Regularly Carry an all-steel Colt Commander
I don't carry a 5" 1911, but I do carry the Colt Combat Commander which has the same primary carry liability as the government model -- weight. The shorter barrel helps but it is still a heavy pistol.
After trying five different holsters I had all but given up carrying this pistol comfortably. It sagged low even when using a pistol belt and required constant adjustments.
I purchased the Texas Heritage IWB holster from Tucker Gunleather and it has solved the problem for me. This holster distributes the weight farther along on the belt, and encourages the holster to hug the body. It is extremely comfortable, secure, and light-weight.
Any holster that has widely spaced clips or belt loops and is flexible should accomplish the same goal, but I am very pleased with the Tucker holster and highly recommend it. For me the solution was a good quality pistol belt and a holster that spread the weight out farther along the belt.