Good point, maybe I have to give the counter guy more credit than I did.
But now I am thinking. I have been to this range many times and I don't remember a sign about not using wolf. In fact, no one at the counter has ever asked me what ammo I am using before I go to my lane assignment.
Next time I will do more checking. Anyway, these days I go to a different range that's close by, they allow pistol only, which is normally all I shoot.