To answer your question - hunting requires 1 shot from a cold barrel that hits exactly where you expect it to.
a 3" variation at 100 yds after just 1 shot is way out of whack. I am sure some of the really smart guys can give you some possible causes.
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U.S Army, Retired
Ethics is knowing the difference between what you have a right to do and what is right to do. -Potter Stewart
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