The Diamond D holster, being leather, and having an adjustable tension screw, leaves no need for level 2 retention. I could do handstands with it on, (I actually did this once) and it won't fall out.
It's been many years since I shot competition. I shot at Ft Richardson at the state matches (Army NG), and later went to Arkansas for the Winston P Wilson Rifle, Pistol, and Machine Gun national championships. I wasn't the best by a long shot, but I belonged there. My aggregate score for the week in all matches (Rifle and Pistol) put me at 11% in the rankings.
The target looks like this:
(the scoring rings are different though, the 5 ring is 3 inches, and the 3 ring is 6 inches. There's also a (hard to see) triangle in the head area.
The first 2 rounds are to the center of mass, and the third shot is to the head. If you don't hit the head shot, the score for the entire 3 shots is 0. It was a lot of fun, it was challenging, and I was by no means the best shot there. My forte was rifle, and I was on the rifle team from Alaska. Everyone shoots the rifle and pistol EIC matches though.