Serious feeding problem and sighting in issue.

[VASCAR2]

More specific information on your build might help us diagnose a potential problem. Barrel length, gas port location (carbine, mid length, Rifle length), fixed gas block, adjustable gas system, suppressor in use, buffer and spring in use. The key elements to an accurate AR-15, quality barrel, good trigger and good optic/sights. It is also helpful to know which specific magazine your using in your 6.5 Grendel.