It is illegal to discharge a firearm withing 200 yards of another house or within 50 yards of a public road. I would check with your local PD to make sure before doing any shooting.
Source for your 200 yards assertion? 50 yards of a public road I've read in the OCGA, haven't seen anything that says 200 yards of another house is illegal though...
OCGA said:16-11-103. Discharge of gun or pistol near public highway or street
A person is guilty of a misdemeanor when, without legal justification, he discharges a gun or pistol on or within 50 yards of a public highway or street.
Cobb county ordinance said:Sec. 86-5. - Weapons discharge.permanent link to this piece of content
(a)It shall be unlawful for any person to discharge a firearm, air rifle, pellet gun, slingshot, crossbow or other similar device into or over property belonging to another person or entity without first obtaining written permission from that person or entity.
(b)In addition to the penalty provided for in section 86-1, if the person charged with violating this ordinance is a minor, it will be within the discretion of the officer issuing the citation to issue a warning. If this is done, a duplicate of the warning will be sent to the minor's parents or legal guardian by certified mail.
(c)The provisions of this section shall not apply to:
(1)Persons who discharge one of these devices in defense of person or property;
(2)Law enforcement officers in the performance of official duties;
(3)Military forces of this state or the United States in the performance of official duties.
If the round doesn't leave the property you are on you seem to only need to be far enough from a public road and to have written permission from the person who owns the land.