What calibre?I got HPS to do it, they were closer (and had a brand-new chamber reamer, and our coach was the gunsmith)... they shot OK, it was just that on a warm day I found the bolt getting stiffer and stiffer until by the end of the kneeling practice (about 100 shots in) I was having to hit it to get it open. Mind you, this was 23 years ago.
But once reamed, the results were stunning. 10 shot groups at 50m that IIRC averaged 14mm, edge to edge, when tested at the Eley factory. And the wife's light barrel was even better - 13mm average.