Ron.....that's why my system of using open sights, and getting close has worked so well for me. I get good bullet performance without having to use hard recoiling loads. It's also easier to put the bullet right where I want it. It's not for everybody, but works good for me.
For those who take longer shots need to practice enough for consistent accuracy, and be more careful with the load/bullet they use.
That's why I ask you in your testing how far does the shot have to be when the fps matching your tested fps.