Last month I double-lunged a 10 point buck at 525 yards with the 176 grain bullet. Cartridge was 7 Dakota in a 30 inch barrel.
74 grains of RL25 for a velocity of 3130 FPS. The BC does seem as high as I had hoped, about .750 according to my in-flight tests.
The jackets on these are made by Sierra and are about 50% thicker than on a matchking, I would guess. As a comparison the jacket on the A-max is significantly thinner than the matchking.
Last year I shot 4 deer (one shot kills) at ranges from 525 to 690 and got no pass-through with A-max or Matchking bullets. I decided to look for a high bc bullet with a sturdier jacket construction to gain pass-through for tracking purposes.
Bob's bullet fits the bill perfectly. The exit wound was just over 1 inch in diameter. Accuracy was about the same as the MK, which is sort of an accuracy standard other bullets are judged by.