True width is unknown, with "multiple high-grade gold and silver zones" said to have been drilled.
Riedel has drilled 4190m of a planned 5000m maiden campaign with further results due in April and May.
Riedel completed the transaction involving Kingman late last year, with Kingman's vendor, Flagstaff Minerals, partly-owned by Riedel's recently appointed chairman Mike Bohn.
Bohn is also a director at ASX duo Ramelius Resources and Mincor Resources.
Riedel is effectively earning up to 80% of Kingman via various staged payments, issuances of shares and exploration expenditures.
Kingman features high-gold and silver grades seen in historical mining and replicated in a 2019 drill program.
Riedel raised A$2 million to fund the current drilling late last year by issuing new shares priced at 0.55c each.
Shares in Riedel were up 61% to 3.7c in morning trade, capitalising the company at $31 million.
