Why is this tabulary narrower than the specified width?
\documentclass{article}
\usepackage{tabulary}
\newcommand{\mytable}{%
\begin{tabulary}{0.5\textwidth}{@{}L@{}}
Text\\
Text\\[2ex]
\end{tabulary}%
}
\setlength{\parindent}{0pt}
\begin{document}
% Why are these less than 0.5\textwidth?
\mytable
\mytable
\mytable
\mytable
\makebox[0.5\textwidth]{\mytable}
\makebox[0.5\textwidth]{\mytable}
\makebox[0.5\textwidth]{\mytable}
\makebox[0.5\textwidth]{\mytable}
\end{document}

