I bought a new Howa 30-06 about a year and a half ago. I couldn't get it to shoot groups less than 2.5 inches despite loading close to the lands and with different bullets and powder. I looked at the crown and it looked good but as I was running out of options I recrowned with the Brownell's recrowning tool that I had used to good effect on my Rem 700. The groups magically dropped to half of what they were before- 1.25". Since I use it for hunting the 1.25" is acceptable to me, the 2.5" was not. If all else fails try a simple recrowning of the barrel- it's simple and quick and may help. Good luck.
Merry Christmas- oldandslow