Are there any online ballistic calculator that allow you to add your info and choose different zero ranges that provide arrow drop figures. All the ones I find dont allow you to change the zero range. Im trying to figure out if the ballistic crosshair on the Vortex 3X Spitfire will match up to any useable yardages with the crossbow drop. Just tired of the high speed crossbows maxing out the scope power on the crossbow ballistic scope models. Shooting 425gr approx 425 fps Any help is appreciated. Thank you in advance.