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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Kelbly rings/lapping
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<blockquote data-quote="daveosok" data-source="post: 59545"><p>If your using inserts that align the bore of the rings then your ok. Rings should be lapped if you suspect they do not line up perfectly. </p><p>I just purchased a Bat action. You can rest assured it is very accurate and striaght but the mounts and rings are a separate piece.</p><p>Its a little like when you chamber a barrel. Shilen makers of very high quality barrels even get there bores off center a few thousands. Whats a few thousands, well if your threads arent concentric with your bore then they will be off center consequently everything else will be off center. You wont find hardly any high quality gunsmith not indicating a barrel bore in to assure that the bore is centered not the outside diameter.</p><p>Same thing goes with rings and bases, why pay good money for the gun and the rings and the scope only to impart undue stresses on your scope and for those who are benchrest shooters your also imparting stresses into the action but this is to the extreme end of things.</p><p>I plan on making my own mounts and rings. Once I secure the mounts and rings the inside diameter will be left small and I will wire edm the correct diameter for a 30 mm tube. This wire edm will cut to within millionths thats 5 decimal places past the decimal and I will still lapp them to final dimensions.</p><p>The scopes also must be measured as they have tolerences and 1 inch or 30 mm could be 1 or 30 mm +/-.005 which would impart the wrong clamping action. </p><p>If the dia is to small then it will try and force the wings of the rings outwards and I suspect that this is a better condition than the diameter being bigger and the scope only contacting the bottom and top center of the rings creating a dangerous stress causing flat spots on the top and bottom of the scopes diameter and may cause the owner to over tighten to prohibit slippage.</p><p>I wont get my diameter perfect nothing ever is, but I mesure each of the scopes and make a lapping mandrel per diameter and use diamond lapping compound of 9 and 3.5 microns which takes a bit more time to lapp but leaves a superior finish and removes as little of the base material as needed for a smooth and centered finish.</p><p>This may sound over the top but I believe that whatever errors you can remove from your weapon the least you have to deal with when troubleshooting problems and propper scope mounting will allow one to search for other areas in the weapon that may cause inaccuracies. If it is extreme in the area of damage to the scope some scope manufactures may void the warentee due to owner neglect.</p><p>Just a suggestion but call one of the scope makers and ask them what they recommend it would be interesting to hear what they have to say anyway. /ubbthreads/images/graemlins/confused.gif</p><p>JM2C</p><p>Dave /ubbthreads/images/graemlins/wink.gif</p></blockquote><p></p>
[QUOTE="daveosok, post: 59545"] If your using inserts that align the bore of the rings then your ok. Rings should be lapped if you suspect they do not line up perfectly. I just purchased a Bat action. You can rest assured it is very accurate and striaght but the mounts and rings are a separate piece. Its a little like when you chamber a barrel. Shilen makers of very high quality barrels even get there bores off center a few thousands. Whats a few thousands, well if your threads arent concentric with your bore then they will be off center consequently everything else will be off center. You wont find hardly any high quality gunsmith not indicating a barrel bore in to assure that the bore is centered not the outside diameter. Same thing goes with rings and bases, why pay good money for the gun and the rings and the scope only to impart undue stresses on your scope and for those who are benchrest shooters your also imparting stresses into the action but this is to the extreme end of things. I plan on making my own mounts and rings. Once I secure the mounts and rings the inside diameter will be left small and I will wire edm the correct diameter for a 30 mm tube. This wire edm will cut to within millionths thats 5 decimal places past the decimal and I will still lapp them to final dimensions. The scopes also must be measured as they have tolerences and 1 inch or 30 mm could be 1 or 30 mm +/-.005 which would impart the wrong clamping action. If the dia is to small then it will try and force the wings of the rings outwards and I suspect that this is a better condition than the diameter being bigger and the scope only contacting the bottom and top center of the rings creating a dangerous stress causing flat spots on the top and bottom of the scopes diameter and may cause the owner to over tighten to prohibit slippage. I wont get my diameter perfect nothing ever is, but I mesure each of the scopes and make a lapping mandrel per diameter and use diamond lapping compound of 9 and 3.5 microns which takes a bit more time to lapp but leaves a superior finish and removes as little of the base material as needed for a smooth and centered finish. This may sound over the top but I believe that whatever errors you can remove from your weapon the least you have to deal with when troubleshooting problems and propper scope mounting will allow one to search for other areas in the weapon that may cause inaccuracies. If it is extreme in the area of damage to the scope some scope manufactures may void the warentee due to owner neglect. Just a suggestion but call one of the scope makers and ask them what they recommend it would be interesting to hear what they have to say anyway. [img]/ubbthreads/images/graemlins/confused.gif[/img] JM2C Dave [img]/ubbthreads/images/graemlins/wink.gif[/img] [/QUOTE]
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