Waynzee, I'm in the same boat regarding a switch to Blackhorn...
I have a few boxes of 777 pellets on hand (all vacuum sealed, seems to keep rather well that way).
And yes, once you find the right primers, the crud ring issue all but goes away.
I keep telling myself I'll switch to BH once my stockpile is used up, but I'm not sure the math is there...
I'm not totally sold on the benefits of BH outweighing the cost, not just monetary, but in slower loading, more measures, tubes, etc to buy and carry in the field.
I can get off 3 shots with harvester sabot/300gr XTP without having accuracy suffer or difficulty loading... after 3, a spit patch is a must.
Swabbing between ever 2nd or 3rd shot never bothered me. When I'm at the range, I like to replicate field conditions, not race through powder.
As for cleaning, sure, BH is king, but I can't complain about the routine for 777.
I use the CVA Barrel Blaster foam. Drop QRBP and small parts into parts cleaner, squirt the bore with foam, let both sit for a beer or two, then swab out. Dry patch, rust inhibitor patch, wipe down, done.
My Optima V2 has seen several hunts and about two hundred rounds at the range, bore looks NIB.