I had one of my Easton Axis FMJ's awhile back that I had apparently damaged when the broadhead of arrow#7 nicked the nock end of arrow#2 - and dinged both the nock and the first 1/2" of the arrow. Didn't really notice it at first - but the arrow started always flying a little funny. And the flier is always arrow #2. I could have tuned that bow until the cows came home and never gotten good arrow flight.