The way I look at it it's not voodoo, it's science. There will probably always be a random/chaos element in terminal performance but that's not an excuse not to design bullets scientifically. The ancient samurai tested their swords on the bodies of prisoners. Since we can't do that nowadays ord gel is a good stand in. Just because a bullet does well in gelatin doesn't mean it will be a great fighting round but it's a rare one that does poorly in standardized testing yet excels in combat.

I'm in favor of controlled expansion and bonded bullets.