Are you asking about Rifle Bullets?
If you are talking about pistol bullets, I shoot thousands of Moly Bullets. The Bullets that I use are Bear Creek. I typically shoot around 200-250 rounds three times a week depending on the season. My hands are black after a session. For pistol bullets they are about as cheap as it gets and there is no lube to gum up dies or the pistol. I clean (field strip only) my main pistol (1911) once a month so every 2,000-3,000 rounds and detail clean once a year. As far as the barrel goes, I don't clean the barrel. I only take a Wilson Chamber Brush and use it with some Breakfree CLP. After using the Chamber Brush I push a clean patch down the barrel and that is as close to cleaning the barrel that I get. I make sure to wash real well after session of shooting or reloading. The jury is kind of out as far as Molybdenum and whether it is unhealthy or not. My idea is that it is better then lead. I have looked into coating bullets myself but I can't beat the price by messing with it.