Not so sure Tom... 105 rds total of fire forming and maybe 40 test rds. on Alex's new BRA build for me: ZX4m9moaRFiBhMIZvflefg by Larry Malinoski, on Flickr Happy and sad because of you... PICT0058 by Larry Malinoski, on Flickr Look at the carbon build-up in front of the leade at the end of the throat. Sad to see this but happy you motivated me to look with my borescope. There does seem to be a bit of leade edge wear but nowhere as nasty as with my Dashers. Oh - I just used some CLR and BoreTech CR-4 to clean it out. Here's the same only after cleaning. PICT0060 by Larry Malinoski, on Flickr You can see a teeny bit of edge wear starting. I can form no conclusions about throat wear with BRA from this single example.