My son and I both use 54 cal. Knights. They are a great weapon and have performed extremely well for us.I also use pyrodex but that 777 sounds interesting.I might pick some up and give it a try.
I bought some Williams aftermarket sights that I love.They are fiber optic and made out of machined aircraft alum.
I first used some C.V.A. fiber optics and they were a cheap peice of crap that cost me a 6x6 bull at about 40 yds.I learned a good lesson on cutting costs there.
I use a so called waterproof german made cap that is readily available. They are way hotter and have not once failed to fire,in the most miserable weather you can imagine.
I also try to tuck the bolt area under my arm if the weather is really adverse.For more protection on the inlines just put a peice of tape over the cap area.Dont know how legal it is,but it works great.
Last year sucked for us,do to access problems because of the dry weather. This year we hunted modern firearm for the first time in a few years,but plan on going back to frontstuffers next year.
My boy got a beautiful 5x5 elk on opening morning.Great first elk.(he had one proud Dad with him)
I got a 4x4 +eyegaurds buck yesterday morning.It was a smaller rack,but very unique.
Hopefully I will be able to post some pictures soon.
Good luck on the muzzle loading. Be sure to buy a few speedloaders.Also I have noticed that powder measures can vary by manufacturer.You can get the Knight Wolverines in a starter kit pretty reasonable,especially if you catch them on sale.