I had nothing but problems with AW mags (tried all 9) with HRD spacer kits and Lapua 6BR brass with 108ELDM. Probably an 80% stoppage rate (At least one stoppage out of each magazine, generally towards the last few when spring tension was easing off). It was amazingly accurate, easy to shoot but feeding from double stack mags didn't work.
Now with the 6GT, Alpha brass, 110gr ATIP' it's maybe a 0-5% stoppage rate per magazine (From the couple of hundreds of rounds fired, it's maybe had 2 or 3 hiccups, which were probably at least partly my fault short stroking). Without spacers. Absolutely a different kettle of fish. Running them at 2830fps, not pushing them at all. I think 6CM is too fast for our ranges, 6BR didn't feed, the 6GT is a good in between with plenty of gas left in the tank if needed for hand loading.
I run 6bra flawlessly in the vision chassis with hrd kits...
With no shim or whatever else AI is using on the gen 4.63v.2.1 lol
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