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Rifles, Reloading, Optics, Equipment
Reloading
How do you eliminate runout
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<blockquote data-quote="J E Custom" data-source="post: 1912552" data-attributes="member: 2736"><p>I found the same problems until I started turning the necks (Just enough to clean them up and get the wall thickness the same) on New cases. Once I started prepping the new brass before it was fired in my chamber, I found better quality cases after being fire formed to the chamber. I check all cases before loading with the concentricity gauge to verify concentricity, Then, I started checking after each step in the loading process to find the problem/weak point. Sizing had a small effect/if any when minimally sized to feed. The largest change came in the bullet seating step. So I worked on a method to minimize the runout in this step. </p><p></p><p>Now it is common to load 70 to 80% with no runout and the remainder are normally under .0015.</p><p>Zero runout, is no doubt the most accurate, But as long as you stay less than .001, it is hard to tell the difference except for very small improvements in group size.</p><p></p><p>There are so many different things that can effect concentricity, you just have to find the one that is causing the problem. This was a good way for me and it greatly improved my ammo quality.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1912552, member: 2736"] I found the same problems until I started turning the necks (Just enough to clean them up and get the wall thickness the same) on New cases. Once I started prepping the new brass before it was fired in my chamber, I found better quality cases after being fire formed to the chamber. I check all cases before loading with the concentricity gauge to verify concentricity, Then, I started checking after each step in the loading process to find the problem/weak point. Sizing had a small effect/if any when minimally sized to feed. The largest change came in the bullet seating step. So I worked on a method to minimize the runout in this step. Now it is common to load 70 to 80% with no runout and the remainder are normally under .0015. Zero runout, is no doubt the most accurate, But as long as you stay less than .001, it is hard to tell the difference except for very small improvements in group size. There are so many different things that can effect concentricity, you just have to find the one that is causing the problem. This was a good way for me and it greatly improved my ammo quality. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
How do you eliminate runout
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