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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
BEWARE, Problems with Exbal and G7 BC's
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<blockquote data-quote="ericpetritz" data-source="post: 447909" data-attributes="member: 5958"><p>I just received an email from Mr. Perry at Exbal and he found some problems with the software. I am not sure if he has been reading this thread but he finally looked into it (I mean this in the best possible way--I too am a stubborn professional engineer!). He sent me an updated version of the software which I just finished loading and testing. First of all, he fixed the problem of the software not retaing the G7 BC when it is saved and reopened--this is very nice! </p><p></p><p>Second, he made some changes to the G7 calculation. He did not let me know all of the specifics of these changes but I can say that the software is producing vastly different results now. For all the same conditions listed in my first post, I am now finding trajectories of -447.3" at 1000 yards. It does not matter if I use the measured density altitude or the measured temperature, station pressure, relative humidity, and actual altitude--I still get a trajectory of -447.3. While this is much closer than the numbers I was getting before, it is still an approximately 17" variation from the other programs using G7 BC's and the calculation using the Sierra G1 BC's. I am not sure which one is most accurate--I will have to do some more shooting at the range to determine.</p><p></p><p>To all the Exbal users: get the newest version of the software if you will be using G7 BC's. After trying it please let us know how accurate it is for you.</p><p></p><p></p><p>Eric</p></blockquote><p></p>
[QUOTE="ericpetritz, post: 447909, member: 5958"] I just received an email from Mr. Perry at Exbal and he found some problems with the software. I am not sure if he has been reading this thread but he finally looked into it (I mean this in the best possible way--I too am a stubborn professional engineer!). He sent me an updated version of the software which I just finished loading and testing. First of all, he fixed the problem of the software not retaing the G7 BC when it is saved and reopened--this is very nice! Second, he made some changes to the G7 calculation. He did not let me know all of the specifics of these changes but I can say that the software is producing vastly different results now. For all the same conditions listed in my first post, I am now finding trajectories of -447.3" at 1000 yards. It does not matter if I use the measured density altitude or the measured temperature, station pressure, relative humidity, and actual altitude--I still get a trajectory of -447.3. While this is much closer than the numbers I was getting before, it is still an approximately 17" variation from the other programs using G7 BC's and the calculation using the Sierra G1 BC's. I am not sure which one is most accurate--I will have to do some more shooting at the range to determine. To all the Exbal users: get the newest version of the software if you will be using G7 BC's. After trying it please let us know how accurate it is for you. Eric [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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BEWARE, Problems with Exbal and G7 BC's
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