Riddle me this: Why would I -- a self-proclaimed n00b -- be more accurate with a rented SW1911 than I am with my own personal 4567 pistol?

Two weeks ago, after much "first semi-auto" deliberation, I purchased a used 4567 at a local gun shop. In all aspects of which I'm aware, the pistol is perfect for me and my "man hands". It's big 'n heavy enough, yet concealable, and a well proven HD/SD tool.

But if you've seen my other posts, I still covet The One That Got Away. My first runner-up was a Springfield 1911, and the only reason I didn't get it was because, in my mind, I saw an advantage of DA over SA for self defense. Now, I've got a SW1911 Pro at the top of my birthday/Christmas list, and today I decided to rent a S&W SW1911 .45 at the range.

To my absolute amazement I was crazy accurate with the larger, heavier SW1911 pistol. At one point, I lost track of my shots on the target because three of them went through the same hole at 30 ft. My very first shot with the 4567 was a bulls eye, but every shot after that has been low and to the right; caused by the classic over-compensation flinch reaction that I've been told many n00bs have. I planned on hitting the range ever week 'til I mastered my 4567 enough to get back to dead center, but my question is:

Why am I so much more accurate with the SW1911 than I am with my own personal 4567? Did I make a mistake by purchasing the 4567 as my first pistol? Should I look to trade it in for my coveted SW1911 Pro (178011), or just work on my proficiency with the 4567?

Any and all comments and opinions welcome & appreciated.

- Dave