Tag Archives: Sean Murphy

PROOF Research’s Greg Hamilton and Sean Murphy Take Top Tough Man Honors at 2020 Mammoth Sniper Challenge

The grueling three-day precision rifle shooting competition brings the best-of-the-best shooters together to test their shooting skills in a mentally and physically challenging environment. Columbia Falls, Mont. (January 2020) – The Grunt Style Vortex Optics Mammoth Sniper Challenge wrapped up … Continue reading

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