how fair can i reach from claxton ga with a pro 106
There are many factors that determine what you will be able to receive with any scanner.
Things like your location, elevation, antenna, etc; and the transmitter's frequency, location, elevation, output power, etc.
You might pick up a signal from 50+ miles away, yet be unable to pick up another signal from half that distance. GRE scanners tend to be fairly sensitive, so they can receive weaker signals fairly well (GRE makes the Pro-106).