; 05/14/17.