The hard stuff in bp bores from petrol lube is said by some internet authorities to be asphaltum which is a fancy Latinate way to say too much baked tar. Oddly, the same authorities claim that both Ballistol (which I think is not much more than soluable "cutting oil" for machining) and parafine (both petroleum derivatives)do not contain the nasty-maker. I'm using beexwax, parafine, neatsfoot blend for bp revolver lube wads. No major hard deposits that I've noticed. Last nite I went outside to run a kleenex soaked in choke cleaner thru the bores of Lefever and then a kleenex coated with that bore butter stuff in preparation to shoot my new bp cartridge loads. Also no hard deposits. Most of it was gone with cold water from the hose. I sprayed bores on a couple stations with the milk of moose in my case made from NAPA cutting oil and water. Seems any rendered animal fat or veggie oil has more "natural goodness" than some petroleum distillates.
To back up the low-load, low-friction pov, some mechanical contrivances need a barrier to dirt entry worse than they need lube. Case in point, exposed bicycle chain. Folks who use oil have chains which collect dirt and grit. Pin and link wear from abrasive grinding = chain stretch and a skippy mesh with cogs. Those who clean chain off the bike in kero or gas and dip in melted parafine don't get chain stretch because the parafine simply "fills" the numerous bearing contact points.
jack
