Got one the other day. So far have only shot one 10 round group. The 2x4 of a stock had to go. Did a 5 minute epoxy bed to get the barrel centered and stop contact and sent it off to get slimmed way down. It'll be a cool lightweight hunting rifle when finished.
Hornady ELD-M 123gr Factory went 1.15 MOA at 100 yards for ten rounds.
I took my howa to the range the other day shoot a few groups all a little under an inch at 100 yards. Shot hornady black 6.5 grendel getting ready to start reloading. I put mine in a boyds pro varmint stock. The 6.5 grendel forum has a bunch of good info about the howa mini actions.