Sounds like your very happy with your new sight and the results reflect your enthusiasm.
FWIW, a full sized 50 yard target has the same size scoring rings as the 25 yard target. The only difference for a 50 yarder, is the aiming black is extended into the eight ring to keep the black ball optically the same dimensions for the longer distance.
Perhaps what you meant to say was your were shooting on a standard 15 yard reduced 50 yard center target. If that's the case, then this is a significant accomplishment considering the size of the scoring rings on that reduced sized target.