Mine is JSB 10.3 and H&N 10.6. Both about the same accuracy. JSB at 920 FPS and H&N at 910 FPS with power selector on Medium. Accuracy verified 5 shot penny size groups at 52 yards.
Bantam - #1 - AA 10.3, #2 - JSB 8.44 Compatto #1 - JSB 8.44, #2 - AA 10.3
I've had my Compatto for almost a year and I like it so much I bought the Bantam last month. I had a regulator put on my Compatto but I still only get 25 - 27 shots before the pellets start to drop. The rankings are probably more attributed to my shooting than a true accuracy test. These are off a Caldwell Fieldpod out of my garage at 32 yards. I bought a Rowan Single Shot Loader and I use it on both rifles.