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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Excessive Throat Growth Question
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<blockquote data-quote="Bart B" data-source="post: 620733" data-attributes="member: 5302"><p>With about .050" of throat wear at the bullet's ogive contact from where it started when new, that's about normal when accuracy drops off. But the worst part of this is the throat's eroded more than that further down the bore. That's the part that tends to gouge bullets and upset their perfect form so accuracy degrades.</p><p></p><p>Usually, if one seats bullets .010" longer than throat contact in necks that aren't too tight so the bullet seats back a bit when the bolt's closed, accuracy will still continue to be great. Sometimes such that bullets need be seated .075" further out than when the barrel's new.</p><p></p><p>What cartridge were you shooting? For some, 900 rounds to loss of gilt-edge accuracy is normal.</p><p></p><p>And what do you mean by "hot" loads?</p></blockquote><p></p>
[QUOTE="Bart B, post: 620733, member: 5302"] With about .050" of throat wear at the bullet's ogive contact from where it started when new, that's about normal when accuracy drops off. But the worst part of this is the throat's eroded more than that further down the bore. That's the part that tends to gouge bullets and upset their perfect form so accuracy degrades. Usually, if one seats bullets .010" longer than throat contact in necks that aren't too tight so the bullet seats back a bit when the bolt's closed, accuracy will still continue to be great. Sometimes such that bullets need be seated .075" further out than when the barrel's new. What cartridge were you shooting? For some, 900 rounds to loss of gilt-edge accuracy is normal. And what do you mean by "hot" loads? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Excessive Throat Growth Question
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