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Rifles, Reloading, Optics, Equipment
Reloading
Neck diameter clearance on tight neck chamber
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<blockquote data-quote="Rflshootr" data-source="post: 1837761" data-attributes="member: 10284"><p>Most bench rest guys use .002-.003 clearance with no problem. Saying that, most also have the throat cut so that the base of the bullet is above the neck/shoulder junction to avoid the doughnut that can form in that area after repeated firings. Myself, I like .002 if I can get it, .003 tops. The more clearance that exits, the more the brass is worked when it is resized which equals less case life. I would determine where the bullet you will be using will sit when touching the lands. If the base of the bullet is .040-.050 above the neck/shoulder junction, then .002 clearance is enough. This will also give you some room to tune the load if your rifle likes the bullets off the lands. And just as an added note, minimum full length size your brass to headspace off the shoulder and not the belt. This will also help increase brass life.</p></blockquote><p></p>
[QUOTE="Rflshootr, post: 1837761, member: 10284"] Most bench rest guys use .002-.003 clearance with no problem. Saying that, most also have the throat cut so that the base of the bullet is above the neck/shoulder junction to avoid the doughnut that can form in that area after repeated firings. Myself, I like .002 if I can get it, .003 tops. The more clearance that exits, the more the brass is worked when it is resized which equals less case life. I would determine where the bullet you will be using will sit when touching the lands. If the base of the bullet is .040-.050 above the neck/shoulder junction, then .002 clearance is enough. This will also give you some room to tune the load if your rifle likes the bullets off the lands. And just as an added note, minimum full length size your brass to headspace off the shoulder and not the belt. This will also help increase brass life. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Neck diameter clearance on tight neck chamber
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