I would say your math is dead on. 1600 is the max score possible. 1550 would be fairly outrageous (not impossible).
Nevertheless, 1450 is nothing to be ashamed of. I was in the low 1200's.
Got 1570 in 1961. Beat the Unibomber. Where did it all go?
But "I have a plan" to score even higher than that.
And don't try to argue with me because my plan will depend on a whole bunch of things that will or won't have happened by the time I actually sit down for the test.
790 math, 760 verbal, 1973...