I have a Browning Micro Medallion .243 that was given to me by my father. My problem is I don't like a .243. I really would like to rebarrel it to 7mm-08 , .260, or .308 , preferably the 7mm-08. Is this a simple rebarrel job since all are based on the same case or would other modifications necessary. There's nothing wrong with the .243, I just like a little more bullet weight and more diameter for deer. Give me some feedback?