Hi m82g, welcome to the forum.
One of the experts will be along soon to explain how to get the maximum range and range rings onto your map. There are a couple of long posts which have a lot of out-of-date information before the best code was found. If you have a couple of spare hours try looking through these.
What is your setup?
[Edit] Just looked at your stats and you are out-performing everyone else in your area ! Good work.