  The A-dependence of the saturation momentum and the scaling behavior of the
scattering of a small dipole on a nuclear target are studied in the
McLerran-Venugopalan model, in fixed coupling BFKL dynamics and in running
coupling BFKL dynamics. In each case, we find scaling not too far from the
saturation boundary, although for fixed coupling evolution the scaling function
for large A is not the same as for an elementary dipole. We find that $Q_s^2$
is proportional to $A^{1/3}$ in the McLerran-Venugopalan model and in fixed
coupling evolution, however, we find an almost total lack of A-dependence in
$Q_s^2$ in the case of running coupling evolution.
