CHART MURMUR: Jay-Z's Magna Carta Holy Grail (Roc Nation) dominates this week's Building Album Sales Chart, with first-week sales likely to outstrip those of his prior several releases. But what about the chart's other notable debuts, such as those from Epic's Ciara and KidinaKorner/Interscope's Skylar Grey? Meanwhile, how will reliable sellers like Republic Nashville's Florida Georgia Line, KidinaKorner/Interscope's Imagine Dragons, Roc-a-Fella/Def Jam/IDJ's Kanye West, Columbia's Daft Punk and RCA's 2013 sales champ Justin Timberlake hold up? There's only one way to know for sure: Keep checking. (7/16a)