We report ground- and excited-state dipole moments and oscillator strengths
(computed in different ``gauges'' or representations) of full configuration
interaction (FCI) quality using the selected configuration interaction method
known as \textit{Configuration Interaction using a Perturbative Selection made
Iteratively} (CIPSI). Thanks to a set encompassing 35 ground- and excited-state
properties computed in 11 small molecules, the present near-FCI estimates allow
us to assess the accuracy of high-order coupled-cluster (CC) calculations
including up to quadruple excitations. In particular, we show that incrementing
the excitation degree of the CC expansion (from CCSD to CCSDT or from CCSDT to
CCSDTQ) reduces the average error with respect to the near-FCI reference values
by approximately one order of magnitude.Comment: 14 pages, 8 figures (supporting information available