I've ran through about 2-3 cases of them. And few other guys I hunt with tried them. This year one of the guys i hunt with's gun (SBE 2) decided it didn't like the hypers and wouldn't function properly with them (3 1/2 2s & bbs). Switch shells problems gone.
Last year my gun (SBE 2) decided that it didn't like to cycle the 1 1/8 ounce hypers....but would cycle 1 ounce dove loads (go figure). I also didn't like the results i got goose hunting (3.5 bbs), misfires, cycling issues, just flat out missed
you name it.
I won't buy anymore myself.
But I do have to admit those 1 1/4 ounce number 4s are wicked in a timber hole