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AverageJoe

Ballistic data comparison

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Curious how many different yardages / moa we will all come up with with the following data. I have seen a big discrepancy between the differnet apps and software.

 

Post your 650 yd results in moa and inches of drop

 

-.308 180 gn accubond . factory bc of .507

-2900 fps

-100 yd zero

-5500 ft elevation

-60 degrees

-60 percent humidity

-site height 1.5"

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Using the older Berger Bullet calculator I am getting 13.3 MOA / 90.50" of drop at 650 Yards using the above-listed conditions.

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Using isnipe i get two different answers depending on which time i log on lol. 13.25 moa and 13.38 moa.

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Very interesting! Great idea to compare the different apps........

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and We wonder why We hear people shoot 10 times

 

I wish more people understood the EXTREME importance of verifying their balistic data in real world hunting situations. Almost all balistic calculators will need to be tweeked a little or a lot.

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So just based on the limited responses so far we have more than 1 moa of deviation. At 650 yds that is almost 7" off.

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So just based on the limited responses so far we have more than 1 moa of deviation. At 650 yds that is almost 7" off.

 

This is why I use an app to get me close and why I always shoot from 200 yards to 1000 in varying conditions to verify what my rifle is actually doing. Nothing beats actual shot and recorded data.

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Using the applied ballistics calculator and using the g7 ballistics of that bullet as well as a 1 in 10 twist barrel I got this.

13.65 moa

92.91" of drop

 

Using the factory G1 BC you posted I got this.

13.5 moa

91.90" of drop

 

Pretty interesting to see the variations. Totally agree with verifying data by shooting these ranges.

GSeven has a calculator that you can use then you also input your results after shooting at the range and it gives you a "true muzzle velocity" that helps match your actual drop curve.

Just in case you weren't aware of that already.

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I got slightly different on Shooter but very close and did notice if I play with turning on and off Coriolis and spin drift it changes 3-4 inches and 0.1 MOA.

 

G7 vs G1 is obviously a little different even as a starting place. A few other variables available as well depending on the program.

 

I agree with all of the other assessment, you gotta shoot it at some point!

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I got 13.1 MOA using LITZ BC, 29.5" for barometric pressure and the 5500' elevation.

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