I`ve used the NAP spitfires,100gr,and also Shockwaves in 85gr.No problems in performance,solid construction,and very sharp blades.Tried the Rocket Mini-Blasters and found that the blades would bend or break.I`am shooting a hunting set-up that is 413grs.@276ft per sc,which gives me about 70lbs. of KE.Good luck!