  We present a fit to observational data in an asymmetric self-interacting dark
matter model using our recently calculated cross sections that incorporate both
$t$-channel and $u$-channel exchanges in the scattering of identical particles.
We find good fits to the data ranging from dwarf galaxies to galaxy clusters,
and equivalent relative velocities from $\sim 20$ km/sec to $\gtrsim 10^3$
km/s. We compare our results with previous fits that used only $t$-channel
exchange contributions to the scattering.
