new lawn

Hello All,
I just planted some zoysia grass seed for the first time about 2 and a half weeks ago along with new irrigation that I designed my self. I can see grass growing mostly everywhere but I have a couple dry spots with no growth yet in between sprinklers. It seems like the water shoots right over and is only watering next head missing in between.
My thoughts are to decrease my sprinkler range or put a temporary sprinkler out until the zoysia is grown and needs less water.
What do you think?
Thanks