I will preface this by saying I don't own a CVA and haven't shot the White Hots.
I have shot black powder, pyrodex loose powder and pyrodex pellets and have shot the 777. I had misfires with the 777 and have gone back to pyrodex pellets in my rifles. To me, the true BP was too messy to use in the field.
My actual load in my 50 cal knight inlines is 2 54 caliber 60 gr eq pellets. The 54 cal pellets fit down the bore like a glove and shoot great out to 100 yards, which is where I have my MZ rifles zeroed.
A guy I work with tried the White Hots and went back to Jim Shockey Gold. Don't remember who make that. I'm satisfied with my load so I just stick with what's been working. I fire my MZ rifle one or 2 times a year.