So I’m no expert but I was taught that when bareshaft tuning, stand 15-20 feet back from the target, hold your bow as close to vertical as you can, and shoot with good form. If the nock is higher than the arrow point then You nock point is high, lower means it’s low.....the exception being if Your nock point is set way to low it could bounce off the shelf and give you a a false high nock situation......so when starting out it’s best to start with your nock point in a spot You known will be too high and work your way down to the sweet spot.....I install nocks 3/4 Inch high When starting out........again, no expert but that’s the way I was taught and it seems to work for me.