Very new open shooter here. I don't know what's better or worse but from ~1500 rounds through the gun the most remarkable parts of using AA7 are small amounts of sludge in the crevices of the gun and powder sticking to the hopper/funnel and sprinkling all over my press. The gun doesn't feel too punchy and the dot is pretty trackable. That said, I'll probably switch to SWMP and rifle primers after I'm done with the current stock based on feedback.
Atlas Chaos 9mm
124gr PD JHPs
10.2gr AA7
CCI SPP
1.17' OAL
177PF