Todays crossbows are capable of speeds of 500 feet per second and more. Yes, great for the trajectory and delivered energy. The limiting factors that arise from these ultrafast crossbows include arrows blowing through targets and backstops as well as arrows that lose the fletching from excessive penetration.

If you are a hunter, you will find 300fps to 360fps arrows are flat shooting enough at 30 to 40 yards and will often fully penetrate big game.  And arrows can be recovered and used again and again. Below, this wild boar was killed with a 300fps Excalibur crossbow. Full penetration at 25 yards dropped the 200 lb boar below quickly.

Loss of arrows are costly at $15 to $30 or more per arrow. Common Sense crossbow hunting rigs need to humanely kill and they do at speeds well under 250 fps. Speeds of 360 fps are fast enough for me with my other 10 Point Crossbow. Both crossbows deliver all the energy I need and foam targets can capture the arrow for reuse even with broadheads. 

For those who wish for more speed are welcome to these extremes but will pay a price for speed in the hunting woods. Equipment life will be diminished for sure as will arrow and broadhead life. 

Target shooting with super fast crossbows may be a different story with field points for fun and competition as long as backstops and targets can capture the arrow.

Be wise use and use common sense in the archery hunting woods.

Good Hunting!