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Rifles, Reloading, Optics, Equipment
Reloading
Mandrel as last step?
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<blockquote data-quote="Dragoon300" data-source="post: 2732041" data-attributes="member: 115285"><p>I guarantee the bullet is moving forward while the neck is expanding, the bullet does not stand still and wait for expansion. Pressure causes both to happen incrementally at first. The rear of the bullet has x square inches that are directly exposed to thousands of pounds per square inch pushing the bullet forward, the inside of the neck is filled and not directly exposed to pressure until the bullet moves forward. The bullet would be pushed out of the case overcoming even the normal .005" interference fit friction of standard dies quite easily, as long as the chamber did not squeeze the case tighter and lock the bullet in. Pressure will likely be higher in that situation, but consider how a low pressure squib load doesn't fully expand the case to seal off, or how just a primer without powder pushes the bullet into the rifling where it stops. The case neck does not expand before the bullet moves, but as it moves. It is when the bullet reaches the rifling that the pressure builds enough to expand the brass, and completely seal the chamber.</p></blockquote><p></p>
[QUOTE="Dragoon300, post: 2732041, member: 115285"] I guarantee the bullet is moving forward while the neck is expanding, the bullet does not stand still and wait for expansion. Pressure causes both to happen incrementally at first. The rear of the bullet has x square inches that are directly exposed to thousands of pounds per square inch pushing the bullet forward, the inside of the neck is filled and not directly exposed to pressure until the bullet moves forward. The bullet would be pushed out of the case overcoming even the normal .005" interference fit friction of standard dies quite easily, as long as the chamber did not squeeze the case tighter and lock the bullet in. Pressure will likely be higher in that situation, but consider how a low pressure squib load doesn't fully expand the case to seal off, or how just a primer without powder pushes the bullet into the rifling where it stops. The case neck does not expand before the bullet moves, but as it moves. It is when the bullet reaches the rifling that the pressure builds enough to expand the brass, and completely seal the chamber. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Mandrel as last step?
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