The release makes the difference. Learn to release at the proper second and that can give you another 10 meters. The smoother the discus cuts the wind, the further it will fly, just like any saucer. Practice 20 minutes with a frisbee just to see if you can get it to fly without the wobble, then take a small pillow in your home and practice your turns and releasing it the same time and the same spot on a wall to give you accuracy.