I shoot a 386 gr. arrow, @ 5.6 gpp, out of a Hoyt UltraMag. I have no access to a chrono, what speed do you think I should be getting. i think it is shooting around 285 fps.

Go here www.bowjackson.com and you might be able to figure it out.

What is the draw weight and what is the draw length and what do you have on your string?

68 #, 30 "
peep with tube, cat whiskers string loop