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Aluminum tipped 350 grain SMKs - was someone doing this?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by montana_native, Nov 18, 2014.


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  1. Nov 18, 2014 #1
    montana_native

    montana_native Well-Known Member

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    I thought I read on this site that the 375 cal SMK was being combined with a Corbin aluminum tip with quite a bit of success, especially regarding an increase in BC. Does anyone have information on this?

    Thanks.
     
  2. Nov 18, 2014 #2
    royinidaho

    royinidaho Well-Known Member

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    Kirby has been messing with them.

    I'm making my own brass tips for the 350 SMK

    I don't know of any bc info yet as most efforts have been directed on determining how much "run out" is tolerable.

    Richard Graves did a ton of work and voiced the opinion that run out tolerance could be quite large with pleasing results at distance.

    Here results of my initial test.
     

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  3. Nov 19, 2014 #3
    buckbrush

    buckbrush Well-Known Member

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    That's three shots with what you culled out and measured as the worst runout?
     
  4. Nov 19, 2014 #4
    BountyHunter

    BountyHunter Well-Known Member

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    Dave Tooley messed with aluminum and plastic tips for a couple years. Google Tooley custom rifles
     
  5. Nov 20, 2014 #5
    royinidaho

    royinidaho Well-Known Member

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    Yep...
     
  6. Nov 21, 2014 #6
    buckbrush

    buckbrush Well-Known Member

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    That seems reasonable. Have you compared to those that you found to have minimal runout to see if there is an appreciable difference?
     
  7. Nov 21, 2014 #7
    royinidaho

    royinidaho Well-Known Member

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    Not yet... I doubt I'm going to worry too much about it. As my skills with the lathe improve and I learn a bit more about press fit tolerances run out will get better.

    I can't, at the moment, find Kirby's post regarding wobble. He reported the culls shot, I'm guessing here, maybe a couple of inches larger group @ 1000 over the more straight ones. Everything was well under MOA, I believe...