What are some long-range flat shooting calibers with a good amount of knockdown power?. I know .270, 30-06 and the likes, what are some others? I'm gonna buy a deer rifle sometime so I can stop mooching of my grandpa. I want a gun that I can use for everything from deer on up. So far I've heard most of the 300's, 30-06 and .243. I'm not a big fan of the .243, my friends hunt with them and it always seems like it takes multiple shots or lots of tracking to get them. I want something with more power than that, recoil isn't a big factor.