Authorities in New Mexico said they’ve recovered hundreds of rounds of ammunition from the set of “Rust” following the fatal Alec Baldwin-involved shooting of a cinematographer last week. “Through the execution of search warrants, we have collected about 600 items of evidence,” Santa Fe County Sheriff Adan Mendoza said Wednesday during a press conference. “These include but are not limited to three firearms, approximately 500 rounds of ammunition, and several pieces of clothing and accessories.” Authorities also obtained the spent shell casing from the bullet that was believed to have been fired by Baldwin during filming. “We suspect that there was other live rounds that were found on this set,” Mendoza continued. “This investigation is active, so I won’t comment on how they got there.” The type of gun used in the incident was identified by Mendoza as a Pietta Long Colt .45 revolver, the sheriff added. “There was other …