Building AR-10 in .260. DPMS upper with 24 inch barrel with DPMS lower, 2 stage trigger (havent picked out yet) magpul PRS stock, with leupold mark 4 LR/T 8.5-25(purchased) with 20 moa AR rings (havent decided on bases). With this type of set up in an AR-10 what kind of distance is it possible to shoot? would appreciate the feedback to see what others are shooting.