Ash, try paper patching & trailboss at least you won't start any fires out West with that!
Virtually no clean up except for a bit of carbon cleaner & an oiling.
When doing my .500 I have no leading issues & after a few swabs its clean as a whistle (except I use BP as propellant) I only use these loads on a range as I'm too nervous to use them hunting.
Looks an interesting old girl - but you do alright with it too!
Cheers
93x64mm