I shoot at about 20 to 25 yards using 1/4 inch colored dots lined up in rows on a sheet of paper. I had to go through about 20 different pellet types finding the ones that will actually hold a quarter of an inch. There are a couple of pellets that will hold 3/8 of an inch really well so it's fairly easy to hit them consistantly.
A friend of mine is quite competitive so I had him over to shoot dots for a quarter a dot. It was a blood bath as he hasn't done the work finding what pellets his rifle shoots best. I was laughing so hard it was hard to shoot. I asked him if he could hit a 1/4 inch dot and his reply was yeah if you can I can. I asked so then you'd be okay with a quarter a dot? It was on.
Mine is a Beeman R9 special edition with a Swift Premium Airgun scope in 6-20x, that's a sleeper quality $275 scope that's made for air rifles.