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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Scope leveling
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<blockquote data-quote="Mikecr" data-source="post: 1463033" data-attributes="member: 1521"><p>It would be fine provided you shoot the gun at 45deg -as you set the level.</p><p>The horizontal offset in POA to bore here does not matter for fixed range competitors, and can be windage preset out at furthest range for hunters. Let's say a 45deg offset with your scope height at 1.5", and furthest shooting decided at 600yds. You would dial shots in at 600yd, leading to a slight windage offset. Now back at 300yds you'd see maybe 1/4" horizontal error, at 100yds maybe 3/8" offset.</p><p>You would also need to carefully measure 45deg resultant scope height from bore centerline, to enter this in your ballistic software.</p><p></p><p>45deg is an extreme of coarse, affecting both horizontal and vertical scope position. But even that can be managed just fine.</p><p>In contrast, reasonable field errors with a system set perfectly vertically plumb, but then failing to meet level setting, would likely be up to ~5deg in a hilly topography. At 600yds and this much error, you will miss groundhogs.</p><p>It's a way bigger error to disregard level than to live with offsets. This is because we're now talking about angular errors which manifest as ever bigger offsets downrange.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1463033, member: 1521"] It would be fine provided you shoot the gun at 45deg -as you set the level. The horizontal offset in POA to bore here does not matter for fixed range competitors, and can be windage preset out at furthest range for hunters. Let's say a 45deg offset with your scope height at 1.5", and furthest shooting decided at 600yds. You would dial shots in at 600yd, leading to a slight windage offset. Now back at 300yds you'd see maybe 1/4" horizontal error, at 100yds maybe 3/8" offset. You would also need to carefully measure 45deg resultant scope height from bore centerline, to enter this in your ballistic software. 45deg is an extreme of coarse, affecting both horizontal and vertical scope position. But even that can be managed just fine. In contrast, reasonable field errors with a system set perfectly vertically plumb, but then failing to meet level setting, would likely be up to ~5deg in a hilly topography. At 600yds and this much error, you will miss groundhogs. It's a way bigger error to disregard level than to live with offsets. This is because we're now talking about angular errors which manifest as ever bigger offsets downrange. [/QUOTE]
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Scope leveling
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