6mmAR Speeds??? Possible 18" build

[StoneHendge]

I'm getting 2740 over 41 gr of H4350 with 140 RDFs with no (timing) ejector marks. That's almost unheard of in a gas gun - most can't even get close to max with 140s. I cheated and worked up with the gas off. My "mild" load is 40.7 H4350 with 130 Norma GTs at 2810. Both could do < 1/2 MOA if I could. Best of all, they have almost the same POI. I spent way too long on load development before I figured out my scope was bouncing around inside of a 1.5" box due to insufficient rings, so I'm done with it!