Pre-64 Winchester Model 70 Barrel Stamping

Fairlane66

January 14, 2016 18:26

I just removed the barreled action of a mid-1963 Pre-64 Winchester Model 70 chambered in 300 Win Mag from its stock and was surprised to find "30-06" stamped on the bottom of the barrel just ahead of the recoil lug. The barrel bears all the standard Winchester markings and is clearly factory-marked "300 Win Mag." So, why the mismatch? I don't have my Roger Rule book to research this one, so I thought I'd ask the experts. Was Winchester simply using up 30 Caliber Model 70 barrels in in 1963 and chose to chamber plentiful 30-06 barrels for the new 300 Win Mag? Or, do I have some sort of counterfeit 300 Win Mag on my hands? I suspect the factory was just using up 30-06 barrels, but wanted to see what the majority opinion was in this case.

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  CapnMidnight

  January 14, 2016 19:01

  I'm not authority enough to say yes or no, but, I will say there are probably more counterfeit pre 64 model 70 300 Win Mags out there than there are originals. You do realizes that there where only 4,916 of the real deal built.
  How long have you had your 300 Win?
  W.D.

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  Fairlane66

  January 14, 2016 23:26

  I've only had it a few months.

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  Bert H.

  January 15, 2016 06:18

  You should assume that it is a counterfeit [:(]

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  Ambrose

  January 15, 2016 06:26

  According to the Roger Rule book, (page 160, photo 6-28) there is a departure from the standard barrel caliber stamping for the .300 Winchester Magnum. This is the viewable stamping, not the under chamber marking. Instead of "-trade mark-" under the "WINCHESTER", the .300 has the "R" in a circle right after the "WINCHESTER".
  
  I have, so far, not had any luck in finding the under chamber markings in the book. But Winchester was known to use up parts inventory so I would not be surprised that they used .30/06 barrels to make up .300 Winchester Magnum rifles.
  
  I'll spend a bit more time with the book to see if I can confirm the use of '06 barrels. But, in the meantime, if your rifle has the circle "R", I'd say it's genuine.
  
  EDIT: Further research indicates that under-barrel stamps were phased out in 1956 and more or less completely gone by 1959 with the exception of the .300 Winchester Magnum. For the .300, a stamp seldom used on the .300 H&H Magnum was reinstated. Your barrel should have the stamp "300M".

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