July 3, 2014 A clear gel test of 460 Rowland ammo from Underwood Ammo. The test pistol is a Glock 21 with 460 Rowland conversion kit. 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)