I am getting ready to try to develope a long rang load for my brothers 300 RUM Sendero. Does anyone have a pet load with good accuracy and ballistics for shooting out to 1k? I am thinking that we want at least 190gr or larger bullet. I shoot smk's in my Edge and they have done great. Has anyone had good experience with SMK's appropriate for the 300 RUM? Thanks for th help.. J.P.