Sorry to hear that issue; the only three issues from my understanding is twist rate, bore diameter, bullet diameter and fourth might be damage near crown as bullet exits to cause that but the damage at end of barrel should make all bullets act the same
I reached out last year to the importer for chamber issue on new rifle but decided to fix it myself instead of waiting but they did respond a number of weeks later no issues with second purchase of same model in magnum caliber, t3x superlite models in stainless