About the leading question - I've recently been doing some research with lead-only and started shooting it in my pistols... both .40 SW and .45 ACP. Obviously much lighter loads than the .44 GS (Gunco Special) will yield
The trick to reduce fouling seems to be to use the correct lube and loads. In other words if you're leading your barrel you're doing it wrong. I think there are limits and gas checks apparently help as well. Also the casting forumla - using pure lead will lead faster vs. an alloy such as wheel weights. Mixing some solder into a pot of pure lead will provide enough tin content to make a good alloy. I just use wheel weights
My dad suggested a way to reduce leading would be to mix jacketed bullets in with the cast, so perhaps 1 jacket following 4-5 cast would help eliminate leading. I might try that too... depends on how much leading I get using just the cast bullets. HOWEVER since all my autoloading pistols seem to function fine with the cast bullets it will definitely be casting more since it is so much cheaper!
There are tons of high-power rifle loads that use only cast bullets. I'd like to pick up the Lee cast bullet reloading manual so I can get a handle on some better loads... should have some good info in there. The Cast Boolits forum also has a plethora of information.
There about about as many bullet lube recipes as there are reloading recipes. After going through a few of the $5.00 sticks I can see why! Up on the Cast Boolit forum, there are a few more popular lubes. One of the most popular is a "green" lube (forget the nickname) that is simply parafin wax and synthetic 2-stroke engine oil. Amsoil or something like that. I'm going to the local craft/candle shop to see how cheaply I can get a pile of candles and make my own!