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Rifles, Reloading, Optics, Equipment
Gunsmithing
Barrel pics
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<blockquote data-quote="tobnpr" data-source="post: 2891105" data-attributes="member: 68758"><p>^^^ This.</p><p>What's the round count?</p><p></p><p>Well, which one changed?</p><p>Sounds like you may be trying to compare apples to oranges.</p><p>If a rifle's groups open up or become inconsistent using the same ammunition it had been shooting well- it's almost always the leade/rifling being eroded. As soon as you change anything- whether shooter, load, bullet, seating depth- any variable- it could be any one or more of the above.</p><p></p><p>If the ammunition is the same and the throat has been eroded, check bullet jump with a comparator, decrease seating depth to get jump back to where you started and see if that helps. You should easily get 2k-2500 rounds unless it's been abused by hot loads and/or long strings without allowing the barrel to cool.</p></blockquote><p></p>
[QUOTE="tobnpr, post: 2891105, member: 68758"] ^^^ This. What's the round count? Well, which one changed? Sounds like you may be trying to compare apples to oranges. If a rifle's groups open up or become inconsistent using the same ammunition it had been shooting well- it's almost always the leade/rifling being eroded. As soon as you change anything- whether shooter, load, bullet, seating depth- any variable- it could be any one or more of the above. If the ammunition is the same and the throat has been eroded, check bullet jump with a comparator, decrease seating depth to get jump back to where you started and see if that helps. You should easily get 2k-2500 rounds unless it's been abused by hot loads and/or long strings without allowing the barrel to cool. [/QUOTE]
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