The funny thing is SS197 is made by Fiocchi, same people who make the AE TMJ... I think most of these failures are because the 40gr TMJ is a really short bullet, so the glue used to hold these in place doesn't have a good amount of bearing surface needed like SS197SR or the longer 27gr bullets. That being said, I hardly run into any issues with it in the FSN, and even in my SBR are few, far and in between.