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Reverse calculating software

 
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  #1  
Old 03-14-2009, 12:31 AM
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Reverse calculating software

Is there any Ballistic software that will reverse calulate.

If I enter my B.C. and Velocity and then go out to to range and shoot it to 500m. If I get a different drop at 500m I want to just enter that figure and have the software recalculate drop values at the intermediate distances.
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  #2  
Old 03-14-2009, 03:32 AM
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Re: Reverse calculating software

The easiest and most reliable way is to change the BC in the BC field in the software untill your computer matches your real drops. This is your real BC. It is typically different from published BC's.
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Old 03-14-2009, 04:02 AM
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Re: Reverse calculating software

Good answer, meichele! +2
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Our Lord Jesus said that as it was in the days of Noah and
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to this generation and we once more are rejecting it as was prophesied!!!

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  #4  
Old 03-14-2009, 04:30 AM
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Re: Reverse calculating software

Thanks people.

I was thinking there maybe software that I could enter muzzle velocity, zero 100m and drop at 500m and then it would adjust B.C. automatically.
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  #5  
Old 03-14-2009, 04:39 AM
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Re: Reverse calculating software

Exbal has the "Trajectory Validation" feature. shot your 500 yard target with the drops given if the POI is different then enter that number at 500 yards and Exbal will do the rest

Example if at 500 yards your drops are 3" lower than predicted enter -3" in the trajectory validation feature and the program will do the rest.
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Old 03-14-2009, 06:45 AM
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Re: Reverse calculating software

Will do the rest, meaning it will adjust the muzzle velocity to what velocity would be needed for the bullet to have dropped that many inches at whatever distance. So by adjusting the muzzle velocity instead of the BC it gets away with it. It's important though to remember that adjusting your BC is what will give you more accurate adjustments that will match your true bullet trajectory much closer specially at longer distances.
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-----------------------------
HEBREWS 13:8
Jesus Christ the same yesterday, and to day, and for ever.

Our Lord Jesus said that as it was in the days of Noah and
also as it was in the days of Lot so it shall be in the days...
It's happening again!!! God sent to us His prophet, and His Word
to this generation and we once more are rejecting it as was prophesied!!!

---> As promised, God Sent His Prophet to us!
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  #7  
Old 03-14-2009, 12:56 PM
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Re: Reverse calculating software

It's also important to have the proper muzzle velocity. I had this problem at 975 yards. I chronographed the 3338 Lapua and came up with 2820 FPS and I was consistently low at 975 yards I played with the BC a bit and was not getting satisfactory results. So I decided to recheck my zero and to rechronograph my load at the same time. This time I got 2791 FPS average and the problem was solved. Of course the programs trajectory validation had alredy predicted as much and I have no issues with my drops since. Just my experience..


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