You can spend a lifetime studying the ballistics of different cartridges, and still not be able to pick one that is best for you. With so many different choices it really is hard to choose. But realistically, once you narrow it down to the general range of ballistics your looking for, your almost comparing apples to apples. One may have a slight edge over the other, but then there's one better than that one somewhere. Truth be known, the animal won't know the difference, complaining about an inch or two either way on a chart won't kill anymore game, and trigger time is the important thing. We've all put a lot of thought into what we shoot, but simply knowing that rifle is priceless, whatever it may be.