If everyone had the problems with crud-ring I did no one would use 777. The only thing I eve found that really made it useable in AR temperature and humidity is switching to pistol primers in a shortened cartridge case. Since that is one of the few things that's illegal here it does not work for hunting.
Swiss black Pyrodex or Blackhorn are soo much nicer and on top of that in this area 777 cost me just as much as Blackhorn and its getting to the point where its harder to find. I still use Pyrodex in my traditional rifles I tried using 777 and it eats patches so bad I had to use wads to protect them and that's somewhere between ridicules and self-defeating.