My first bow was a 40X red striped Super Grizzly. The salesman told me it was really 45 pounds.
Since I had only used lower weight target bows at college, I was impressed with the power and speed of my new bow. That Grizzly's "X" was impressive.
In 2002, I replaced the original side plate, and voila!, it had been measured at 45. Bear Archery must have sent paper records to the dealer, or the salesman had checked the bow with a bow scale.
I measured it with a bow scale a few years ago, and it really is 47 at 29 1/2.