In the initial days of purchase, spray tips provide an oval spray pattern. However, with time, the tip starts to wear out, and the oval shape slowly transforms into a circle, spraying more paint into a smaller area.
Another way to know if your tip is worn out or not is if you start observing the effects of tails or fingers. Usually, a RAC V tip, like the one that comes with the Graco X5 and the Graco X7, will last for approximately 125 gallons per year.
However, it greatly varies on the type of paint that is being sprayed by the painter and the pressure at which they are spraying.