  We calculate shell-model matrix elements of the axial-charge exchange current
operators that have been obtained up to the next-to-leading order from
heavy-fermion chiral perturbation theory. It is found that loop corrections to
the soft one-pion-exchange contribution are small (around 10 \%) and have no
significant dependence on the nuclear mass number or on the valence-nucleon
orbits. These results render further support to the chiral-filtering
conjecture.
