Okay, I know these guys don't know nothin' either relentless....................that is BC.
http://www.ultimatesniper.com/Docs/46.PDF
When you consult an ammo manufacturer's rifle ballistic tables, you're actually
looking at the velocity when fired through a 24-inch barrel.
Maybe you prefer;
http://www.millettsights.com/resourc...sion-shooters/
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Here's some more, but only for precision shooters;
The Final Step — Confirmation Firing
You have now prepared a precise ballistic data card, containing all your target knob settings. This is excellent but it's also THEORETICAL. The ballistic software that generates trajectory data is driven by certain standards, prepared by SAAMI, the Sporting Arms and Ammunition Manufacturer's Institute. These assume: a rifle having a 24-inch barrel; a scope mounted 1-1/2 inches above the bore; a shot fired in an ambient temperature of 59 degrees Fahrenheit; and, fired at sea level. To the degree that your rifle and scope and shooting environment differ from these standards, you will experience slightly different results.
You are living in YOUR OWN WORLD, no one else matters, huh !
Oh yea...........................one more thing;
"I have seen you post some silly crap on here. And really silly crap on the optics forum, but this one is your silliest."