Re: How hard is casting?
Lead (and its common casting alloys) is one of the easiest metals to cast. The process allows one to make excellent bullets for very little money. This is especially true if you are making handgun bullets (projectiles) that are not going to exceed 1200 fps, you have access to a source of free or cheap lead, and you have the time to make your own ammunition.
There are numerous sources of info that can be found in printed books and leaflets, and on the Internet to get one started and take one into some very technical areas that optimize cast bullet performance.
There is one caveat. Lead (and its compounds) is a poison. Often, it (like other heavy metals) is a slow cumulative poison that can and will slowly wreck your health. It can be handled and worked with safely, if good safety practices are followed; but good safety practices must be followed in order not to get poisoned.