I have been fascinated with the technology and concept. I have also cringed at the thought of adding weight to the wrong end of the shaft and messing up FOC. The other issue I mentally wrestle with was how many expensive nocks would get destroyed while getting comfortable with the new arrow.
I was messing around in the shop this morning fletching some arrows for a friend when I had one of those moments!
Nockturnal nocks are said to be 20g. I took a GT Accu-lite nock, put it on the scale and started dropping #8.5 lead shot pellets onto the pan with the nock. Roughly 16 pellets later and a little glue to hold them in and I now have my "practice" 20g nocks.
Now for the FOC problem since I seemed to be in one of those creative moments. My hunting arrows are fairly standard fair, 27.5 inches of carbon, GT insert, GT nock, 3 blazers or VaneTec HPs, and a 85g slick trick for 11+% FOC.
Hmmm, I thought, what if I swapped out the Blazers for these cool Gateway Rayzr feathers my friend bought? Well, I had try out the nocks, right? I cut the blazers off three arrows and fletched them with the feathers and added the weighted nocks... THEY SHOT and grouped PERFECT!!!!!! I'm thrilled!
Here is the math.
3 blazer's, 6g or 18g; and 8.6g for the std nock and we are at 26.6g
3 Rayzr's, 1.8g or 5.4g; and 20g for the loaded nock and we are at 25.4g
My setup does not know the difference.
I hope this helps someone as I have wrestled with this for longer than I want to admit.