guns

I have never found cleanliness or wear to be an issue with different brands. Anything you buy off the shelf from your local sporting goods store should be fine. Some people have preferences, but you will have to go through a lot of rounds before you notice much difference.

Avoid reloaded ammo unless you are very sure about the person supplying it. Mis-measured powder, or the wrong type, can be very dangerous.

Most importantly for a new owner: have a safe storage space (a proper safe!) and get adequate training and range time with your new rifle.