Here was the result of shooting for a group at 75 yards with a red dot on the rifle. I could still work on it but it is probably a result more of recoil fatigue on my part than mechanical accuracy of the gun. I only had four to shoot that day after sight in and if you discount the last shot low left, 3 of them were within 2 inches... not bad for a bullet that is 3/4" in diameter!
Getting roughly 1050fps with this load. It is a blast to shoot off hand and the audible sound of the bullet moving through the air is an experience!