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Thread: calculator able to predict projectile pass height over variuis distances

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  1. #1
    Big_Les
    Join Date
    Apr 2016
    Location
    new zealand , hastings
    Posts
    154

    Smile calculator able to predict projectile pass height over variuis distances

    I have a dilemma.

    The maximum range that i can sight my rifle into, is on a range that has shooting positions that end at a maximum distance of 368 mts . The "100 yd" position is actually at 91 metres .
    So my rifle is sighted in at 91 mts .
    I need to shoot to 600 mts
    what height above the bull ( on the 91 metre target ) should my projectile strike in its trajectory to a 600 mt distance target ?
    I can dial up the 600 mt range on my scope and for the projectile ( 175 gr eldx 7mm ) at 2950 ft/sec , the up is 51 clicks .
    the projectile then passes thru the 91 mt target . 33.5 cm above the bull .

    these things are true
    the target distance ( and zero distance ) is 91 mts .
    the projectile is 175 gr eldx , G7 0.3470 , L=39.8 mm ( in 7mm prc case )
    the velocity is measured at 2950 ft/sec
    the rifle is 7mm prc at 1:8 twist
    the weather is 20 cel , and no wind
    the altitude is 60 ft above sea level
    the humidity is 60%
    the scope is swarovoski z5 3.5-18 ( click value 0.7 cm or 1/4 inch )
    Strelock says 51 clicks up from 91 mt zero
    swarovski says 51 clicks as well
    the projectile strikes high at 33.5 cm above the bull on the 91 mt target when dialed up 51 clicks

    what calculator is available to enter the data i have , to confirm the apparent trajectory and strike on the 91 mt target, is likely correct for a strike on the 600 mt target ?

    cheers
    les

 

 

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