I had issues with AW mags I had, turns out they were AW mags for R700 footprint actions. Bought two ATX
optimized mags from MH earlier this week. They needed some rounds ran through them to break in so Ive ran about 150 between the two of them, just an empty case and some take down 109s I have. Im up to about 90-95% feed rate. So definitely think just getting them worn in will be the ticket. They have 7 layer spring instead of the other 4 layer. Really stiff when I got them. But they have loosened a little, feel a little stronger than a PMAG follower spring tension.