rowcifer Private Full Member Minuteman Jul 16, 2007 71 9 USA Jun 2, 2010 #1 Jun 2, 2010 #1 Looking at a 260 upper either DPMS or custom build with an 18" or 20" barrel. About what could i expect for velocity using 123 or 139 gr Scenars with either barrel legnth?
Looking at a 260 upper either DPMS or custom build with an 18" or 20" barrel. About what could i expect for velocity using 123 or 139 gr Scenars with either barrel legnth?
R Rovieairto Sergeant Full Member Minuteman Oct 4, 2007 633 0 51 Minneapolis MN. Jun 4, 2010 #2 Jun 4, 2010 #2 Re: 18" or 20" 260 Upper 139's around 2600 ft/sec at 20" 123's 2825 ft/sec at 20"
