As per above i cast my own .457 balls using lead flashing or old lead water pipes. Iv also been playing with the conical bullets in my ROA cast from the same soft lead but prefer to use round ball. Much less fiddly to load for one thing. I use 16 grns of swiss fffg and semolina as a filler to bring the ball to the top of the cylinder, this is topped of with a dollop of water pump grease on every chamber to keep fouling soft applied with a lolly stick. A no11 remington cap and away we go.
Some shooters prefer wads, some fillers. Some shooters prefer B/P and some 777 or pyrodex. Some use a lube, some dont. It all comes down to personal choice and finding what works for you.
Let us all know how you get on, especially with the swaged balls. I got a couple of boxs with my last Ruger purchase and iv never tried them. Tim