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Rifles, Reloading, Optics, Equipment
Reloading
Lee pro 1000 seating crooked?
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<blockquote data-quote="green 788" data-source="post: 673481" data-attributes="member: 3781"><p>I assume you have a concentricity gauge of some sort...</p><p></p><p>Check the brass (at the case neck) after you size it. See if the necks are straight at that point...</p><p></p><p>I doubt there's anything wrong with the press (assuming it seats other bullets straight)...</p><p></p><p>That leaves the dies and brass.</p><p></p><p>If your expander mandrel has gotten off axis (bent somehow) in the sizing die, it'll give you crooked case necks.</p><p></p><p>Lack of adequate lubrication on the brass during sizing often results in crooked case necks as well, as they are pulled off axis when the expander ball pulls back through.</p><p></p><p>You can limit and often eliminate the need for lube inside the case neck by making sure necks are clean inside, and then you can polish the expander ball by chucking the mandrel in a drill, and polishing it to a mirror finish with 400 then 600 grit sandpaper. This too will help to keep case necks straight when sizing.</p><p></p><p>Check concentricity of fired cases before sizing, then after sizing... you can rotate the expander mandrel in small increments, re-tighten, and size again until you find a point where the case necks come out straightest.</p><p></p><p>Bad brass, especially some surplus military type cases, are often so poorly made they can't be fixed without neck turning, which probably still wouldn't be worth the effort.</p><p></p><p>What kind of brass are you using?</p><p></p><p>Dan</p></blockquote><p></p>
[QUOTE="green 788, post: 673481, member: 3781"] I assume you have a concentricity gauge of some sort... Check the brass (at the case neck) after you size it. See if the necks are straight at that point... I doubt there's anything wrong with the press (assuming it seats other bullets straight)... That leaves the dies and brass. If your expander mandrel has gotten off axis (bent somehow) in the sizing die, it'll give you crooked case necks. Lack of adequate lubrication on the brass during sizing often results in crooked case necks as well, as they are pulled off axis when the expander ball pulls back through. You can limit and often eliminate the need for lube inside the case neck by making sure necks are clean inside, and then you can polish the expander ball by chucking the mandrel in a drill, and polishing it to a mirror finish with 400 then 600 grit sandpaper. This too will help to keep case necks straight when sizing. Check concentricity of fired cases before sizing, then after sizing... you can rotate the expander mandrel in small increments, re-tighten, and size again until you find a point where the case necks come out straightest. Bad brass, especially some surplus military type cases, are often so poorly made they can't be fixed without neck turning, which probably still wouldn't be worth the effort. What kind of brass are you using? Dan [/QUOTE]
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Lee pro 1000 seating crooked?
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