Need Some Help
 

I own a Barnett Jackal Crossbow and when I place a bolt on the rail it is shifted slightly to the right. I have tried several different brands of bolts with the same result. it causes all my shots to be about 3 in right at 20 yards. I have the scope maxed out on windage and I still miss right. i have had the scope on my crossbow for a while now with no issues until now.

how is it that the rail is shifted ??
post a couple close up pics of the rail ,,
you could shim a or I could make a mount the can adjust left/right
but that bolt needs to leave that rail straight to get good flite
or you may create a path where the bolt will or can roll over
in flite . post a pic I will see if I can help you .

Jake

tighten the bolt supporting the limbs !!!!!!!!!!!!!!!!!