April 4, 2014 A test of the Lehigh Defense 300 AAC Blackout 194gr Subsonic Maximum Expansion Ammo. Share this gun video:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)