Great-Kazoo: Thanks for the input... appreciate you sharing what you witness on the range.
I have been reading up on the reliability of the AR style platforms and cycling issues seem to be the primary complaint. I do have a good sized amount of the Black Aces 00 2 & 3/4" @ 1425 fps... but I have more of the 1200ish fps loads - so....
That Mossberg 940 JM Pro has my attention...