Th biggest issue for them seems to occur in the .40 S&W and 10mm platforms w/their unsupported chambers. When you couple an unsupported chamber, with a high chamber pressure and buildup due to a lack of cleaning and bullets with an insufficient Brinell hardness for the given velocity/pressure spike and then shoot jacketed bullets after the fact which don't obturate the same way, things can go boom. I've witnessed it twice, once in a G22 and once in a G20.
I have no issue running hardcast bullets nor cleaning properly, I just wanted the A.M. barrel to eliminate the "Glock waist" courtesy of the unsupported chamber and thus eliminate the additional full-length resizing step w/the Redding GRX die so the brass would easily chamber in any of the 7x .40S&W chambered weapons between myself, Dad and 2 good friends.
I will be acquiring a 10mm A.M. barrel for a friend's GenIII G20 after I acquire the weapon as I thoroughly enjoy shooting it, but the unsupported chamber issue still remains. It's VERY accurate though and pretty soft shooting with standard loads. I haven't tried it with Underwood, CorBon, Garrett or other truly heavy loads yet though so we'll see.