I like the idea . It represents practical rimfire accuracy for most folks ,but I would suggest a scoring change that will prevent ever needing to go to quarter inch bulls.
Go to a 200 point match.
0 points for a miss
5 points for any shot touching the bull
10 points for any shot that hits inside the bull and DOES NOT break the outer edge of the bullseye.
Basically- to score 200 points you would have to shoot a 20 shot group measuring .26 " center to center that is PERFECLTY centered inside that bullseye. I doubt that will happen. At 25 yards? Maybe. At 50? no way.