James, I noticed the erosion while cleaning. My gun has some age on it. I believe it was made back in '90-91. Haven't shot it a significant amount, maybe 400 rounds over the years. For a while all my hand gun hunting was with contenders (6.5JDJ, .375JDJ, .45-70SSK, .35 Rem.SSK).I have stuck pretty much to W296 for my hand loads and FA bullets or Hornady XTPMags. I noticed the erosion last fall. It still shot very well, but I was concerned about safety and that's when i sent it back to FA.