T.S.,
I'll try to answer some of your questions.
1. IMHO, there are absolutely no drawbacks to using lead bullets over jacketed bullets. In fact, there are several plusses - more accurate, less wear on barrel, and cheaper to purchase.
2. I always shoot 500 rounds of FMJ though a new barrel to "break it in" by smoothing the sharp edges. Don't really know if this is necessary or only an illusion, but it seems to me that doing this will make the barrel less likely to "shave" lead when I start shooting lead bullets. Don't have that many new barrels to break in to do a true comparitive test.
3. IME, barrel leading is not much of a problem, if your barrel has been properly "broken in" and conditioned. By conditioned I mean consistently using something like FP-10 to clean your barrel so that the lead really never "adheres" to the inside of the barrel. I always get barrel leading, but it's not a problem to remove. There is one mechanical method and two chemical methods I'm aware of that do an excellent job. The mechanical method is simply wrapping some strands of copper chore boy around an undersize brush and "scrubbing" the lead out. This is best done in a "dry" barrel before any liquid solvents are added. One chemical method is using a Foul Out electronic unit, but, even though I own one, I hardly ever have to use it. The other chemical method is not as well accepted by everyone, so I won't go into any details, other than to say it involves hydrogen peroxide and vinegar.
4. Any 230gr LRN (lead, round nose) bullet would be an equivalent to a WWB 230gr FMJ.
5. LSWC=lead, semi-wadcutter; LRN (see above); LFP=lead, flat point; RNFP=round nose, flat point. I'm sure there's more, but these are all the come to mind right now.
6. IMO, the "best" brand of 45acp lead bullet is the one you can buy cheapest. What I"m saying is, they're all good, and any differences will be very slight.
Good luck in your reloading endeavors, and don't be worried about using lead bullets.
Rod.