Sorry to hear about the problems with the AA-HS brass. I also have a CG .410 and the chambers are too tight...any imperfection and the shells will not chamber.
I have a whole bunch of AA-HS 28 ga from last year that did the same thing. Half were split in the box and the other half split on the first firing. Talk about POed ! And, on top of it Winchester never sent the $20 rebate I had coming for the flat.
This happens from time to time with both the sub-gauges in Winchester. Remington too, so I've heard. Contact them and give them the lot # of the shells you have. They will do you right. They may want the shells back so I would shoot anymore until you contact them. Good Luck and break em all JEff