You would be so better off just testing this yourself rather than seeking opinions. You never said if you are currently running a brake, or if you have to have the barrel threaded to accommodate the can.
We all have stories, and all barrels are different.
Myself, going from brakes to cans, I saw no diff, if there was any, on a couple my grouping improved. I did have marksman contour barrel with a tbac ultra on, when I slapped my magneto on it acted like a tuner and shot stupid accurate, going back to a brake solved my issues. I'm not qualified to answer just what I had going on. A POI shift is a given