[dasher]

***Isn't a .223 exactly what you describe, a varmit round capable of doing a lot of damage? ***

It sure is, a .223 round is quite potent out to 300 yards, beyond that it's losing alot of it's energy but will still inflict good amounts of damage. If this guy is good, he could be as far out as 400 to 500 yards, though it's unlikely unless he found high enough ground to shoot over cars in the parking lot's of these stores. Two shots on one target from that distance is a very tough feat as well.

[samuel_adams_us]

This one will hit's hit mark a lot further out than that:

http://www.snipercentral.com/sg550.htm