I've been contemplating how long it takes to slip another round in a single-shot vs. clear a jam on a Remington M742 or Winchester M100. For me the time difference is very large. However, I understand some semi-auto users are so very experienced and practiced at it that they might be able to give me a run for the money
At one time years ago some pump shooters would claim they used em so they didn't have to wait on the semi to cycle...
I know a good bolt gun shooter can shoot almost as fast as I can with my AR.
I also know that your average weekend warrior, will be slower with a bolt for 2 shots than I am with a #1 for 2 shots. You keep the round handy in your wrist band, and to drop the lever flip one in and close really takes nothing to speak of time wise.