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<blockquote data-quote="Canadian Bushman" data-source="post: 1870238" data-attributes="member: 41122"><p>There is some truth to this, but i feel they have their facts a bit crossed up. There is usually some initial instability when a bullet leaves a barrel. Bullets are never perfectly balanced, nor will they always enter the rifling with their axis perfectly parallel to the bore axis. Also the high pressure gas driving the bullet is going to try to overcome the bullet the instant it has a path to do so. All these variables contribute to the bullets initial yaw when it exits the barrel. Boat tails certainly help the muzzle gases overcome the bullet and affect its initial instability problems.</p><p></p><p>However I believe a properly stabilized bullet settles down much much more rapidly then 300 yards. In fact many benchrest shooters have shot their heavy guns through rows of card stock at a few feet from the barrel to confirm bullet stability of a bullet barrel combo before pouring tedious effort tuning because they felt quickly stabilizing bullets were key to long range accuracy.</p><p></p><p>Harold Vaughn has probably studied this effect in small arms the most thoroughly in his book "Rifle accuracy facts" and Bryan Litz, of course confirmed his findings in his books.</p><p></p><p>However the physics of this scenario have long been studied in field artillery and naval guns where long trajectories and high launch angles are much more dramatically effected by these conditions.</p></blockquote><p></p>
[QUOTE="Canadian Bushman, post: 1870238, member: 41122"] There is some truth to this, but i feel they have their facts a bit crossed up. There is usually some initial instability when a bullet leaves a barrel. Bullets are never perfectly balanced, nor will they always enter the rifling with their axis perfectly parallel to the bore axis. Also the high pressure gas driving the bullet is going to try to overcome the bullet the instant it has a path to do so. All these variables contribute to the bullets initial yaw when it exits the barrel. Boat tails certainly help the muzzle gases overcome the bullet and affect its initial instability problems. However I believe a properly stabilized bullet settles down much much more rapidly then 300 yards. In fact many benchrest shooters have shot their heavy guns through rows of card stock at a few feet from the barrel to confirm bullet stability of a bullet barrel combo before pouring tedious effort tuning because they felt quickly stabilizing bullets were key to long range accuracy. Harold Vaughn has probably studied this effect in small arms the most thoroughly in his book “Rifle accuracy facts” and Bryan Litz, of course confirmed his findings in his books. However the physics of this scenario have long been studied in field artillery and naval guns where long trajectories and high launch angles are much more dramatically effected by these conditions. [/QUOTE]
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