Speed is great. I've seen what raw speed will do to hogs and deer. I've shot a few animals with my 25-06 and 87gr bullets at speeds well over 3600fps and it's devastating. But the issue I deal with is wind. The west Texas wind never really stops and it's speed changes 15 times in 10 sec. I can look down one of the fence lines and watch the broomweed at 100yds move left to right then at 400yds it's moving right to left. You can watch dust off the gravel road move towards all 4 points of the compass coming off a truck in a half mile stretch of road. The draws and canyons and bluffs act like a funnel. I can see 300 wind turbines looking out 1 window of my blind. They typically don't build those in calm areas. I have to have enough BC to buck some of the wind. As much as I love speed and its effects on game.... a 30-50gr bullet moving at +4000fps with the BC of a ping-pong ball is not my best option.