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Long Range Hunting & Shooting
Vertical stringing---Causes?
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<blockquote data-quote="specweldtom" data-source="post: 140072" data-attributes="member: 2580"><p>If I read right, you're stringing 3/4 moa vertical. That isn't real bad for a high performance round, but is very discouraging. Are you are deburring the flash holes in your brass? Doing so has reduced vertical stringing on the few rifles that I have done it for, from 7-08 to 338x378. If it's Norma brass, it usually has good holes, but not perfect. Also, is the bottom surface of the recoil lug clearanced off the bedding? The location of the Remington front action screw can make a fulcrum out of the bottom of the lug. Additionally, if any part of the screws touches the bore of the pillars, it can make the rifle a little squirrely, usually not just vertical tho.</p><p>As a last resort, you might try re-crowning in very small increments, but I don't recommend it for vertical stringing until nothing else has worked.</p><p></p><p>I would be very very cautious about moving the bullet out. I like to load magazine length ammo that is hot, and let the freebore work.</p><p></p><p>I will be watching this thread with interest, because I have experienced 4-5 to 1 vertical dispersion too. I hesitated to post because some heavy hitters are already on the case. Let us know what works.</p><p></p><p>Have fun, Tom</p></blockquote><p></p>
[QUOTE="specweldtom, post: 140072, member: 2580"] If I read right, you're stringing 3/4 moa vertical. That isn't real bad for a high performance round, but is very discouraging. Are you are deburring the flash holes in your brass? Doing so has reduced vertical stringing on the few rifles that I have done it for, from 7-08 to 338x378. If it's Norma brass, it usually has good holes, but not perfect. Also, is the bottom surface of the recoil lug clearanced off the bedding? The location of the Remington front action screw can make a fulcrum out of the bottom of the lug. Additionally, if any part of the screws touches the bore of the pillars, it can make the rifle a little squirrely, usually not just vertical tho. As a last resort, you might try re-crowning in very small increments, but I don't recommend it for vertical stringing until nothing else has worked. I would be very very cautious about moving the bullet out. I like to load magazine length ammo that is hot, and let the freebore work. I will be watching this thread with interest, because I have experienced 4-5 to 1 vertical dispersion too. I hesitated to post because some heavy hitters are already on the case. Let us know what works. Have fun, Tom [/QUOTE]
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Vertical stringing---Causes?
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