i am new to cal. gun smith took my weathby.action bolted on doug. prem barr. swar. 4-12 180 h/bt. 87 gr. 7828 @ 3160 ft. i have been to the range twice 3" high @ 1ooyd. less than 1"groups im very happy with performance. im looking for info at long ranges bullit drop etc. thanks! gary/mesa,az.