I use Montec 125 gr. These are a 3-blade design that flies great and is deadly. My X-Bow is rated to shoot 350 fps ... but I have never timed it. The broad head is a one piece design and requires sharpening if the edges are dulled. Takes only a few strokes on any quality flat surfaced sharpener. Not a replacable blade design. I have used these only on white tail and feral hogs.