Man, that looks like a well-fitted Colt. You may benefit from an extended ejector, or maybe even a new normal one, especially if the previous owner was practicing with a Dremel on the original. Some think they can "better" the originals' flight plan, especially if the brass is hitting them on the noggin. Some can, but most butcher it. An extended was put on my Mark IV for this purpose. It helped quite a bit. And you said yours was shaped funny.
Join the NRA/ILA
I am the weapon; my gun is a tool. It's regrettable that with some people those descriptors are reversed.