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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
keyholes
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<blockquote data-quote="CPorter" data-source="post: 93523" data-attributes="member: 4952"><p>Do you know what velocity your bullets are leaving the barrel? Keyholing generally means the spin isn't enough to keep the bullets stable. You can overcome this by speeding the bullets up a bit, getting a faster twist barrel, or going to shorter (lighter) bullets. You can check this using some of the ballistic calulators on the net. Most use the old Greenhill formula which isn't real accurate for spitzer type bullets but it does get you in the ballpark.</p><p></p><p> Less commonly a batch of bullets with bad cores can cause the bullets to deform in flight. These tend to blow up before reaching 850 yards though. If your targets show the bullets in one piece this probably isn't the case.</p></blockquote><p></p>
[QUOTE="CPorter, post: 93523, member: 4952"] Do you know what velocity your bullets are leaving the barrel? Keyholing generally means the spin isn't enough to keep the bullets stable. You can overcome this by speeding the bullets up a bit, getting a faster twist barrel, or going to shorter (lighter) bullets. You can check this using some of the ballistic calulators on the net. Most use the old Greenhill formula which isn't real accurate for spitzer type bullets but it does get you in the ballpark. Less commonly a batch of bullets with bad cores can cause the bullets to deform in flight. These tend to blow up before reaching 850 yards though. If your targets show the bullets in one piece this probably isn't the case. [/QUOTE]
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keyholes
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