RE: Need explanation on bullet types
To be honest the easiest way to figure all of this out is to visit all of the manufacturers web sites and view their each of their bullets descriptions and sectioned pictures.
It would literally take up a page or two to list all of the different types of bullets and what they are designed to do. There are also a lot of similarly designed bullets from numerous manufacturers tat are designed to do the same thing.
Here are most of the more popular manufacturers........ Barnes, Hornady, Speer, Sierra, Nosler, Swift, Winchester, Remington, Berger, Lapua.