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Precision Scope Mounting For The Working Rifle
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<blockquote data-quote="DMP25-06" data-source="post: 1564404" data-attributes="member: 27271"><p>After reading this article , I presume that this epoxy bedding would prevent my scope from moving slightly forward from recoil of a .340 Weatherby Magnum . </p><p>My rifle would shoot the first 2 shots into same hole at 200 yards and then the group would begin opening up more on each following shot . I was baffled , checking base first , then rings for proper torque , mounting another scope , re-zeroing , and then getting the exact same results . I checked stock bedding , barrel free-float clearance , and weighing all reloading components exactly . Still the same results .</p><p>Then I got the idea of checking for scope slippage in the rings . Using a pencil , I marked the scope tube at front and rear of each ring to check for movement . After firing 6 - 8 shots , and watching the shot grouping open , I looked at my marks on the scope tube and found that the scope had moved .050" or slightly more forward from it's original location . </p><p>Weatherby Mark V action , Near Mfg. one piece 25 MOA rail , Leupold Mark IV rings , and Leupold Mark IV 4.5 - 14 x 40 LRT , 30mm tube scope with weight at 19 oz. , if I am correct in remembering Leupold specs . Douglas Premium XX barrel with Holland muzzle brake . Overall weight of rifle/scope combo is 10 pounds . 250 gr. bullet @ 3020 FPS ( Magnetospeed ).</p><p>Would this slight amount of movement change the point of impact noticeably ?</p></blockquote><p></p>
[QUOTE="DMP25-06, post: 1564404, member: 27271"] After reading this article , I presume that this epoxy bedding would prevent my scope from moving slightly forward from recoil of a .340 Weatherby Magnum . My rifle would shoot the first 2 shots into same hole at 200 yards and then the group would begin opening up more on each following shot . I was baffled , checking base first , then rings for proper torque , mounting another scope , re-zeroing , and then getting the exact same results . I checked stock bedding , barrel free-float clearance , and weighing all reloading components exactly . Still the same results . Then I got the idea of checking for scope slippage in the rings . Using a pencil , I marked the scope tube at front and rear of each ring to check for movement . After firing 6 - 8 shots , and watching the shot grouping open , I looked at my marks on the scope tube and found that the scope had moved .050" or slightly more forward from it's original location . Weatherby Mark V action , Near Mfg. one piece 25 MOA rail , Leupold Mark IV rings , and Leupold Mark IV 4.5 - 14 x 40 LRT , 30mm tube scope with weight at 19 oz. , if I am correct in remembering Leupold specs . Douglas Premium XX barrel with Holland muzzle brake . Overall weight of rifle/scope combo is 10 pounds . 250 gr. bullet @ 3020 FPS ( Magnetospeed ). Would this slight amount of movement change the point of impact noticeably ? [/QUOTE]
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