6CM Accuracy Concerns - Am I expecting too much?

[J_Jacobson]

I have a Howa that has been rebarreled to 6CM with a 120fb using a 1:7.5" DD IBI Medium Hunter barrel by a very reputable gunsmith.
Whatever I do i cannot get a 10 shot group under 1.25MOA. Am I expecting too much?
I have swapped scopes, mounts, and chassis. Everything has always been degreased and paint penned.

Actions screws are tight on both the XRS and Bravo ive used.

Ive tried 107smk, 112MB, 108eldm, 80vt, and 87vmax. ADG Brass. Ar2209, ar2213sc, and AR2217. Fed GMM LRPs and Rem 9 1/2. Ive even fed it some factories.
All groups float between 1.2-1.5MOA groups for 8 to 10 shots. Sometimes i can see it wants to group, putting 5 or 6 of the shots into 0.3" then the rest of the group is scattered around it.

Am I being pedantic and this is good enough or have I forgotten something obvious?

 

[Deere_Man]

Is this a hunting rifle? If so, what does the first three shots look like when the barrel is cold?

1.5” for ten shots is just fine for a hunting rifle. She might settle down once you have a shot it some more.

How did you find this barrel manufacturer? I have never heard of them. I’m usually looking at Hart, Douglas, Krieger, Bartlein, Brux, Lilja, or Shilen.

 

[ResearchinStuff]

That's good enough to do the job, but not great. Try some h4350.