My autoloaders are more sensitive than my pumps with regards to hull condition. For hunting I only use my best hulls. For practice, informal clays, and varmits around the house I re-reload hulls until they will no longer hold the shot. A Win-AA with multiple splits will contain 1 1/8 oz of #4 rather well. Missing petals mean a slug hull.
My autos are more likely to spit shot out of a hull split than my pumps. Probably because of a more violent trip from the mag to the chamber. Those pellets floating around in the trigger group have tied up my shotguns in the past, #9 - #7 1/2 seem to be the worst.
I have yet to have a failure to feed or chamber.