Want to set-up a crossbow rig specifically for heavier and difficult to penetrate game that will require the utmost in kinetic energy. Based on this I'm going to need a 650-700 minimum grain arrow and heavy duty two blade broadhead. The game planned for this set-up would include large Russian Boar, Bison, Water Buffalo and possibly Cape Buffalo. What would be the ideal rig for something like this in the context of a crossbow, arrow weight and broadhead. I think a Scorpyd Velocity 165, Dorge's Dinosaur arrows and Silver Flame broadheads would work but how heavy of a bow would be required? I currently have a TAC 15i but primarily use it for target shooting and planned to purchase a new Tenpoint Vapor which would work for for all antelope, deer and elk hunting needs. At 165lbs and 121 ft. lbs of kinetic energy with a 420 grain arrow this rig would be ideal for these needs but don't know if loading it up with a 650-700 grain arrow would work for this heavier game. Anyone who has any thoughts or experience on this I'd appreciate your input.