Accurizing a Grendel - Accuracy Advice

[Eye_guy]

One of the primary reasons I went with a Ballistic Advantage barrel is weight. That particular barrrel weighs 33 ounces. If I ultimately end up making a change I want to use a 20” barrel and keep it at or under 2 lbs. a Proof barrel would get me there, but its outside my budget. What are my other options? Something that will be almost certain to deliver 3/4 MOA.