Rubbish, the bore starts to break in at about 200 rounds or so.

If you neglect your bore year after year and it rusts and pits badly, then it will be ruined.

I've heard the same story about other ML's but not a T/C specifically. That they were only shot a couple hundred times and then the bore was shot out. The reality was, they were fired and then never cleaned and the bores rusted badly and in a few years time they were ruined.

I know because I have cleaned up and polished bores of about 20 rifles over the years that returned to decent shooting accuracy.

Another thing to consider if they had unusual buildup in the bore (which needs to be cleaned and removed, then the accuracy will suffer.

M2C