I'm not sure, but I think nock under would mean arrow nock under nock set or point. That's how I'd understand it to mean anyways.

My Crusader is set at 6 7/8" brace height and my nock point is 3/8" above rest. It must be how I release, because the nock point of every bow that I own and shoot is the same 3/8" above rest. Anybody else have this happen with them?

Make em sharp and shoot em straight, or leave em home.