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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ballistic mystery, would like your thoughts.....
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<blockquote data-quote="Jeff In TX" data-source="post: 159515" data-attributes="member: 1522"><p>Kirby,</p><p></p><p>Sorry I forgot to add this to my post last evening. This is huge and something almost no one has figured out when it comes to ballistic programs and trying to get them to match your actual shooting data at all yardage increments, not just a couple.</p><p></p><p>I'm assuming you're shooting tapered scope bases to reach out to 2 and 3 grand worth of realistate? If so then the value that you're using for your scope height will be incorrect assuming you measured your actual scope height, which I know you did. Scope height on ballistic programs is only accurate if the scope is parallel to the bore. If not, if not, all bets are off and it's one of those values that must be messaged for accurate results especially for ranges beyond 500 yards.</p><p></p><p>I've been able to completely reverse engineer my ballistic program to match actual .308 shooting data to with less than .25 moa at 1000 yards no matter what conditions I shoot in. It matches every hundred increment out to a grand dead nuts on. This was an anal pain staking indever, but in the end once I had all my actual shooting data, it was the scope height setting that set me free and allowed to me match my actual data. But you still can't use the G1 drag model; it will never get you close. Believe me, I've tried a bunch of ballistic programs using G1 with all my data and they were completely useless. Someday someone else will figure this out with these programs are useless and quit offering the G1 drag model as an option!</p><p></p><p>I'll do a post on reverse engineering a ballistic program if I get some time today or tomorrow.</p><p></p><p>Shoot me an email with your number and I'll be glad to explain how I figured this out and what I did.</p></blockquote><p></p>
[QUOTE="Jeff In TX, post: 159515, member: 1522"] Kirby, Sorry I forgot to add this to my post last evening. This is huge and something almost no one has figured out when it comes to ballistic programs and trying to get them to match your actual shooting data at all yardage increments, not just a couple. I'm assuming you’re shooting tapered scope bases to reach out to 2 and 3 grand worth of realistate? If so then the value that you’re using for your scope height will be incorrect assuming you measured your actual scope height, which I know you did. Scope height on ballistic programs is only accurate if the scope is parallel to the bore. If not, if not, all bets are off and it’s one of those values that must be messaged for accurate results especially for ranges beyond 500 yards. I’ve been able to completely reverse engineer my ballistic program to match actual .308 shooting data to with less than .25 moa at 1000 yards no matter what conditions I shoot in. It matches every hundred increment out to a grand dead nuts on. This was an anal pain staking indever, but in the end once I had all my actual shooting data, it was the scope height setting that set me free and allowed to me match my actual data. But you still can't use the G1 drag model; it will never get you close. Believe me, I've tried a bunch of ballistic programs using G1 with all my data and they were completely useless. Someday someone else will figure this out with these programs are useless and quit offering the G1 drag model as an option! I’ll do a post on reverse engineering a ballistic program if I get some time today or tomorrow. Shoot me an email with your number and I’ll be glad to explain how I figured this out and what I did. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ballistic mystery, would like your thoughts.....
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