It intercepted 188m at 4.4g/t gold from 64m, including 23m at 8.9g/t, plus a further 66m at 1.5g/t from 365m in hole 121026.
It's the latest in a series of "spectacular" results ahead of an initial resource expected around August.
Rupert recently expanded its fully-funded 2021 drilling programme to 60,000m.
"Ikkari is emerging as one of the best new discoveries of this gold cycle, with a near surface, high-grade component allied with non-refractory metallurgy in a top tier jurisdiction in close proximity to infrastructure," CEO James Withall said.
The past-producing Pahtavaara property also has a fully permitted mill.
It lies about 50km from Europe's largest gold mine, Kittila, owned by Agnico Eagle Mines which has a strategic 14.9% stake in Rupert.
The explorer had raised C$25.6 million in placements last July priced at $3.20 per share.
Its shares (TSXV: RUP) closed unchanged yesterday at $4.50, valuing it about $744 million (US$590 million).
