Hard to know if a Waco Sinker or Bola Stone.
Most sinkers are a bit more oblong and most often 'notched' on the ends rather than grooved about the circumference (though some are).
That sample is pretty rough and the groove appears to be 'pecked'.
I enjoy 'artifact' hunting as much or more than hunting game.
Found every point/blade in this group in a single day of digging in a small camp site on the headwaters of Bull Creek in Austin, Texas, 1975. My Aunt used to own the property.
Congratulations on your find and thanks for sharing.