Many years ago, when I was much younger, much skinnier, and much more tolerant of discomfort, I carried the Hi Power and 1911 pistols at the appendix position using a simple belt-clip IWB holster. This worked for just about anything other than slow dancing with girls I didn't know real well.
Today I would be reluctant to carry anything IWB, and if I had to carry either the 1911 or BHP inside the waistband I would do so only with a holster having a good slide shield to prevent contact between my body and the hammer/grip safety/thumb safety/ rear sight/etc.