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Hunting
Long Range Hunting & Shooting
243AI, is it dead in the water?
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<blockquote data-quote="DocDoc" data-source="post: 1830980" data-attributes="member: 69144"><p>AI is designed for a .004 crush fit on the parent case. In this example the rifle should be head spaced so that there is some camming needed to close the bolt on a .243 case. That way the parent can be safely fired in the AI chamber without pushing the bullet into the rifling. The correct head space holds the case firmly against the bolt.</p><p></p><p>Unfortunately a lot AI chambers are not head spaced correctly. Someone runs a reamer into a standard barrel without taking off a thread. That leaves the chamber a wildcat and .004 or more over correct head space.</p></blockquote><p></p>
[QUOTE="DocDoc, post: 1830980, member: 69144"] AI is designed for a .004 crush fit on the parent case. In this example the rifle should be head spaced so that there is some camming needed to close the bolt on a .243 case. That way the parent can be safely fired in the AI chamber without pushing the bullet into the rifling. The correct head space holds the case firmly against the bolt. Unfortunately a lot AI chambers are not head spaced correctly. Someone runs a reamer into a standard barrel without taking off a thread. That leaves the chamber a wildcat and .004 or more over correct head space. [/QUOTE]
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Long Range Hunting & Shooting
243AI, is it dead in the water?
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