Lately I set my bow up from indoor mode getting ready for oudoor 3D. 46#, 27" draw, and shooting a 230 gr. arrow. I have been stating the speed at 280 fps on several forums. Just today I was at Kinsey's Outdoors and chrono'd the bow and lo and behold it came in at 278 fps, four shots in a row. I guess it must be about 278 fps.
Not too shabby of a guess for an old man.