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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Excessive Throat Growth Question
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<blockquote data-quote="Bart B" data-source="post: 621216" data-attributes="member: 5302"><p>Chasing the lands or even opening up the bore and groove diameters one thousandths inch won't change a barrel's fundamental frequency (harmonics are just multiples of that at higher frequencies) more than 1 tenth, maybe 2 tenths of 1 percent. An insignificant amount. Not enough to be physically measured but can only be calculated with math or seen with high speed electronic counters. There's more difference of where the bullets leave in the barrel's low frequency vertical whip cycle with a 5 or 6 fps spread in velocity than what severe throat eroding causes.</p></blockquote><p></p>
[QUOTE="Bart B, post: 621216, member: 5302"] Chasing the lands or even opening up the bore and groove diameters one thousandths inch won't change a barrel's fundamental frequency (harmonics are just multiples of that at higher frequencies) more than 1 tenth, maybe 2 tenths of 1 percent. An insignificant amount. Not enough to be physically measured but can only be calculated with math or seen with high speed electronic counters. There's more difference of where the bullets leave in the barrel's low frequency vertical whip cycle with a 5 or 6 fps spread in velocity than what severe throat eroding causes. [/QUOTE]
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Excessive Throat Growth Question
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