I want him to be a gentlemen. I've only ever heard him crow, never call out for predators or call the hens over for food.
it is natural that roosters chase hens. the problem is that pullets are not hen and do not know what is going on. I have the same problem but time is the only solution. if you can, separate pullets from him till they get older.
In my case, my cockerel was about 4 months old when started mating and pullet about 5 (hybrid chicken, red sex link pullet, not sure about cockerel, RIR over either RIW or W leghorn).