Wow, This is an excellent xbow; I added Blood sport string dampeners (compatible), Bow Jax limb savers (compatible), a Nikon crossbow scope. I also shoot 22-inch bloodsport .344 diamenter xbow arrows with a 125 grain Spitfire mechanical broadhead, total weight of bolt is 454.4 grains, FOC is around 19.50. My longest distance and grouping at 60 yards is 1-2''inches with great penetration. I have't tried yet to go any futher, but with this formula my Jackal works perfectly. Not going to say it's going to work for you, but I will say this: If you take the time and tinker with it, you will also be happy with yours!

Barnett Jackal Crossbow Kill