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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Help me plan out a mid range rifle? .25-06 & light barrel experts needed.
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<blockquote data-quote="Bart B" data-source="post: 508239" data-attributes="member: 5302"><p>No, it doesn't stand to reason. Here's why.</p><p></p><p>The reason barrels shoot more accurate when free floated is they're clear of the stock's fore end that moves around from holding pressure as it rests on something or from sling tension. When the fore end bends/whips/vibrates and touches the barrel as the shot's fired, the barrel will change the direction and/or amount it wiggles as the bullet goes through it.</p><p></p><p>But the barreled action's basic frequency it wiggles at does not change. For a given barreled action, it has one low frequency it wiggles at; typically less than 100 hz (cycles per second) that changes the muzzle axis angles it points at. The harmonics of that barrel are multiples of that one low (or fundamental resonant) frequency; 2x, 3x, 4x or second, third or fourth harmonic. These harmonics change the muzzle axis angle very little compared to the big angle caused by the fundamental frequency.</p><p></p><p>Bolting the barreled action in a stock changes that fundamental frequency a tiny bit because it adds the stock's mass to the system. Mounting a scope changes it a little bit, too.</p><p></p><p>This is the first time I've heard from anyone that a rifle shoots less accurate after free floating the barrel. If that really happened, it's not because some barreled action whipping/vibrating frequency changed; that doesn't change. As one's removed any interference between barrel and fore end by free floating the barrel, I cannot concieve why accuracy would be worse. So, I think something else changed from original bedding to free floating the barrel.</p></blockquote><p></p>
[QUOTE="Bart B, post: 508239, member: 5302"] No, it doesn't stand to reason. Here's why. The reason barrels shoot more accurate when free floated is they're clear of the stock's fore end that moves around from holding pressure as it rests on something or from sling tension. When the fore end bends/whips/vibrates and touches the barrel as the shot's fired, the barrel will change the direction and/or amount it wiggles as the bullet goes through it. But the barreled action's basic frequency it wiggles at does not change. For a given barreled action, it has one low frequency it wiggles at; typically less than 100 hz (cycles per second) that changes the muzzle axis angles it points at. The harmonics of that barrel are multiples of that one low (or fundamental resonant) frequency; 2x, 3x, 4x or second, third or fourth harmonic. These harmonics change the muzzle axis angle very little compared to the big angle caused by the fundamental frequency. Bolting the barreled action in a stock changes that fundamental frequency a tiny bit because it adds the stock's mass to the system. Mounting a scope changes it a little bit, too. This is the first time I've heard from anyone that a rifle shoots less accurate after free floating the barrel. If that really happened, it's not because some barreled action whipping/vibrating frequency changed; that doesn't change. As one's removed any interference between barrel and fore end by free floating the barrel, I cannot concieve why accuracy would be worse. So, I think something else changed from original bedding to free floating the barrel. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Help me plan out a mid range rifle? .25-06 & light barrel experts needed.
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