A while back Dave (schuetzendave) told me they'd had better luck with AA #9 than with 4227.  I decided to do a test today with my CPA and it seems promising.   The muzzle velocities were way more consistent and I didn't even have to raise the muzzle like I do with my IMR-4227 loads.  It burned a little cleaner too.  I used Fed LR magnum match primers.

Best 100m 5-shot group was about 1380 fps and measured 0.6".   There also seemed to be something good at around 1420 fps but the winds were twitchier so it's not a fair comparison.

Chris.