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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Need some help troubleshooting horizontal grouping.
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<blockquote data-quote="BillNye" data-source="post: 2807679" data-attributes="member: 114642"><p>I am working with a newly built rifle, all quality components with a Nightforce ATACR scope in Hawkins rings. The barrel has been fully broken in, 150 rounds through it fireforming brass. I put together a few loads for it with Hammer Hunters and Berger hybrids, ADG brass, and H1000. I have no reason to think the loads are an issue. </p><p></p><p>Consistently, with every load tested, I am getting minimal vertical dispersion and extreme horizontal dispersion. Approximately 2-2.5 MOA horizontal and 0.3-0.6 MOA vertical. It repeats this pattern at multiple distances, so far I have tested it at 100, 200, and 800. So far I have eliminated the shooter/environment by alternating shots with another rifle that patterned just fine. I used the same bipod and bags for both rifles. I also went through and checked torque on the rings, rail, and action screws. As best as I can tell it's not walking to the side as the barrel heats, just dispersing horizontally. </p><p></p><p>I'm looking for suggestions on what to look for next. It's currently in a Woox stock while I wait for a Manners to get finished and I suspect that's the problem. Judging from the marks on the chassis, it appears to be contacting the chassis on the sides of the recoil lug, on either side of the front of the action, and on either side of the pressure pad in the back. I don't at the moment have another stock I can put it in to test. Wondering if I should bed the chassis or look elsewhere?</p><p></p><p>Thanks</p></blockquote><p></p>
[QUOTE="BillNye, post: 2807679, member: 114642"] I am working with a newly built rifle, all quality components with a Nightforce ATACR scope in Hawkins rings. The barrel has been fully broken in, 150 rounds through it fireforming brass. I put together a few loads for it with Hammer Hunters and Berger hybrids, ADG brass, and H1000. I have no reason to think the loads are an issue. Consistently, with every load tested, I am getting minimal vertical dispersion and extreme horizontal dispersion. Approximately 2-2.5 MOA horizontal and 0.3-0.6 MOA vertical. It repeats this pattern at multiple distances, so far I have tested it at 100, 200, and 800. So far I have eliminated the shooter/environment by alternating shots with another rifle that patterned just fine. I used the same bipod and bags for both rifles. I also went through and checked torque on the rings, rail, and action screws. As best as I can tell it's not walking to the side as the barrel heats, just dispersing horizontally. I'm looking for suggestions on what to look for next. It's currently in a Woox stock while I wait for a Manners to get finished and I suspect that's the problem. Judging from the marks on the chassis, it appears to be contacting the chassis on the sides of the recoil lug, on either side of the front of the action, and on either side of the pressure pad in the back. I don't at the moment have another stock I can put it in to test. Wondering if I should bed the chassis or look elsewhere? Thanks [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Need some help troubleshooting horizontal grouping.
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