The buzz about the Grascals’ self-titled 2005 debut reached out of bluegrass circles and into the larger country-music world. So it’s no surprise that on their sophomore effort, the group welcomes a few heavy-hitting ringers: George Jones turns up on “Don’t Tell Mama,” Dierks Bentley good-naturedly trades verses with singer Terry Eldredge on “Being Me” and Steve Wariner adds fleet-fingered fretwork to his own “Hoedown in Motown.” But it’s The Grascals’ own tight harmonies and vibrant instrumental work that hold this set of originals and well-chosen country and bluegrass covers together.