Scott Gump of Merritt Island, Fla., struggled in the cold wind yesterday, but his final-round 78 was good for a one-shot victory over Jim Estes of Greenbelt in the 72-hole Middle Atlantic Amateur at Chartwell.

Gump, medalist and semifinalist in August's U.S. Amateur, finished with a 6-over-par total of 294 to edge Estes, who drew the closest he had all day with birdie on the final hole and finished with 75 -- 295.

Gump started the day with a four-shot lead over Estes, but saw the advantage reduced to two after Gump bogeyed 15.

Estes drove behind trees and took bogey at the 17th hole to fall three back before he birdied the final hole and Gump bogeyed it.

Gump, eligible for next year's Masters after his U.S. Amateur showing, proved to be a golfer for all seasons. He opened with 70 and 75 in high winds. Saturday's 71 was in an all-day rain and yesterday he teed off in a ski cap.

"It was rough conditions, plus I played bad today," said Gump, 21, a recent graduate of the University of Miami (Fla.). "I'm ecstatic with the victory."

Estes, of Bethesda Country Club, who has played little since breaking his wrist in a June car accident, was the only one who made a run at Gump as scores soared.

Curt Coulter, a University of Virginia player, was third at 76 -- 300, followed at 303 by Buddy Peoples of Crofton (80 with a triple bogey on No. 9), Jack Vardaman of Congressional (74), Joe Dennis of Waterbury, Conn. (75), and Todd Shore of Boca Raton, Fla. (73).