Just bought my first batch of bullets. My press should be getting here early next week, so i've been getting all the components i need. I went with montana gold 230gr fmj. I bought 1000 to start, so hopefully these will work fine. Questions: What is the difference when a bullet is labeled CMJ compared to FMJ? I know one is full metal jacket, but what is CMJ? Second, do you guys mostly shoot cast lead bullets or jacketed? Is there any benefit to the jacketed that warrants the price difference?