Respectfully, You don’t need a Tipton rod for that barrel. And You didn’t ruin Your barrel with that segmented aluminum rod.

Question...how did You prove that the problem wasn’t the scope ?

And, a common problem is the front ring/base screw being too long and bottoming out on the barrel threads, in case You haven’t checked on that.

A 4 or 5 inch group at 100yds is something besides the cleaning rod.