Sheriffs are authorized by statute to open their shooting ranges for public use when the range is not being used by the sheriff’s personnel. The sheriff may establish reasonable regulations for use of the range in order to promote the full use of the range without interfering with the needs of the sheriff’s personnel. The sheriff may also charge a reasonable fee for people or organizations using the range and may require  users to make improvements to the range. T.C.A. § 38-8-116.