I would like to have a flat and fast cartridge. I would be hunting Ar. whitetail and I have hopes of going muley or elk hunting one day. I'm thinking of a short barreled rem700 setup in a htg stock. I don't NEED a new rifle, I just have an itch for one. I already have a couple .308's and a 25.06 sendero. What do ya'll think about the 280, and can you run one with a 20 or 22 inch barrel?