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Rifles, Reloading, Optics, Equipment
Reloading
Bullet seater die
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<blockquote data-quote="Bart B" data-source="post: 1149398" data-attributes="member: 5302"><p>As long as the seater doesn't touch the tip at all, any place on the ogive will work. All bullets' shapes are not identical, so there'll be a small spread of a few thousandths measured from case head to bullet tip.</p><p></p><p>Are you wanting every round's bullet to have exactly the same distance the bullet is from the rifling? If so, consider the following.</p><p></p><p>All rimless bottleneck cases are full forward in the chamber when fired. Their shoulder's hard agaisnt the chamber shoulder at that time. There's a small gap between the bolt face and case head (called head clearance) because the distance from case head to the shoulder is not the same across all cases. If varies by a few thousandths. If all loaded rounds have exactly the same overall length, that small spread in head clearance is going to cause the same spread in how far the bullet jumps to the rifling.</p><p></p><p>A few thousandths spread in head clearance causes no problems with peak pressure nor accuracy whatsoever. It's needed to allow the bolt to close into battery exactly the same without binding for best accuracy and ease of operation. Besides, your 300 WSM's rifling erodes away increasing that bullet jump distance about .001" for every 10 to 15 shots anyway. That's normal and also causes no problems for the life of the barrel.</p></blockquote><p></p>
[QUOTE="Bart B, post: 1149398, member: 5302"] As long as the seater doesn't touch the tip at all, any place on the ogive will work. All bullets' shapes are not identical, so there'll be a small spread of a few thousandths measured from case head to bullet tip. Are you wanting every round's bullet to have exactly the same distance the bullet is from the rifling? If so, consider the following. All rimless bottleneck cases are full forward in the chamber when fired. Their shoulder's hard agaisnt the chamber shoulder at that time. There's a small gap between the bolt face and case head (called head clearance) because the distance from case head to the shoulder is not the same across all cases. If varies by a few thousandths. If all loaded rounds have exactly the same overall length, that small spread in head clearance is going to cause the same spread in how far the bullet jumps to the rifling. A few thousandths spread in head clearance causes no problems with peak pressure nor accuracy whatsoever. It's needed to allow the bolt to close into battery exactly the same without binding for best accuracy and ease of operation. Besides, your 300 WSM's rifling erodes away increasing that bullet jump distance about .001" for every 10 to 15 shots anyway. That's normal and also causes no problems for the life of the barrel. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Bullet seater die
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