Howa does recommend a 200 round break period if the rifle doesn't shoot out the box; It's not uncommon for them to tighten up at that mark. Its one of the hidden costs for being a lower price point barreled action/rifle - Don't expect them all to shoot like a Tikka or SAKO.
My 7.62x39 Mini-Action went from 3 MOA +/- to about 2 MOA with cheap FMJ, and 1.5 MOA to around 1 MOA with Hornady SST after a couple 100 rounds.
That said, I have a mate with a 6.5CM that shot MOA out the box, and a .223 Mini-Action that shot MOA with 77gr match ammo out the box. Those are starting to tighten up with use too.
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