My 150# crossbow can hit speeds of 215 FPS , my 180# hits 235 FPS . Both have red dot sights , although I'm changing the 180# to a crossbow reticle scope . Most of the lower end crossbows are well under 300 FPS , higher end ones like Excalibur and Ten Point will deliver much higher speeds . Any crossbow of legal draw weight will achieve more than sufficient speed and energy for passthroughs at ranges up to 30 yards . Bolts lose energy faster than arrows though , so keep your shot range under 40 yards . Be sure to buy a drawing device since you have shoulder problems , they come in either a rope/pulley system or crank mechanism .