AC/DC’s “Black Ice” posted the second-biggest sales week of the year, moving 784,000 copies to trail only Lil Wayne’s “Tha Carter III” debut week tally of 1 million sold.

The Columbia release is being sold exclusively at Wal-Mart, Sam’s Club and AC/DC’s website. It is the third impressive sales week for a Wal-Mart exclusive by a client of Irving Azoff’s Front Line Management, which has orchestrated these deals for so-called heritage acts.

“Black Ice,” AC/DC’s first chart-topper since “For Those About to Rock We Salute You” in 1982, follows the Eagles’ “Long Road Out of Eden,” which sold 711,000 in its first week in November, and Journey’s “Revelation,” which moved 104,000 in its opening stanza in June. There have been rumblings that Fleetwood Mac will take a similar tack.

AC/DC is the rare behemoth capable of blocking a “High School Musical” project from the top slot. Disney’s soundtrack to the pic “High School Musical 3: Senior Year” sold 297,000 in the week ended Sunday, according to Nielsen SoundScan. The film grossed $42 million in its opening weekend, and the disc, like most soundtracks, should see a sales spike the week that the soundtrack is available simultaneous with the film being in theaters.

Gospel duo Mary Mary’s “The Sound” (My Block/Columbia) sold 37,000 to open at No. 7.

A full week of sales following Adele’s appearance on “Saturday Night Live” pushed her “19” to No. 11 from No. 46. The album sold 25,000, up from 11,000 the week prior.

Hank Williams III’s “Damn Right Rebel Proud” (Sidewalk) opened at No. 18, a career best, with 20,000 sold. Fellow country singer Lee Ann Womack saw 17,000 copies of her MCA Nashville release “Call Me Crazy” go home with fans to open at No. 23.

Among other debuts: Escape the Fate’s “This War Is Ours” (Epitaph) moved 13,000 (No. 35); Of Montreal’s “Skeletal Lamping” (Polyvinyl), 12,000 (No. 38); Craig Morgan’s “That’s Why” (BNA), 12,000 (No. 39); Brett Dennen’s “Hope for the Hopeless” (Dualtone/Down-town) 11,000 (No. 41); and Labelle’s “Back to Now” (Verve), the trio’s first album in 30 years, 11,000 (No. 45).

Neil Diamond, who was chosen last week to receive this year’s MusiCares person of the year award during Grammy week, saw his “Home Before Dark” return to the top 200, selling 3,000 copies to log in at No. 198.