FP,
Well, I got out to the range today and shot my MkIII at 100 metres. Five shots into a group of 2.5" wide, by 1" high. I am very happy with that, considering my near 60 year old eyes. Will do a little bit of playing with the load, but will not being running anything near max loads. Perhaps that stock you made me is the reason, eh?
Congratulations on the great shooter you have there, that is impressive, considering there are a lot of shooters who can't do that with a modern scoped rifle!