  We present a precision measurement of the top-quark mass using the full
sample of Tevatron $\sqrt{s}=1.96$ TeV proton-antiproton collisions collected
by the CDF II detector, corresponding to an integrated luminosity of 8.7
$fb^{-1}$. Using a sample of $t\bar{t}$ candidate events decaying into the
lepton+jets channel, we obtain distributions of the top-quark masses and the
invariant mass of two jets from the $W$ boson decays from data. We then compare
these distributions to templates derived from signal and background samples to
extract the top-quark mass and the energy scale of the calorimeter jets with
{\it in situ} calibration. The likelihood fit of the templates from signal and
background events to the data yields the single most-precise measurement of the
top-quark mass, $\mtop = 172.85 $\pm$ 0.71 (stat) $\pm$ 0.85 (syst) GeV/c^{2}.$
