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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
How to test bullet expansion?
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<blockquote data-quote="Radman" data-source="post: 2351413" data-attributes="member: 112033"><p>Yes, but does rotational speed (rpm) decrease at the same rate as travel velocity? It seems there are far fewer forces acting to slow rpms than the many forces acting on travel velocity. (Air friction, bow wave, base drag, parasitic drag & perhaps others) </p><p>Just thinking....do any laws of physics demand that the slowing of forward momentum relate directly to a rotational inertia? I see that being a direct relationship, whilst still in the barrel, but once free of the barrel's influence, what says that the rotational speed is directly geared to forward speed, (especially in lieu of the aforementioned exterbal forces). Good discussions amongst friends....</p></blockquote><p></p>
[QUOTE="Radman, post: 2351413, member: 112033"] Yes, but does rotational speed (rpm) decrease at the same rate as travel velocity? It seems there are far fewer forces acting to slow rpms than the many forces acting on travel velocity. (Air friction, bow wave, base drag, parasitic drag & perhaps others) Just thinking....do any laws of physics demand that the slowing of forward momentum relate directly to a rotational inertia? I see that being a direct relationship, whilst still in the barrel, but once free of the barrel's influence, what says that the rotational speed is directly geared to forward speed, (especially in lieu of the aforementioned exterbal forces). Good discussions amongst friends.... [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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How to test bullet expansion?
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