Thanks to the forum, I found a load that works flawlessly in my CVA Optima Pro. I shoot 100 grains of T-7 loose powder, Nosler .451 HP bullet, and MMP-24 sabots. I've killed 2 deer this year with this load and one deer was a bang-flop and the other was right behind him, only went 60 yards or so. I totally agree with Cayugad, the bang flop usually happens when you "break him down" in the shoulders. A good clean shot tight behind the shoulder will put him down as well but you may have to walk 50 yards or so. BTW one was 136 yard and the other was 180 yards. Hope this helps.