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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Advice on scope bases....
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<blockquote data-quote="Ian M" data-source="post: 14735" data-attributes="member: 25"><p>A rail mount elliminates concern about the fact that factories frequently cannot drill and tap four holes in a straight line. This may be from sloppy workmanship and I have been told that it can also result from manufacturing stresses induced when major cutouts are made in the reciever. This results in rings not being true, they do not line up with the centerline of the bore or they are wonky and torque hell out of the scope body. That is why we sometimes get nasty ringmarks on the scope body when we take the scope out of a set of rings. Solution can be shimmable rings (Burris) and lapping.</p><p>The mounting holes in rails are somewhat oblong to accomodate the sloppily located holes, and the top deck is usually machined to very tight tolerances - good enough that the scope will return to zero if it is removed and properly re-installed.</p><p>Besides the above the rail can provide varying degrees of elevation, 20moa is usually the average - can go to 60moa or so. This is a real asset for long range shooting.</p><p>Main suppliers of rails are Richard Near and Badger Ordnance - both make very nice products. Leupold also makes one-piece MK4 rails, without the Picatinny spec slots.</p><p>Rails also enable the user to switch pre-zeroed scopes, install tactical gear such as night vision and as mention, to remove and replace scopes with great precision.</p><p>Like a lot of things, they are very expensive but very nice to have.</p></blockquote><p></p>
[QUOTE="Ian M, post: 14735, member: 25"] A rail mount elliminates concern about the fact that factories frequently cannot drill and tap four holes in a straight line. This may be from sloppy workmanship and I have been told that it can also result from manufacturing stresses induced when major cutouts are made in the reciever. This results in rings not being true, they do not line up with the centerline of the bore or they are wonky and torque hell out of the scope body. That is why we sometimes get nasty ringmarks on the scope body when we take the scope out of a set of rings. Solution can be shimmable rings (Burris) and lapping. The mounting holes in rails are somewhat oblong to accomodate the sloppily located holes, and the top deck is usually machined to very tight tolerances - good enough that the scope will return to zero if it is removed and properly re-installed. Besides the above the rail can provide varying degrees of elevation, 20moa is usually the average - can go to 60moa or so. This is a real asset for long range shooting. Main suppliers of rails are Richard Near and Badger Ordnance - both make very nice products. Leupold also makes one-piece MK4 rails, without the Picatinny spec slots. Rails also enable the user to switch pre-zeroed scopes, install tactical gear such as night vision and as mention, to remove and replace scopes with great precision. Like a lot of things, they are very expensive but very nice to have. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Advice on scope bases....
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