Not Momentums, but I got a couple of classic GS in a test kit. Couldn't get the Sitka to bare shaft from my 40# Samick Journey to save my life. Just for kicks, I fletched it and played with point weight some more. Now it flies like a dart, right to where I look. Same weight I tried on it while bare shafting that didn't work. Go figure... I think they're designed for high percentage let-off compounds. I probably wouldn't buy any more, but that's just my preference. They're also too pricey for the Rocky Mountain areas I go stumping in.