That last pattern in the video at 300 yd was mighty good, although it was with a solid bench rest rather than conventional prone position. I think probably there was a pretty good drop at that distance.
That was a pretty nice looking piece in the video. I really liked the dark oiled color of the wood if that Inland carbine. Someone has taken good care of it. I sold my own Carbine last year--desperate for cash. Wish I hadn't, but . . .