I have two:
This group measured around 0.489-inch, for 5-shots at 200-yards
It was fired using a Ruger 77R in .25-06 Remington with Leupold 10x optics
Case: Remington
Primer: Winchester WLR
Powder: 52.5 grains of H-4831
Bullet: Sierra 120 grain Hollow Point Boat Tail
Velocity: 2922 fps 15' from muzzle
This group, which measured somewhere around 0.717-inches for 5-shots at 200-yards.
It was fired using a Ruger 77R in .25-06 Remington with Leupold 10x optics
Case: Remington
Primer: Winchester WLR
Powder: 53.3 grains of H-4831
Bullet: Nosler 120 grain Spitzer Point Boat Tail
Velocity: 3076 fps 15' from muzzle
Got about the same results using 47.7 of IMR-4350 with the Sierra bullet as the H-4831 load.
I prefer the two Sierra loads over the Nosler loading.