June 19, 2013June 3, 2013 Review and test of the .223 Remington 55 gr leadless HP from DRT Ammo – Dynamic Research Technologies. 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)