Mill Leaving Ridges While Face Milling

So I recently picked up a valenite 3" face mill and just getting around to trying it today. I stuck a piece of 4" aluminum in the vise, on the parallels and took a .200 pass. Feeding from left to right it left a semi mirror sort of ghostly finish. When I moved the y in and took the last 1" or so pass coming back across it was leaving a very noticeable ridge but was leaving a mirror finish. As it came close to the end of the cut it was about flush with were the first pass was.
I just trammed...

Mill Leaving Ridges While Face Milling