A friend of mine got a custom rifle from a pawn shop. It has a Mauser action. They told him it was a 7mm mag. It is not, he thinks it is a 30.06. I'm going to take him to my smith Friday evening to see what it is. He is thinking about just having it re barreled. But he was asking me what was the best long action long range round? I am not familiar with any of that. 30.6, 280, 7mm mag, 30.06AI, 280AI??? Anyone have any input?