Weatherby advertised their .223 rifle as sub-minute-of-angle-accurate using the first three rounds from a cool barrel as a measurement; I found this to be so. When I continued firing a rapid string of up to twenty rounds and the barrel got no-touch hot, three-shot groups grew to 1 1/2 to 2 MOA. This is with a twenty-two-inch barrel and on a pretty hot day at 100 yards.
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