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Winchester 9mm Flat Base or Hollow Base - what's the significance?

Discussion in 'Handloading and Reloading' started by IMtheNRA, Feb 3, 2008.

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  1. IMtheNRA

    IMtheNRA Member

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    Both types of 115-grain bullets are being considered for blasting ammo. Why are there two types of bases? Any difference in performance or load data? Should I care about this difference in bullet construction? :confused:
     
  2. Walkalong

    Walkalong Moderator

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    Load em both the same. Blast away. Have fun. :)

    W-231, AA #5, WSF, & N330 have all done very well by me for 115 Grain blasting loads.
     
  3. sublimaze41

    sublimaze41 Member

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    I just loaded 2,500 of 'em. I used AA#7 @8.3 grains. Accurate, nice FPS, feeds like butter. I case gauged every round using once fired brass, I would say 99.8% were fine. That is a fair priced FMJ. Since Rainier have raised their price I have made my move to these.
     
  4. Crimp

    Crimp Member

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    Dec 4, 2006
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    I wonder if the hollow bases would obturate better with a light target load? I've been using Win 115gr JHPs and the flat base 124gr FMJs for awhile now and am very happy with them. I notice TJ Conevera is out of stock and I'm wondering where is the best price for them these days.
     
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