I was going to post some of my 6" groups but didn't think anyone would be interested. [:-] On a good day, when I'm right, when the weather is right, when the planets are properly aligned.......I have sometimes shot the sub-moa stuff.
But I think Ed Mehlig can do it pretty consistently. His groups on
this page were shot all on the same day using bullets that I and another fellow cast and sent him. His targets have the half-inch squares. I've got three groups in that conglomeration - the one with the Mose bullets are the first three out of my barrel (I think they were the first three out of any barrel).