If it was me, I would get a bottle of Lee Liquod Alox and lube them that way. It is one of the best lubes that I have used. Lee claims that it actually removes lead from a barrel and I have seen this happen with a 357max barrel that I had. I had been shooting some Laser Cast Bullets at max volicity and got some leading. I took some of the same bullets and lubed them with the Lee stuff and they actually cleaned the barrel. Accuracy improved and the only thing that can be seen in the barrel is some streakes of lube. Don't worry about sizing the bullets, the barrel will do that for you.
Sixgun