NEW YORK (AP) — Melissa McCarthy notched her first No. 1 weekend box-office debut as a leading lady with the $30 million opening of her espionage comedy "Spy." According to studio estimates Sunday, McCarthy's latest film with director Paul Feig bested a varied field of action, horror and a resurrected HBO series. Last week's top film, "San Andreas," the disaster movie starring Dwayne Johnson, slid to second place with $26.4 million. "Insidious: Chapter 3" opened with an estimated $23 million, a strong debut for the low-budget horror prequel. But HBO's "Entourage" failed to compete with any of those releases. It made $10.4 million over the weekend and has brought in a five-day total of $17.8 million since opening Wednesday.