Anything. I've used 300s at 1650, 260s at 1900+, and 285s at 900. The only thing in common was that every one of them never took a step. Just put the bullet in the right place and the rest is easy. A 1100 fps load is just as effective in the heart and lungs as a 1900 fps load and you and the gun appreciate it more

A fast HP is awfully impressive when it hits though!