A 51-year-old Summerville man described as an avid gun collector was found dead of a gunshot wound at a shooting range Thursday morning and investigators are trying to determine what happened.

William M. Rust, who lived in the Ashborough subdivision, was found dead about 7 a.m., but he probably died Wednesday night, Dorchester County Coroner Christopher D. Nisbet said.

Dorchester County sheriff's deputies were called to the Palmetto Gun Club, a private shooting facility just off S.C. Highway 61, by a person who found Rust lying on the ground near one of the shooting huts. There were several guns around Rust, who was an experienced gun enthusiast, Nisbet said.

Rust, who worked in the information technology department at the Medical University of South Carolina, had called his wife about 5:10 p.m. Wednesday and told her he had a new gun and he was going to go to the range, Nisbet said. The gun with which Rust was shot was one that he had owned for several years, the coroner said.

Rust is thought to have died Wednesday night and because of the injury to his heart, he died quickly, Nisbet said.

"The perplexing thing about this is the manner of death," Nisbet said. "I will need further investigation before I can rule on the manner of death."

A coroner has to rule if a person's manner of death is homicide, suicide, accident or unable to be determined, Nisbet said.