Aside from the IDPA dedicate 2/3's of your range time to fast , safe presentation and fast accurate hits. Hits as ya know are all that counts so speed without hits is pretty .........pretty scary. You as I carry a 1911A1 and thus know it is the FASTEST semi-auto handgun in trained and practiced hands. If you can't put rounds on paper or steel fast then look at your carry round ...too hot ? or do ya need to work on the grip and or the gripping surface...ie; checkering, stippling, poorboy (my choice) skateboard tape, Jerry Barnhardts Burner grips ? What ever works.
The last third of your range time is policing brass to keep your range environment pristene and your reloading costs down....:o)
My last suggestion (in this post) is to get a IWB leather holster with a thumbreak if your new to the 1911A1 or you safety doesn't have a positive strong fit. I don't like holsters that clip on or paddle as they tend to stick out and have play in em when ya draw. Kramer makes a really nice one as does Galco.
Stay Safe LC !
I tried the clip-on holsters for awhile and had the same problem.
Then I tried one with two belt loops, but only spaced 1" apart. This was better than the clip-on, but still allowed for some lateral movement and some twisting of the holster.
Last year, I finally decided to do it right, and paid $100 for a Milt Sparks Versa-Max II holster for my Sig 229. The belt loops are spaced about 6" apart, which makes for great stability assuming you are wearing a good belt, such as a 1.5" Wilderness Instructor's Belt.
It's without a doubt, the best holster I've ever owned.