Add the ground beef, salt, and pepper to a 6 quart or larger slow cooker.
Set heat to low, cover, and cook for 1 hour. Use a potato masher to break up the meat.
Repeat breaking up the meat with the potato masher ever 2 hours until the meat is cooked through. This should take about 6 hours for 7 pounds of meat in a 6 quart slow cooker, but adjust time as needed and cook until meat is no longer pink.
Drain fat, if desired, before using or freezing.
Portion meat out into freezer bags and freeze until ready to use.