How do you work out the rate of bullet drop

Discussion in 'General Rifle Discussion' started by phammily, Sep 30, 2011.

  1. phammily

    phammily New Member

    29
    0
    0
    Hey just wondering what's the equation for working out the rate of a bullet drop over x amount of yards, to adjust scope to each shot at different distance. Thank you
     
  2. dks7895

    dks7895 New Member

    474
    0
    0

  3. phammily

    phammily New Member

    29
    0
    0
    Where can I get one
     
  4. danf_fl

    danf_fl Retired Supporter

    12,369
    57
    48
  5. phammily

    phammily New Member

    29
    0
    0
    So there no way you can do it with pen a paper
     
  6. c3shooter

    c3shooter Administrator Staff Member

    21,453
    587
    113
    There is no one standard "drop"

    The amount that a bullet drops in X distance will be determined by the speed of the bullet.

    Speed is determined by starting speed, and how much that speed degrades over distance- which will be determined by the drag created by a bullet THAT shape creates. Usually referred to as the ballistic coefficent of that bullet.

    Of course, ALL bullets begin to fall towards the earth the instant they are fired (except bullets fired UP). They all fall at 32 ft per second per second. The quicker it gets there, and the better the BC, the less the drop. Yes can be done on paper (a slide rule would be better) but you will need a LOT of paper- it is not a simple math substitution type formula.

    Makers have worked out paper tables to calculate drop and energy- and now have on line ballistic calculators. Military uses a small computer on the firearm for very long range work.

    Suggest you run your calcs, print relevant parts, attach to stock with a couple of rubber bands.
     
  7. phammily

    phammily New Member

    29
    0
    0
    Now I under stand a bit more