The hole intercepted 118.9m at 4.12g/t gold from 606.6m and ended in mineralisation.
Antenna lies between the previously mined Cove and McCoy gold-silver mines at the Nevada project.
Under a January 2018 deal, Barrick has the option to earn 60% of the project, surrounding Premier's 100%-owned Cove deposit, by spending US$22.5 million by mid-2022.
The pair also have a joint venture at the South Arturo mine in Nevada, where development work is setting the stage for a return to commercial production next year.
Premier president and CEO Ewan Downie said the two companies' geological teams had worked closely to identify multiple high-quality targets at McCoy-Cove for the current drill programme.
He said the Antenna intercept was "one of the most significant ever drilled on the property" on a grade-thickness basis.
Premier ended 2018 with US$43.9 million in cash and equivalents and expects to produce 75,000-85,000 ounces of gold and 225,000-250,000oz of silver from its Mercedes mine in Mexico this year.
Its shares have ranged from C$3.07 to $1.39 over the past 12 months.
They closed up 9.15% or 14c to $1.67 yesterday, valuing it at $351.4 million.
