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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
How to true the BC
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<blockquote data-quote="Recon$$" data-source="post: 2542546" data-attributes="member: 34122"><p>Trueing the rifle. Means you shoot the rifle around where the bullet starts going transonic. So let's use a 20" .308 at 2700 fps. That is around 750 yards with a 175 smk. So instead of confirming your dope at 200, 300, etc... you simple shoot out to 750 and record the dope. Say you are off by .2 .3 mil. You go into the program and say at 750 the rifle actually shoots at 4.5 mil instead of 4.2. Then the program adjusts the rifles dope out to 750 to be exactly correct. You can do this past transonic etc...</p></blockquote><p></p>
[QUOTE="Recon$$, post: 2542546, member: 34122"] Trueing the rifle. Means you shoot the rifle around where the bullet starts going transonic. So let's use a 20" .308 at 2700 fps. That is around 750 yards with a 175 smk. So instead of confirming your dope at 200, 300, etc... you simple shoot out to 750 and record the dope. Say you are off by .2 .3 mil. You go into the program and say at 750 the rifle actually shoots at 4.5 mil instead of 4.2. Then the program adjusts the rifles dope out to 750 to be exactly correct. You can do this past transonic etc... [/QUOTE]
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How to true the BC
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