06-21-2012, 05:21 PM
I bought a used GDMR upper a couple of months ago. I built a lower using a stripped AA Grendel lower, PRS stock, Timney trigger etc. Threw on a cheaper Leapers 4-16 x 50 scope. Took the build to my range and was not impressed. Windage was good but elevation wandered about 1 1/2" in a 5 shot group. Bought a used Nikon Monarch 8-32 x 50 and went back to the range with 123 Lapua Scenar. Best group was about an inch. I have a 16" Grendel that shoots better groups at 100 yrds. I understand that the GDMR is for MUCH greater distances (twist rate for 200+) but thought that it would perform better at closer range. Thinking maybe the heavier bullets don't stabilize yet at 100? Would the 100 Berger perform better?