Howa Barrel Break-in

[Oso Polaris]

I have seen a fair number of posts where the barrel break-in takes 150-200 rounds before barrel settles down and shoots consistently. Typical indication of rough barrel (tooling marks, burs, etc.) Unfortunately, I don't own a borescope and I don't want the OCD that develops with owning one. My experience is that majority of factory barrels benefit from lapping to remove the imperfections of mass production. I can accomplish this by either hand lapping or by shooting enough bullets down barrel to smooth out the rough spots.

I was hoping to quickly stabilize barrel performance before making effort to begin load development. Thought Tubb's bullets might be the new better mouse trap then spending hot afternoon at shooting bench with plinking rounds, cleaning solvent and J-B paste.