I've put 199 rounds through the original barrel and another 200 through the current tube. I haven't seen much creep over those rounds on the throat and I don't expect it to have big erosion issues. Powder levels are not huge staying between 28 and 32 grains most of the time. That's about 1-1.5 grains over the 22 Nosler and about 15-20% below the 22-250.
I've been shooting a lot of different rounds at the bench over the past few months covering the 17-223, 20 LBC, 22 LBC, 6X6.8, 6.5 Grendel and some 458 SOCOM so this one doesn't get all the time it deserves. As I mentioned I'm looking over my list and seeing what I want to try next. I have some heavies I might want to try. I'm not sure how many in the 60 grain spectrum I've shot but they may well be what pops up next. I know I want to shoot some 63 grain Sierra semi-points for sure.
Greg