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Old October 11, 2012, 09:58 AM   #3
Senior Member
Join Date: May 8, 2009
Location: Florida
Posts: 3,163
Good point well made.

The way I think of it is to imagine a line through the center of the bore and a line through the center of the aligned sights. POI equals POA only where those lines intersect. Since the sights are above the bore, the bullet rises to the line of sight to intersect it a certain point x feet out, and then continues to rise above the sight line until demon gravity takes over.
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