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1949 model 70

  1. Rifles and Rifle Cartridges
    So i have a Winchester Model 70 7mm from i think 1949. The SN is 123XXX. I was wondering how common the 7mm is? I am trying to find out what size round this takes. I went to the gun store and we tryed to put a 7x54 and it did not fit, the round seemed to be too long.