85 wagon makes grinding sound from front passenger side wheel when braking and wheel sometimes locks up

So randomly, one day, I go to drive the wagon and then I brake coming up to a stoplight, and the front passenger wheel is making a grinding noise as the wheel turns it get stronger almost like there's a high spot on the rotor, then it locks up here and there, but the rotors and pads are new - less than 250 miles on them - and brakes have been bled