The third picture is almost a side view. I can tell you that the 4 bores get 1480 ft/second with a 2000 grain bullet loaded with 115 grains of blue dot. The 700 nitro get 1996 ft/second with 160 grains of RL 15. It can be pushed to 2300 ft/second, but it is regulated for 2000 ft/second. I have not chronographed the 500, the 2 bore or the 577 yet.