Before you get too into shooting the PT145, what edition is it? The millenium pro has been discontinued by Taurus...and for good reason.
Make sure to read the manual and fire it according to it. Also, make 100% sure you save ALL of the casings for the first 150 rounds through it. Taurus has received reports (and disregarded many of them) about the PT145 shooting low and left at just 7 yards.
Here's an example of the problem I had:
Shot 7 inches low and 2 inches left at 7 yards...with 3 different shooters all maintaining tight groups. Casings were being ejected oval shaped. That's right, the casings were ovaling in the chamber upon discharge...enough it was easily seen with the naked eye.
There's a lot of scuttle-butt about issues with the Millenium Pro line. A lot of hit-and-miss traffic, some owners simply refused to fight with Taurus to get a refund...others actually had to get lawyers invovled to get theirs. Mine took 17 weeks and a lawyer.
That said, the PT145's I've shot and the 9mm version that did not have issues were excellent shooters. They chewed up pretty much anything you fed them, except the really cheap Blazer ammo. If mine had been a quality shooter, I would have kept it...though the sights aren't my thing (pumpkin on a post).