GDMR @ 100yrds?

[LR1955]

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?

W2D:

You mean the Leapers scope didn't work? He, he, he.

As for the Nikon Monarch, it too has problems with durability. Have you checked that it will hold zero? After all, you bought it used.

And, the upper is also used.

Finally, unless you shot four or five each, five shot groups, and are confident in your shot calls, you probably can't claim something is wrong with the upper.

This is the first time I have heard anyone say a twist rate isn't good for distances under a specified number of yards. If you have a twist rate problem, it is because you are using a bullet that is too long for the twist rate. If you have a 1/9 or 1/10 turn twist on the GDMR and you are shooting the long 140's, then maybe. I doubt you have such a twist rate on the GDMR.

So, get some decent optics and shoot a few groups with good calls. Try some 120 Sierra Match Kings with 29 or 30 grains of 2520. If the upper won't shoot a 120 Sierra, most likely the barrel sucks and won't shoot anything well.

LR1955