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Rifles, Reloading, Optics, Equipment
Reloading
280ai load development (continues)
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<blockquote data-quote="Bruce Treloar" data-source="post: 2602705" data-attributes="member: 104002"><p>I try to get a seating depth tune as fast as possible so as not to wear out the barrel before taking it out hunting. I start at 10thou off the lands and then 50 thou off to see which one it likes. Check the groups for vertical or horizontal pattern. It's awhile since I tuned a new barrel but by seating the bullet out the group goes more horizontal and by seating it in the group goes vertical. I look for the middle between the two. Vertical or horizontal could be opposite like seating in could show vertical and seating out goes horizontal. When the best group from a new barrel is round, I know it's going to be a real good barrel and just needs an increase in powder to shrink group size. Do go with a top bullet like Berger that has best jacket concentricity and stick with that.</p><p>Can't help with a powder but there's enough information here to select a suitable powder.</p><p>Best of luck</p></blockquote><p></p>
[QUOTE="Bruce Treloar, post: 2602705, member: 104002"] I try to get a seating depth tune as fast as possible so as not to wear out the barrel before taking it out hunting. I start at 10thou off the lands and then 50 thou off to see which one it likes. Check the groups for vertical or horizontal pattern. It's awhile since I tuned a new barrel but by seating the bullet out the group goes more horizontal and by seating it in the group goes vertical. I look for the middle between the two. Vertical or horizontal could be opposite like seating in could show vertical and seating out goes horizontal. When the best group from a new barrel is round, I know it's going to be a real good barrel and just needs an increase in powder to shrink group size. Do go with a top bullet like Berger that has best jacket concentricity and stick with that. Can't help with a powder but there's enough information here to select a suitable powder. Best of luck [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
280ai load development (continues)
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