how are the nosler 168\'s compared to sierra? I was just about to try some of the nosler 168 grain 30 cal bthp custom competition bullets for my m-1 and was wondering what you all thought about them compared to sierra 168 bthp's. I do a lot of extreme long range prairie doggin with my m-14 and am whipping the m-1 into shape to go even farther. Just no scope on the m-1 is all. I got my work cut out for me. Any thoughts?