I have found very little difference between AA, JSB and Daystate Sovereign until you get to fourty yards or more. Then I have found that Sovereign seem to be the best all round pellet for tight grouping,
AA were next but I found that strangely every now and then (usually between about 15 - 30 pellets), I would get a flyer, even after weighing them, so I have no idea what is going on there.
All JSB great up to 30 - 35 yards then depends on the batch.
So in conclusion I have spent the last few months buying as many sovereigns as I can but have no idea why they were not popular and production stopped?