meplat vs bullet weight

Discussion in 'Ammunition & Reloading' started by lonewolf101, Nov 24, 2011.

  1. lonewolf101

    lonewolf101 New Member

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    I'm set as far as having a hunting bullet goes I pick the 405 hard cast.Now I'm am wondering if a lighter bullet 350 with a wider.370 meplat would be better at killing then a 405 with alittle smaller meplat .303.The differance would only be .067 I dont know if that would be worth it the 405 has more weight then the 350 so would that work in the 405 favor? or would the wide meplat kill better?.


    deer and boar.
     
  2. JonM

    JonM Moderator

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    i assume your talking .458 diameter bullets. i use 350 gran round nose soft points for hunting. with 45 cal rifles i dont think it really matters unless your hunting dangerous game in africa. any of the 458's are more than enough for anything that walks on this side of the globe
     

  3. lonewolf101

    lonewolf101 New Member

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    I should of said it for my 45/70 - thats what I was thinking the 405 is about 1" of hard cast lead going into a 130lb or so deer. I'm using .459dia but I will slug it to make sure! dont want the bullet to wobble.
     
    Last edited: Nov 24, 2011
  4. JonM

    JonM Moderator

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    either work wonders on deer and hogs.
     
  5. robocop10mm

    robocop10mm Lifetime Supporting Member Lifetime Supporter

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    It starts out larger than an expanded .30 caliber rifle bullet. I use a 340 gr hard cast in my .45-70. Decent meplat and 2100 fps. I feel very comfortable in the lower 48 with this. I might consider a 405 for Alaska. You can only kill them dead, no more.
     
  6. lonewolf101

    lonewolf101 New Member

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    LOL yeah dead is dead cant kill em any deader.
     
  7. res45

    res45 New Member

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    In Veral Smith book "Jacketed Performance with Cast Bullets" he has a formula to use to figure out the relative wound channel that a particular dia. meplat will produce at a given velocity.

    Basically it goes: Velocity times meplat width in thousandths of an inch, divided by 4. Ideal DV displacement velocity range for big game is 100 to 125, with 130 at the very max for fastest kills.

    My Lee 30-30 RNFP bullet has a much smaller meplat the several other cast 30-30 hunting bullet but it DV is around 105 and it works fine on deer size game,anything larger caliber wise than my 30 cal. bullet is going to work just fine.
     
  8. lonewolf101

    lonewolf101 New Member

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    I was looking at that today at beartooth site. Beartooth Bullets > Ballistician's Corner > Permanent Wound Channel
     
  9. res45

    res45 New Member

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    I don't remember the meplat size on my 30 cal. Lee 170 gr. bullet,have to remeasure it but the wound channel through the vitals was just over 1" when I calculated it awhile back.

    Suffice to say I'm sure either of your bullet will do the job at appropriate ranges and with good bullet placement,there might be a slight trade off between the two weights vs. meplat size but unless your pushing the bullets to it's extremes I dough you will notice much difference.

    I'm not learned enough at this point to know all the fine details of how meplat size vs. different weight and velocity differences affect bullets performance on game. All I know is my gas checked 170 gr. FN bullet cast from WW alloy and fired at 2000+ fps. out of my 30-30 kills a deer just as dead as any jacketed SP I've ever used and it leaves a big hole.

    I have Verals book on my Christmas wish list from what I've read it explains a lot of this in detail that's simple to understand and apply.
     
    Last edited: Nov 27, 2011