I'm sorry and don't want to P--- you off but unless he walks backwards he must be broadside at some point? And if you have a solid rest and can group 1" at 150 yds, what the H problem? You should be able to hit him at 350 yds with that gun ? And if you are worried about hitting his guts if hes facing you, what do you think you have to go through to get to the guts ????????? 180yds is nothing for the fine little 243 bullet. Shoot him already.