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Long Range Hunting & Shooting
losing elevation when dialing
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<blockquote data-quote="Greyfox" data-source="post: 695278" data-attributes="member: 10291"><p>It sounds like it could be a scope issue. I have seen this type of effect when the scope is mounted so it is using the high end of the scope's elevation range, the turrets work, click, etc, but the scope does not track accurately and can actually repaet an elevation error consistantly. The scope will return to zero under this condition, but still have a problem. This can also happen if the elevator spring is defective, even if the scope is operating in the normal range. A good way to check this is to use a scope collimator with an MOA grid and examine the movement up and down your elevation range. If there is a problem, with this, or anything else involving scope tracking movements you will usually see it. At the very least, you can rule this issue out. 2.5MOA is a big shift, unlike to be caused by temperature or air density at 500 yards. The other thing that could cause this would be an ammo change. My son in law had this happen when he unknowingly loaded a couple of dozen reloads that had light powder charges by a couple of grains. This can also produce similar symptoms as the OP is seeing.</p></blockquote><p></p>
[QUOTE="Greyfox, post: 695278, member: 10291"] It sounds like it could be a scope issue. I have seen this type of effect when the scope is mounted so it is using the high end of the scope's elevation range, the turrets work, click, etc, but the scope does not track accurately and can actually repaet an elevation error consistantly. The scope will return to zero under this condition, but still have a problem. This can also happen if the elevator spring is defective, even if the scope is operating in the normal range. A good way to check this is to use a scope collimator with an MOA grid and examine the movement up and down your elevation range. If there is a problem, with this, or anything else involving scope tracking movements you will usually see it. At the very least, you can rule this issue out. 2.5MOA is a big shift, unlike to be caused by temperature or air density at 500 yards. The other thing that could cause this would be an ammo change. My son in law had this happen when he unknowingly loaded a couple of dozen reloads that had light powder charges by a couple of grains. This can also produce similar symptoms as the OP is seeing. [/QUOTE]
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losing elevation when dialing
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