I ran across the topic of cast bullets. Does anyone use or have used these in the past? What are the positives and negatives of using these bullets? From what I have read they require slightly different loading methods and can foul up a barrel. My reason for asking is that my father is sending a 30/30 out to me (he never shoots it) and was thinking that the 140gr. bullets from Bear Tooth Bullets would make some fun and CHEAP (100 for $10) bullets to shoot.