I read this article earlier today, and I found it pretty interesting. The first third of the article deals with pellets and how they kill quarry, and the second two-thirds deals with the best shot placement for rats depending on whether you are shooting for the brain or the heart/lungs, the angle the shot is taken from, and which shots should not be taken. It is a well written article that focuses more on putting the pellet in the right place, as opposed to needing 45 ft. lbs. of power to kill a rat. I hope you enjoy it as much as I did.