Accurizing a Grendel - Accuracy Advice

[Eye_guy]

I built a Grendel from scratch going on about a year ago. I had a relatively limited budget, so couldn’t do a Kreiger, Bartlein, Proof, ect barrel. Parts availability was also an issue at the time, so at times I had to utilize what I could find. I used a Ballistic Advantage DMR 20” fluted barrel, a BCM MCMR 15” rail, an Anderson stripped upper, a PSA bolt carrier, a Geissele 2 stage trigger, and a 4x16 vortex scope.

I recently saw the Criterion video about accurizing an AR. I didn’t bed the barrel with loctite or lap the upper receiver.

I’d really like to get my Grendel to 1 MOA (preferably .75 MOA), right now I’m closer to 1.5 MOA. I’ve shot at least a dozen various handloads and that’s the best I can do. I’ve attached an image of my most most recent 200 yard grouping. That particular grouping was done with a Nosler ABLR 129 grain, with 26.5 grains of H4895. Ive tried Barnes, hornady SST and 3 other powders (CFE, 8208, H335) with similar or worse results. I handload for all my rifles, been doing it for a long time so I’d like to think I can rule out ammunition.

So my question is what if anything should I do? Try and utilize the BA 1 MOA guarantee, “accurize” per criterion’s procedure, come up with the money for a better barrel, try a different BCG or upper?

Thanks in advance