The man police call the ".44-Caliber Killer" has struck again, this time only wounding his two intended victims, police said yesterday.

Seventy days after the last shooting, another young couple was wounded in Queens early yesterday as they sat in a parked car.

The gunman, who calls himself "Son of Sam," has killed five persons and wounded four others in the past year.

Chief of Detectives John Keenan said ballistics tests confirmed that yesterday's bullets came from the same Bulldog .44 revolver used in previous shootings. He said the shooting had yielded important new information about the killer, but he did not elaborate.

The shootings began last July 29. All the young female victims have had dark hair, usually shoulder length. The shootings have occurred in the northwest Bronx and in neighboring Queens, mostly on weekends, and often the victims have been seated in parked cars.

In a letter to New York Daily News columnist Jimmy Breslin last month, the confessed gunman wrote: "Mr. Breslin, sir, don't think that because you haven't heard from me for a while that I went to sleep. No, rather, I am still here. Like a spirit roaming the night. Thirsty, hungry, seldom stopping to rest."