  We solve the coupled Boltzmann equation for the system of light photinos
interacting with pions and $R^0$'s (the gluon-gluino bound state) to determine
the relic abundance of light photinos in the light gaugino scenario. Cosmology
bounds the ratio r of the R^0 mass to the photino mass to be less than about
1.8. We also use a model Lagrangian embodying crossing symmetry between the
$R^0 \leftrightarrow \photino \pi \pi$ and $R^0 \pi \leftrightarrow \photino
\pi$ reactions to identify cosmologically favored regions of $R^0$ lifetime as
a function of $R^0$ and photino masses.
