Yesterday I went out and fired a box of factory 150 gr. winchester ammo through my .30-06 and when I was inspecting the brass after I tumbled it over night, every one has an ejector mark on it. This brass was supposed to replace some that I thought I had the load too hot in my workups, but now I am wondering if there is something funky happening with the rifle. I took the action and barrel off of the stock and did a thorough cleaning 170 rounds ago. The barrell gets cleaned after every trip to shoot, whether I shoot one shot or 50. The 20 reloads that had the ejector marks were shot with some fowling in the barrell, about 15 rounds of an old load. I had just finished cleaning the action/barrell when I left to go shoot the factory loads. Does anyone have an idea as to what would cause this????????