From the research I have done, crossbow arrows are basicly a 400 spine, but they are the standard 22 diameter so you really cant use a 400 arrow shaft as the diameter is too small. The only real diferance is in thickness and weight of the shaft, but being so short, there is no real archers paradox to contend with, so the spine is almost moot. So long as it is stiff enough to absorb the shock without folding, the real diferance will be final weight and straightness. OH...and if it is camo or not
Wyvern