I was wondering what kind of velocity you guys are getting out of lilja 20 inch ar10 barrels in 260 remington. I put my barrel on a mega upper and just put about 60 rounds through it this weekend. My load is a 142 matchking with remington brass,br2 primer and 41 grains of h4350. I chrono using a magnetospeed and its running 2450 which is dead slow. The groups are at a half inch so i stopped there until after i seen the chrono results. Then i worked up to 42.6 and seen presure signs and the groups really start to open up. I also have a dpms 24 inch that runs 2675 with the 41 grain load and a dpms 18 inch that runs 2575 with the same load so i have no idea why its so slow. Any help from all you guys would really be appreciated.
