One of the fastest guys around here was Lowell Hottenstein and he didn’t even have an ejector. The procedure was shoot, pull back on the bolt and at about the same time put a new live round in, on the way out his forefinger brought out the spent case, shut the action. He would put a five shot group on paper in about seven seconds and remember he was a Hall Of Fame shooter. I watched Lowell many time and try to pattern my method after his. Dwight Scott is the same way although in recent years he has gone to an ejector. Bear in mind one thing I didn’t say was part of the shoot and load sequence. I never said look at the target after the shot was taken and before the gun was loaded. After you slide the rifle back forward, now you look at the target. There was too much going on before you look again. You were checking flags, getting back in shape and ready to fire.
The most important piece of equipment a runner has is a good set of brakes. You have to be mindful of switches, let up, and increases in velocity.