November 8, 2014October 21, 2013 In this episode of Mail Call Mondays, John McQuay discusses 5R rifling, semi-auto velocity loss and adjusting your stock. 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)