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Rifles, Reloading, Optics, Equipment
Reloading
Your personal boundaries for case neck runout?
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<blockquote data-quote="Greyfox" data-source="post: 1593335" data-attributes="member: 10291"><p>Quote:Rick Richard:</p><p>Thanks so much for the reply. Is there anything in particular you do to achieve the low runout?</p><p></p><p>Yes. It's important to make sure that even when using bullet guided seating dyes as described earlier in this thread that the seating alignment is near perfect, and seating pressure is light and smooth.</p><p>—Seating plug fit to the bullet is important. I have two different stems for my seater, both conventional and VLD. If the matched seater plug does not produce a low enough runout, try the conventional plug. I have a few loads where I get better runout with the "wrong" sized plug. Sometimes rotating the bullet 2-3x during the seating stroke can improve runout. Alternatively, placing a small rubber o-ring under the seating stem luck nut can enable self-alignment if the seater plug in the neck. </p><p>-I like a light, .00015-002" of neck tension, make sure there is slight chamfer in the inside of the neck. I prefer to clean with corncob leaving the carbon film on the inside of the neck for lubricity. Dry graphite for totally clean necks.</p><p>-I have been able to achieve .002" or less runout with,and without an expander depending on the particular load. The o-ring described earlier may be required if the stem is not perfectly straight. I will generally start without the expander. If runouts are high, I'll try the expander. It has improved runouts with several of my loads. </p><p>-I like to have a minimum of bullet bearing surface with the neck of at least 60%, preferably 80-100%.</p><p>-I have almost always been able to achieve low runout with these techniques but, if all else fails and runout remains high, change the bullet. This has also worked!</p></blockquote><p></p>
[QUOTE="Greyfox, post: 1593335, member: 10291"] Quote:Rick Richard: Thanks so much for the reply. Is there anything in particular you do to achieve the low runout? Yes. It’s important to make sure that even when using bullet guided seating dyes as described earlier in this thread that the seating alignment is near perfect, and seating pressure is light and smooth. —Seating plug fit to the bullet is important. I have two different stems for my seater, both conventional and VLD. If the matched seater plug does not produce a low enough runout, try the conventional plug. I have a few loads where I get better runout with the “wrong” sized plug. Sometimes rotating the bullet 2-3x during the seating stroke can improve runout. Alternatively, placing a small rubber o-ring under the seating stem luck nut can enable self-alignment if the seater plug in the neck. -I like a light, .00015-002” of neck tension, make sure there is slight chamfer in the inside of the neck. I prefer to clean with corncob leaving the carbon film on the inside of the neck for lubricity. Dry graphite for totally clean necks. -I have been able to achieve .002” or less runout with,and without an expander depending on the particular load. The o-ring described earlier may be required if the stem is not perfectly straight. I will generally start without the expander. If runouts are high, I’ll try the expander. It has improved runouts with several of my loads. -I like to have a minimum of bullet bearing surface with the neck of at least 60%, preferably 80-100%. -I have almost always been able to achieve low runout with these techniques but, if all else fails and runout remains high, change the bullet. This has also worked! [/QUOTE]
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Reloading
Your personal boundaries for case neck runout?
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