Are these older FMJ`s a 400 spine arrow and this guy is mistaken that he used these out of a 82 lb bow?
Or he could just have crappy arrow flight because they are too weak and that’s why he’s selling them
I was in the local box store some years ago buying some wrestling shoes for my son. We stopped in the archery isle to price check items that I was selling in my archery shop and there was a guy there just getting into archery asking the store employee for help picking out arrows. What's the number on the arrows for he asked? "The bigger the number, the heavier the arrow" the store employee said. "if you're shooting 70# or more, you should have the 400's or even the 500's " he said. "those 300's are for kids" he said.
I stopped the guy when the customer left(not buying any arrows thank God), and educated him on spine deflection and showed him the gpi of each. Then explained that Carbon Express didn't use that system and for them, he would have been correct. That kid was so happy I talked to him and couldn't wait to tell his boss that they were wrong. (He probably got fired for telling his boss he was wrong)