Hello the highroad this message and is in regards to a barrel Breakin on a new rifle. The rifle is a Winchester model 70 extreme all weather chambered in the 7 mm magnum. I will be shooting Barnes TTSX. My question is how do I break in the barrel? I have never performed a barrel break-in however would like to with this rifle. Any help with this project is appreciated thanks. If you could please provide a website with any research or data that may have helped you along the way I would appreciate it.