If you have a free lead supply....that's the biggest pro you can get .
A Lee electric pot , Lyman dipper , Cast Bullet Handbook and a 2 cavity Lee mould and you in business.
The only con is it can become an interesting lifelong hobby, you buy new and better moulds , sizer-lubricators and all sorts of neat and nifty tools for loading cast bullets.
I started in 1967 , my best friends Daddy had three tire shops and gave me all the free wheel weights I could carry. My friend and his Daddy are both retired from the tire business now so I have to scrounge for them.....but I'm still casting, loading and shooting.
Cast some wad-cutters for my 41 magnum Sunday....just try buying those .
Casting makes you the master of your bullet supply and I've always enjoyed that .
Gary