EncoreJoe, 777 is more expensive so they make more profit. I have tried them all except Black mag3 which I have only been able to get limited amounts ofnone have shot better than Pyrodex the spikes on the pressure gage tell me that its not smart to use much more than 110 gr of 777 ;App gives just about the same pressure as pyrodex and is almost as clean as smokless, but needs to be kept dry as it will attract moisture and then it wont shoot the same, it works just fine if you keep it next to the dehumidifyer in the gunsafe. Lee