I' m not familiar with the Martin Jaguar. But at 60# with a 309 grain arrow you should be faster than that. Your shooting around 5gr. per pound of bow weight. And that is a slow speed for that kind of weight unless the bow is an older slow cammed bow. In any event I would put more broadhead weight on that arrow probably to at least 85 gr. and I personally would use either 90 or 100 gr broadheads. At the speed you are shooting your arrow probably doesn' t weigh enough for a clean passthrough shot. But if it works for you, thats ok too. My experience has been that shooting a light arrow like that doesn' t give me the performance that hunting shots require. I' d add some broadhead weight. The Reflex will shoot a lot faster than what you have now.