max speed for 25 BNH cast bullet?
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  1. #1
    Deadeye
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    max speed for 25 BNH cast bullet?

    Hi,

    I'm wondering how fast (leading, accuracy, and other problems aside) I can expect to be able to drive a 405gr cast bullet with BNH of 25 without having it fragment upon hitting something tough like a big bear bone.

    Unfortunately I don't know the exact alloy, just the hardness. I do know that they hardly deform when I beat on them with a framing hammer :-)

    Anyone have any experiences with what the upper limit of this bullet might be?

    Chris.

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    Site Sponsor/Site Contributor Gun Wizard
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    max speed for 25 BNH cast bullet?

    I don't think you could push them fast enough from the 45-70 to worry about. They will hang together from my experience.

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    Marlin Marksman
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    max speed for 25 BNH cast bullet?

    25 seems pretty hard. I think that's what Garrett claims. They claim some special alloy blend, any idea what it is to make them that hard, AND stay together?
    While all the oil may be in Texas, ALL the dipstics are in "DC, and Sacramento"

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    Really Short Fuse Administrator
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    max speed for 25 BNH cast bullet?

    Most likely arsenic and heat treating. BTB are that way also.

    Dave
    http://smg.photobucket.com/albums/v354/vtdw1/
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    Marlin Marksman
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    max speed for 25 BNH cast bullet?

    I'm still a total greenhorn at this casting stuff, and I know lead is toxic if ingested, but isn't arsenic a poison?

    Is it added in powder form, or solid? Where do you get it and what's it's purpose in casting?
    While all the oil may be in Texas, ALL the dipstics are in "DC, and Sacramento"

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    Oz
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    max speed for 25 BNH cast bullet?

    It's a heavy metal
    Mark.
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    max speed for 25 BNH cast bullet?

    Quote Originally Posted by VTDW
    Most likely arsenic and heat treating. BTB are that way also.Dave
    Are you saying Beartooth® Cast Boolits have a hardness of 25?
    David ("Feo, Fuerte y Formal")
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    Marlin Marksman
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    max speed for 25 BNH cast bullet?

    Quote Originally Posted by Oz
    It's a heavy metal
    Mark.
    Where do you get it?
    While all the oil may be in Texas, ALL the dipstics are in "DC, and Sacramento"

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    max speed for 25 BNH cast bullet?

    can someone tell me how to post a picture

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    Really Short Fuse Administrator
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    max speed for 25 BNH cast bullet?

    Dawei,

    This is from Marshall's site:

    All of our bullets are hand-cast then heat-treated to a BHN 21+, the same hardness of straight linotype alloy. These bullets have a lower antimony content than linotype however, which results in a bullet which isn't as brittle, having a more ductile quality resulting in superior energy transfer on steel and live targets. I could have sworn I read on his site that the hardness was higher. ops: I also suspect arsenic is how he achieves the heat treated hardness.

    Cowboy, go to the Reference Material Forum and there is a good set of directions there. If you cannot quite figure it out, send em to me and I'll be more than happy to post em for you.

    Dave
    http://smg.photobucket.com/albums/v354/vtdw1/
    MO Member #77


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