Drop chart

TroyMN

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Full Member
Minuteman
Feb 5, 2012
56
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Minnesota
Why would my balistic calculator be correct at 100,500,525, but be 1.5 MOA off at 300? Calculator=4.4 MOA actual 6.0?
175 smk @2640
app is mildot ballistic, but same info came from another cal on-line.
 
Yes JBM showed very similar numbers at close and midrange. I have my data in front of me now and it is
-4.41@300 act=-5.5
-11.2 [MENTION=80736]500[/MENTION] act = -11.6
The scope height is within .1" The results are from multiple days summer/winter and multiple ranges, several shot groups (using posted yardages, my LRF is not 500 capable) The scope tracking was verified to be correct when purchased less than 2 years ago

Atmospheric condition at the shorter ranges tend to change the 500+ dope but that is not the one I am having trouble with.
I have played with the numbers (away from the measured data) to see if I could duplicate the actual drop. I could not find an input that would duplicate range results. 175 smk @2640 Scope height 2.1" <---this is the guts of it you want to try your calculator. Yes my Chrono could be giving incorrect data....but the trajectory does not seem logical. we have 4+ verified data points on the arc
0 @-2.1"
100 @ 0"
300 @ -5.5"
500 @-11.6"
525 @-12.0"
Can any one get a 175 SMK to duplicate the data about by changing any of the inputs?
 
Why would my balistic calculator be correct at 100,500,525, but be 1.5 MOA off at 300?

not an attempt of pooing on your thread:

much like a sequel to a meatloaf song, "3 out of 4 ain't bad". i know quirks can sometimes drive you crazy, and would like resolution to the "why"....but you have 3 accurate data points and the fourth one is confirmed in reality, add it to the chart and move on.

no matter how good the calculator, it's still a "guide" in virtual reality, not 100% reliable in reality. in a perfect world i should be bill gates' heir, but unable to cash the check as i am on motley crues' farewell tour as mick mars back up guitarist.