Hi l have a Parker Ambusher crossbow and was wondering about the kinetic energy and the speed with the bow set to 135lbs draw weight versus the 160 lb draw weight. We will primarily be hunting hogs and deer with the bow. Do we need to turn up the draw weight for deer and hog. Manual say it 315 fps is that at the 160lbs draw weight and is it a lower speed at the 135lb draw weight, and if so what is that speed? Plus will it be harder on the limbs at 135lb draw weight versus 160lb draw weight. We will be using 400 grains or 425 grains of arrow weight. Any answers are greatly appreciated.