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Old January 3, 2013, 08:53 PM   #16
Bart B.
Senior Member
Join Date: February 15, 2009
Posts: 6,318
Wherever the BDC thing (reticule or knob) is, it's only good for one muzzle velocity, one altitude, one set of atmospheric conditions and one bullet. Altitude and atmospheric conditions not being right can easily cause a 5 foot elevation error in shot impact at 1000 yards.
US Navy Distinguished Marksman Badge 153
Former US Navy & Palma Rifle Team Member
NRA High Power Master & Long Range High Master
NRA Smallbore Prone Master
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