I am given to nostalgia on occaision too. That's why I use the .470 NE and .500 NE on the big fellows! I think most of these quandries were worked out for us many years ago. I might add that the guys who figured out what calibers worked best, often had to learn the hard way. Some paid with their lives. Each to his own, but for me, I like a little extra margin,

Geronimo