Hope this helps; it's from the DNR web page (I think).
If driving from Atlanta, I-20 east to exit 98. Take a right and go down the road (south). You will go until you get to the town of Mansfield, GA. From the train tracks in the middle of town you will travel 2.7 miles, when you will come to a sign for Charlie Elliot WMA. Take a left, and the range is 1.4 miles down the road, on the left. The paved road will turn into a dirt road just before the range. There is a sign indicating where the range is, and you can see it from the road. The range is about 1 hour driving time from downtown Atlanta.
For a free outdoor 100-yard range, it's pretty nice. No full-auto allowed. You must provide your own targets and target stands. Clay targets on the berm are fun to shoot. Benches are available on both the rifle (100-yard) and pistol (50-yard) ranges and are first-come, first-serve.