Billboard Hard Rock Albums Chart for the week ending 4/22/17.  Top 25 albums ranked by multi-metric ranking, including traditional album sales, track equivalent albums (TEA) and streaming equivalent albums (SEA).  The chart is compiled by Nielsen Music. THIS WEEK’S TOP 25: MASTODON – Emporer Of Sand DEMON HUNTER – Outlive METALLICA – Hardwired…To Self-Destruct METALLICA […]