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Long Range Hunting & Shooting
Chronograph?
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<blockquote data-quote="Greyfox" data-source="post: 555496" data-attributes="member: 10291"><p>I have had the same experience and do the same to build a BDC. The actual drops usually don't match up to the program output when I start getting much farther out than 500 yards. What I have been trying to do and would like feedback on is useing the chronograph to establish a reference point for an optimum load. Once I have my actual drops and have built my turret, I then keep a supply of those loads with the my actual measured velocity which may not match a ballistic program but they are very consistent and hit where they are supposed to. If I then get a different lot of powder that produces a velocity that is different than my original lot, or even try to change to a different powder, could I replicate my oriiginal drop data if I adjust the powder to match the velocity of my original standard load. All other components, bullet, primer, brass, etc. would be unchanged. I have done a little experimentation with this by actual testing on the range, and it seems to work but would like to know if anyone has tried this.</p></blockquote><p></p>
[QUOTE="Greyfox, post: 555496, member: 10291"] I have had the same experience and do the same to build a BDC. The actual drops usually don't match up to the program output when I start getting much farther out than 500 yards. What I have been trying to do and would like feedback on is useing the chronograph to establish a reference point for an optimum load. Once I have my actual drops and have built my turret, I then keep a supply of those loads with the my actual measured velocity which may not match a ballistic program but they are very consistent and hit where they are supposed to. If I then get a different lot of powder that produces a velocity that is different than my original lot, or even try to change to a different powder, could I replicate my oriiginal drop data if I adjust the powder to match the velocity of my original standard load. All other components, bullet, primer, brass, etc. would be unchanged. I have done a little experimentation with this by actual testing on the range, and it seems to work but would like to know if anyone has tried this. [/QUOTE]
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