Correct grip, stance, finger contact to the trigger, coupled with not fighting the recoil, goes hand and hand with putting tight groups on target.
Really, the first three are pretty quick to learn, while it the later with not trying to fight the recoil with auto's that most have a problem with instead.
You don't list your location, but if you are in the Denver area, we can get together to have you tack driving with the 1911 in no time.
Also, when you are loading the ammo to a COL, use your barrel to end up with about a .004" free jump.
FYI, top left round is when you don't flair the case mouth correctly and the bullet does not enter the case mouth squarely.