Yeah, when I really do the math, I guess 1100 lb will compress the 12", 250# by 4.4" and the 10", 300# by 3.7". So I'm using ~8.1" out of 13-14" (22-8or9) of total compression. That's puts me right at ~5" of my 10" of travel.
Funny to think the thread started out talking about 700# spring rates and ended at 140....