I have an older Remington 700, chambered in 7mm Mag. I plan on building a long range rig out of it. I dont care for the round and want to change it over to something else. I don't want to modify the bolt face, and ammo should be able to fit into a standard AICS magazine. I was sold on the .28 Nosler till I learned how bad of a barrel burner it is. I want something that will retain its accuracy out to around 3,000 rounds. So far the only thing I can think of is the .300 WM. Anybody have any other suggestions of calibers I should be looking at for this project?