I have a Ruger M77 in .25-06 with a 1:10 twist. With this rifle, Speer 120g Spitzer SP, and IMR 7828 I have a running group average of 0.606 inches. That is a compilation of about 20 groups with the smallest being 0.504. With the same bullet and VV N160, I have shot a 0.421 and 0.366 group.
With 115g Nosler Ballistic Tips with both IMR 4350/4831 and Reloader 22, I have shot multiple groups under 1/2 inch.
I suspect a 1:10 twist for 25 caliber is adequate for heavier bullets (115-120g).
