Impressive!!!

The bulk of my primers are Winchester. I have some cci also. I hear they are the hardest. A friend chambered a rd yote hunting a few weeks back, and 4 rds went off. Sounded fully auto. So after seeing that...I'm a bit gunshy. The marks are very light. Sounds like this is a common thing then. Maybe I don't need to have this worry me as much as it is then. I'm new at this. Lots more to know. Thanks for the input.