COB used those shells in 28g here last year at our four day event. He was shooting a graded 28g and one of the shells bulged his barrel. If I remember correctly the manufacturer said they would take care of his gun. That's the last I heard. You'd have to ask COB what became of the gun.
I've used their shells in 12g and 20g with no problems. I shot in a charity event at Hausmann's where the same shells were given to every entrant, also with no problems. As for "cheap", they are certainly not! Morris actually pressure tested their shells and said they were truly low pressure as advertised.
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