I shot the 20 rounds at 100m today with a load of 44.5gn 2208 and the 165gn Hornady. The groups were pretty ordinary compared with the ones I had shot with the same bullet and 2206H.
However I've loaded some more and bumped the load up to 45.5gn which is still under the ADI website max of 46gn. There is no compression in the load (yet) so we'll what happens next week.
The rifle seems to like a bit more velocity too, the Winchester brass has pretty good capacity and the chambering on my Howa is reasonably generous.
JD