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Rifles, Reloading, Optics, Equipment
Reloading
How do you lower S.D.?
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<blockquote data-quote="davewilson" data-source="post: 188940" data-attributes="member: 4491"><p>Weda, did you ever have one of those "tops" when you were a kid? the kind that you would wrap a string around it and hank the string to "spin it like a top" they're usually round with a very pointed tip that allows it to spin for quite a while on the floor or any smooth surface. when you first cut it loose, it doesn't stay in one spot, but travels in a circle as it leans ever so slightly towards the center of the circular path it's on. then in a few seconds it will stop it's circular path and spin in one spot, or very close to one spot. eventually it starts wobbling and goes all over the place till it of course stops all together. this is a yaw effect and pretty much how a bullet acts as it goes through the air.as a bullet goes down the barrel, it's fully supported and all of a sudden it's not when it's released into the air. like the top it starts going in a circular manner but the tip is always pointing to a spot well downrange on the centerline with the bore of the barrel.</p><p></p><p>i tested this with a gun that would shoot an inch at 200 yards if all was well. i put targets up at 35, 75, 125 and 200. i shot using a round robin method and all the groups were around an inch except the 35. it was about .75 in diameter. i shot at 35 yards only on another day and the group was about the same. i only did this with one gun but i'm a firm believer in the "yaw effect"</p></blockquote><p></p>
[QUOTE="davewilson, post: 188940, member: 4491"] Weda, did you ever have one of those "tops" when you were a kid? the kind that you would wrap a string around it and hank the string to "spin it like a top" they're usually round with a very pointed tip that allows it to spin for quite a while on the floor or any smooth surface. when you first cut it loose, it doesn't stay in one spot, but travels in a circle as it leans ever so slightly towards the center of the circular path it's on. then in a few seconds it will stop it's circular path and spin in one spot, or very close to one spot. eventually it starts wobbling and goes all over the place till it of course stops all together. this is a yaw effect and pretty much how a bullet acts as it goes through the air.as a bullet goes down the barrel, it's fully supported and all of a sudden it's not when it's released into the air. like the top it starts going in a circular manner but the tip is always pointing to a spot well downrange on the centerline with the bore of the barrel. i tested this with a gun that would shoot an inch at 200 yards if all was well. i put targets up at 35, 75, 125 and 200. i shot using a round robin method and all the groups were around an inch except the 35. it was about .75 in diameter. i shot at 35 yards only on another day and the group was about the same. i only did this with one gun but i'm a firm believer in the "yaw effect" [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
How do you lower S.D.?
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