GR Silver Mining (CVE: GRSL- OTCQB: GRSLF) CEO Marcio Fonseca joined Steve Darling from Proactive with news the company’s latest drill results from the underground Plomosas Mine Area has shown wide and high-grade results including 83 m @ 420 g/t AgEq.Fonseca telling Proactive the results are showing potential for size and scalability in the geological model to host attractive precious and base metals mineralization in areas close to existing underground development.