I have used Hart, Krieger, Lilja, PacNor.... had the Hart on a Ruger M77 in .270. I do not recall if Hart barrels are cut rifled or not, I seem to think they are. Mine was installed by Darrell Holland many years back. Just like Doesniper said, most of it is the smith. Mine was a tack driver but it did take some break in. If its installed correctly and all other things like bedding and scope rings, etc., are done right the gun may welll be a tack driver. Hart barrels are usually up to the task. Personally I am floored by my M1A barreled with a Krieger but that's another story. Call Hart, run the guys name by them, they should have records.
RR