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Discussion in 'Rifle Country' started by Joe Jackson, Jan 8, 2011.

  1. Joe Jackson

    Joe Jackson Member

    - I'm brand new so be jentle late last year I started reloading for the wildcat ruger m77 375-300 win mag. The case size is not much smaller than the 375 H and H but can it handle the same cup presser?
  2. jpwilly

    jpwilly Well-Known Member

    Call Ruger...

    I see 50K CUP listed in reloading data for 375 H&H as MAX and 60K PSI as MAX for the Ruger 375...So converting CUP to PSI they are nearly identical in Pressure MAX

    BUT I'm not familiar with the 375-300 wildcat

    I would work up handloads in typical safe way starting 10% low. I would not wan't to be shooting a 375-300 if it were to go KABOOM.

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