Hmmmm. Like many a 'real' BP shooter, I'm a cheapskate at heart and about thirty years ago I bought a pile of stuff from a closing down fishing tackle store - not that I'm a fisherman, but here were some cool little fly-tying vices that serve just great for my modelling pastime. One of the things I got was a 7 pound can of Shakespeare PTFE spinner grease, and even after doling a fair bit out to pals who also shoot, I find that I still have at least half left even now. Works well on both my Gen 2 Walker and my Old Army. As for lube, well, as you may or may not be aware, anything American in the way of bullet lube or fouling softener on sale over here cast at least four times what YOU guys pay for it [try paying $17 for a plastic bottle of 'Spit-patch and see how much fun that is], and almost thiry years ago many of us in Germany started using a medical skin preparation called E45. It is a soft, white cream with no detectable odour and being an emulsion, washes away with no problem under normal cleaning. It is used over here in Yoorup to lube just about every bullet from .31 - .577, and does the job well.
I can shoot my ROA or Walker all day long, and often do, without taking them apart - just wipe them down as soon as the last shot has gone.
E45 cost about $8 a pound, btw. It's also good for your paws.
tac