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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Cold bore accuracy
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<blockquote data-quote="MagnumManiac" data-source="post: 1999881" data-attributes="member: 10755"><p>Often, you can eliminate the cold bore shot variance by tweaking action screw torque.</p><p>It is often caused by a not so stress free bedding job.</p><p>The other cause is a not so concentric fit between barrel and action.</p><p>I have only had one barrel that did this, it turned out the heat treating part of the stress relieving was not done correctly and the barrel walked once warm. Cryo fixed it, but cost a fair amount on top of what it already cost.</p><p>If the cold bore shot always hits a certain distance away from additional shots, then I would track that and keep that as the true POI and sight in that way.</p><p>Definitely try the action screw torque variance, do 65in/lbs on the front and 55in/lbs on the rear if a synthetic or drop those by 10in/lbs each on wood. Then change by going less 5in/lbs to 45/35 as a minimum. Also try equal amounts on each as well.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 1999881, member: 10755"] Often, you can eliminate the cold bore shot variance by tweaking action screw torque. It is often caused by a not so stress free bedding job. The other cause is a not so concentric fit between barrel and action. I have only had one barrel that did this, it turned out the heat treating part of the stress relieving was not done correctly and the barrel walked once warm. Cryo fixed it, but cost a fair amount on top of what it already cost. If the cold bore shot always hits a certain distance away from additional shots, then I would track that and keep that as the true POI and sight in that way. Definitely try the action screw torque variance, do 65in/lbs on the front and 55in/lbs on the rear if a synthetic or drop those by 10in/lbs each on wood. Then change by going less 5in/lbs to 45/35 as a minimum. Also try equal amounts on each as well. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Cold bore accuracy
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