The turrets change the point of impact. If the group is to the right, you correct the turret to the left.
What is Ganderite's "barrel seasoning method"?
Turrets...yep. I was in a state of second and third guessing myself at 200m...shake my head. As shown, I got it into an 8" zone though slightly low and to the right. Next range session I'm confident this rifle will at least half that, and most likely more. Once I get comfortable and the scope dialed in for 200m zero it'll put 5 into the white bullseye consistently, I'm certain of it. It was doing that at 50m, so it's replicable at 200m.
Gandertite is a competition shooter (he doesn't know it because of anonymity, but I've shot with him in the past), and it's either his son-in-law, or his blood son that shoots at Bisley, so when he recommended seasoning or prepping the rifling, I listen. Even if I was still sceptical.
His method is to start from a new barrel. Using "wipe out" which is a copper solvent that foams and expands like shaving cream out of can, clean the new barrel. Leave it "soak" for 24 hours. For this step, my rifle was almost horizontal. A slight angle toward the muzzle. I rotated the rifle 180 degrees (flip over to the other side) at 12 hours.
To my surprise, my "new" barrel had the tell tale blue of copper fouling, though very light on cleaning patch. Three tight patches and I was "clean" on the third patch. I then pulled the gas regulator and piston and found carbon. Test rounds from the factory no doubt as it was only slightly sooted.
There is no need to oil the barrel or run a wet patch as "wipe out" advertises that it protects against rust once applied.
Once at the range, fire one round. Wipe out. No brushes, just patches. Once clean, fire two rounds. Wipe out. Then 5 rounds, and Wipe out...once the patch comes clean, the barrel is "seasoned". These intervals are nowhere near 24 hour soaks. More like 10 minutes. After this treatment, I shot the rest of the day (maybe 200 rounds, I wasn't counting). When I got home, I filled the barrel with wipe out and let it sit 24 hours, again flipping it part way through the soak...and six patches this morning, and it was clean! White patch clean!?
I hope he chimes in here, but Gandertite explains that it is much easier to keep a barrel clean than having fouling just build on top of itself for successive rounds fired. I have always thought that with the pressures involved behind a bullet, as well at the forcing of the bullet into the rifling, there's no way anything aside from soot could possibly be left behind. DI gas system thinking, but I was wrong, the old fella and his Bisley experience was correct!
I found that "Wipe Out" was not easy to find for anything under $50 a 5 ounce can shipped and no one near me was stocking it. I found a place out of Quebec that was selling for $25 a can and they weren't killing me on shipping so I ordered 2 cans of it. With all the cleaning I've done, I don't think I'm a quarter of the way through the can. A little goes a long way with it's foaming action.