ndking1126-All the studies done on temp change are really useful, but like the computerized drop tables, may need to be checked in the field. Used to hunt up here, when 20-30 degrees is considered out of the ordinary warm. Worked up hunting loads at same time of the year, but have a range within 5 minutes. Other possible considerations are difference in clothing between seasons, testing with same rifle hold (forearm grip) and shooting position.
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