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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Need help understanding why my ballistics calculator is doing this!!
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<blockquote data-quote="CRNA" data-source="post: 568553" data-attributes="member: 22495"><p>Well, the JBM calculator online will revert to the G7 profile. So, if I copied and pasted this data it would be data that was an incorrect dope for my rig. The way I got it to work in Ballistic was to use the G1 number and designate a G7 profile, which I know has to be wrong. I have checked and rechecked all of my atmospheric data and they were all correct. </p><p></p><p>Just a few more answers to questions that popped up throughout the thread:</p><p></p><p>My rig is a Savage with the Accustock and Accutrigger, McGowan SS match barrel in varmint contour (26"), Nightforce NXS 5.5-22X56 with Nightforce rings and base. </p><p></p><p>I know that 1100 yards is a loooong way. Would I even attempt to shoot an animal at that distance? No. This was more just for fun since the wind was fairly calm compared to most days at that shooting location. We usually shoot from 450yds-800yds. On light wind days it almost gets boring. There is no challenge to shooting 450yds. When we shoot at the silhouette torso targets at that distance, we are usually trying for headshots (about 4X5 inches). Would I shoot at an animal out to 700yds? You better believe it. The problem was just so pronounced at 1000-1120yds that it just didn't make sense. My shooting buddy hit the 1000+ target on the second try and then continued to ring it four more straight times with his .260. I fully expected the same results. In my opinion 4-5MOA error in elevation is massive. If I would have only shot a couple of times I would have chalked it up to updraft or something else, but this was repeatable for both distances. I shot twice at 1040 and my buddy said, "you are hitting near a patch of grass just above the target". I used my reticle to determine that I was about 5MOA off. I dialed down 5MOA and guess what.....HIT. Same thing happened with the farther target. </p><p></p><p>As I stated before, the only way I could possibly get the drops to come close to the actual POI was to either add 200FPS of MV, which is totally absurd. Or, to manipulate the BC numbers. </p><p></p><p>In short, I know that shot is difficult to make. I'm sure there are guys on here with tons more experience in long range shooting than me that could take me to school when it comes to slapping steel at that distance. It's just frustrating because in prior outings my ballistics calculator has been spot-on.</p></blockquote><p></p>
[QUOTE="CRNA, post: 568553, member: 22495"] Well, the JBM calculator online will revert to the G7 profile. So, if I copied and pasted this data it would be data that was an incorrect dope for my rig. The way I got it to work in Ballistic was to use the G1 number and designate a G7 profile, which I know has to be wrong. I have checked and rechecked all of my atmospheric data and they were all correct. Just a few more answers to questions that popped up throughout the thread: My rig is a Savage with the Accustock and Accutrigger, McGowan SS match barrel in varmint contour (26"), Nightforce NXS 5.5-22X56 with Nightforce rings and base. I know that 1100 yards is a loooong way. Would I even attempt to shoot an animal at that distance? No. This was more just for fun since the wind was fairly calm compared to most days at that shooting location. We usually shoot from 450yds-800yds. On light wind days it almost gets boring. There is no challenge to shooting 450yds. When we shoot at the silhouette torso targets at that distance, we are usually trying for headshots (about 4X5 inches). Would I shoot at an animal out to 700yds? You better believe it. The problem was just so pronounced at 1000-1120yds that it just didn't make sense. My shooting buddy hit the 1000+ target on the second try and then continued to ring it four more straight times with his .260. I fully expected the same results. In my opinion 4-5MOA error in elevation is massive. If I would have only shot a couple of times I would have chalked it up to updraft or something else, but this was repeatable for both distances. I shot twice at 1040 and my buddy said, "you are hitting near a patch of grass just above the target". I used my reticle to determine that I was about 5MOA off. I dialed down 5MOA and guess what.....HIT. Same thing happened with the farther target. As I stated before, the only way I could possibly get the drops to come close to the actual POI was to either add 200FPS of MV, which is totally absurd. Or, to manipulate the BC numbers. In short, I know that shot is difficult to make. I'm sure there are guys on here with tons more experience in long range shooting than me that could take me to school when it comes to slapping steel at that distance. It's just frustrating because in prior outings my ballistics calculator has been spot-on. [/QUOTE]
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Need help understanding why my ballistics calculator is doing this!!
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