U2 is on track to score its seventh No. 1 album next week on the Billboard 200 chart, as its "No Line On the Horizon" set led Nielsen SoundScan's March 4 Building chart by a wide margin.

"Horizon" will likely charge in with the best sales week the Billboard 200 chart has seen since December, and could do more than 400,000 in its first week, if not more.

Billboard estimates the seven merchants who report to Nielsen SoundScan's Building tally -- Trans World Entertainment, Best Buy, iTunes, Starbucks, Borders, Target and Anderson Merchandisers -- comprise about 60% of all U.S. album sales. The March 4 Building chart reflected unweighted sales through the close of business on Tuesday, March 3.

U2 is working the U.S. TV circuit hot and heavy this week, with a five-night stand on CBS' "Late Show With David Letterman" and a performance scheduled for Friday, March 6 on ABC's "Good Morning America."

The band's last studio album, "How to Dismantle an Atomic Bomb," was released during Thanksgiving week of 2004 and bowed with an impressive 840,000. "Horizon" is not expected to start with a number that large, especially since the always-busy shopping frame of Thanksgiving week undoubtedly helped "Bomb's" big bow. So far, "Bomb" has moved 3.2 million copies in the U.S.