Well I finally got to the range for the first time since my ACII came back from the warranty center. They said they polished the ramp and throated the barrel. Not sure why they touched the barrel as the cartridge never got close to the barrel before jamming.
Anyhow, I ran about 150 rounds through it with 4 Tripp mags, 1 CMC mag, and 2 ACT mags, always starting out with a +1. I had 3 or 4 rounds nose dive on me but it was always the first round out of the CMC mag.
I know the CMCs are quality mags, but apparently this gun just isn't going to get along with them. If that proves to be the case after a couple more range days, I guess I'll just relegate the CMC to being a 'Barny' mag.
or, I could just get another gun to go with it!