I have been carrying a full sized 1911 in an IWB holster for over 20 years at the 3 o'clock position.
I used a Bruce Nelson Summer Special for a long time, and in the last couple of years replaced it with a Milt Sparks Summer Special II.
Do not forget to get a good quality gun belt. It needs to be stiff and a couple of inches longer than your regular dress belts to allow for the IWB holster.
NRA Life Member - Orange Gunsite Member - NRA Certified Pistol Instructor
"When plunder becomes a way of life for a group of men living together in society,
they create for themselves in the course of time a legal system that authorizes it and a moral code that justifies it." Frederic Bastiat