Help Me Understand Grains

Discussion in 'General Firearms Forum' started by OutdoorsyDave, Aug 5, 2020.

  1. Jim Watson

    Jim Watson

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    George Luger and DWM thought 8 grams (123.4 grains) was best.

    I like the FEEL of 147 "subsonic" but have turned up some guns not fully reliable with it, so I am loading and shooting 124s.

    115 grain bullets are 6 1/4% lighter than 124s therefore cheaper if you are making them by the millions for sale or to equip an army.
     
  2. illrooster132

    illrooster132

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    Dang it !!!. now I'm more confused, thanx everyone. I'll take some of that grain alcohol to help me make sense .
     
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  3. G26-Has-my-6

    G26-Has-my-6

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    Well, once upon a time, way back in 1975, the US government tried to encourage the nation to adopt the metric system. The nation rejected this.

    So, here we are, still using inches, lbs, miles, and yes, grains.
     
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  4. Trench Sweeper

    Trench Sweeper On the day of your birth death began stalking you

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    You're welcome lol and rice wine is better.
     
  5. cciman

    cciman MacGyver

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    Not always so clearcut. Be careful what you believe. Most range ammo is 115, and most "tactical" "duty" "self defense" "magic killing" ammo is 124 or 147.
    KE=0.5(MV^2) or kinetic energy (muzzle energy) = one half x mass x (velocity squared)

    So small changes in velocity of the round has much greater effect than similar changes in the mass. So a 115 bullet needs to only travel 3 ft/sec more than the 124 bullet to equal its energy.
    The "muzzle energy numbers" that are published for many of these rounds, if the velocity is published, sometimes don't make sense, and violate the known laws of physics, likely in favor of marketing and making more money on "defensive" ammo sales.

    If you miss, it does not matter what you use.
     
  6. boilergonzo

    boilergonzo

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    But how many nanogallons are in a teaspoon?!?
     
  7. Doc Holliday

    Doc Holliday CLM

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    You think that's bad? Go overseas and order some 'grams' of vodka...try figuring that out while they're impatiently waiting to take your order...
     
  8. BigMoneyGrip

    BigMoneyGrip

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    For smokin' at the range, I'd shoot whatever was the cheapest. For a defensive round, I think more is better. You will notice that in general, the lighter bullet is "snappier" than the heavier bullet. In this day, don't be picky and buy what you can!