Yes Dick, you are correct but I have found the slower boolit needs a tad of expansion. Take it to 1300 or just above and it needs none as long as the meplat is decent. Go higher in velocity and some expansion is then needed again to slow it in the animal and impart more damage. But you know that, I don't have to mention it to you but you can teach a whole lot here.
You really need to write books and articles. You have a gift.
Me? I am an old cantankerous S.O.B. that is always in trouble for telling the truth!