From what I have read and heard about Black Mag 3, the reason it is kicking harder and shooting higher the T7 is that it is probably developing more speed. I read somewhere that 100 gr. is a maximum load with BM3, whereas 120 gr. is normally maximum for T7. I'm still trying to get my hands on some BM3 with paying $50 a pound with the hasmat charge. Maybe a trip to cabela's next month . . . . Good luck. Roskoe.