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Rifles, Reloading, Optics, Equipment
Reloading
Case Neck Separation. Why?
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<blockquote data-quote="Alibiiv" data-source="post: 1844831" data-attributes="member: 69192"><p>I'd like to recommend removing the primer with a universal decapping tool like RCBS or Lee ($20), I have a Lee decapping tool. I use a salt bath annealing system so decap to let the air out of the brass when I quench in water. Anneal the brass every second resizing on .270 Ackley Improved (fire formed necks/shoulders). There's definitely a difference in the amount of pressure needed to full-length resizing and neck sizing after the brass is annealed. After annealing I tumble the brass for about two hours in walnut media an a Hornady based polish. Then I resize my brass with a full-length resizing die with the expander plug removed and then size the necks with a Sinclair mandrel die for neck resistance/interference. Before resizing I use Hornady "One-shot" sizing lube and I do spray the necks before resizing. I have not had any issues with lube build up and wrinkled necks. I use a graphite lube on the case necks before using the mandrel for neck sizing. And the answer to your question, in my opinion, is a lack of annealing of your cases that have caused your necks to separate. A lack of cleaning could also have caused a build up of dirt inside of your full-length resizing die.</p></blockquote><p></p>
[QUOTE="Alibiiv, post: 1844831, member: 69192"] I'd like to recommend removing the primer with a universal decapping tool like RCBS or Lee ($20), I have a Lee decapping tool. I use a salt bath annealing system so decap to let the air out of the brass when I quench in water. Anneal the brass every second resizing on .270 Ackley Improved (fire formed necks/shoulders). There's definitely a difference in the amount of pressure needed to full-length resizing and neck sizing after the brass is annealed. After annealing I tumble the brass for about two hours in walnut media an a Hornady based polish. Then I resize my brass with a full-length resizing die with the expander plug removed and then size the necks with a Sinclair mandrel die for neck resistance/interference. Before resizing I use Hornady "One-shot" sizing lube and I do spray the necks before resizing. I have not had any issues with lube build up and wrinkled necks. I use a graphite lube on the case necks before using the mandrel for neck sizing. And the answer to your question, in my opinion, is a lack of annealing of your cases that have caused your necks to separate. A lack of cleaning could also have caused a build up of dirt inside of your full-length resizing die. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Case Neck Separation. Why?
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