I shot 30 rounds at 300 yards today and other than the fouling being harder than when I shoot GG bullets, I'll say they are every bit as accurate as I had hoped. As I shoot from a very solid platform and use a Randolph front rest and Edgewood bag, the rifle can't be held tighter/better.
I find that I need a few less points to reach 300 than using GG too. My confetti wasn't cut in perfect strips, but they were cut. I fired 1 round for verification, made a sight change and fired 9 remaining rounds from that recipe on a 12" square piece of steel. Very slightly over MOA. The 9 shots on steel were a 3.5" group. Nice stuff there. You know when one of the bullets hit as it jumps like crazy and makes a very nice ring.
I've been considering scoping this rifle, but I don't know if an MVA will make it any better.
The rifle liked both the Brooks elliptical and the Accurate flat nose equally, surprisingly. We'll see if a 16 twist will stabilize a 1.4" bullet to 600 as soon as I get a chance.