336fps sounds like a speed cam to me. just don't get to caught up in their speed ratings. bought a new 82nd 2 yrs ago and the birth cert. said 350fps. took a few shots through the shops chrono with my 463gr arrows. at a 29" dl the best it could do was 292fps. this was just a bare string with 1 brass nock and no string loop or peep. plenty fast but nowhere near their claim of 350fps.