I'll definently have to buy that book and read it. Once I read the post that said there was no real standard by which all of these cartrages are named it started to click for me. I've been looking to figure out what the common thread was and how to understand it. But now that I know there isn't a set in stone common thread it makes more since kinda intresting. Out of curiosity what is the largest cartrige anyone should use on big game (without going out to just demolish a creature)? For example I understand that a .338 will flat out do the job, but I've come across listing for some cartriges that are much larger than that in the shooters bible. What's the point of anything larger than .308?