standard 100grain slick tricks for regular and NAP spit fires are about the best for a crossbow they wont open in flight like alot of others will a crossbow produces alot of kinetic energy in a short stroke so it will open some mechanicals as soon as you pull the trigger. you dont need to buy anything specially labeled for a crossbow its all the same stuff usually different packaging youll get a better blood trail with the spitfires than the tricks but they both fly field point accurate