I did buff out burs on the rachet under a microscope. I also measured it and noticed no high spots. The ejector rod is straight, It's within .001" when spun on a lathe chuck. I did notice on the front of the cylinder where the cylinder meets the yoke, that there was a high spot, so I machined it down. It was only a couple thousandths. I observed no change in measurements elsewhere on the gun afterwards as that surface doesn't seem to bear on anything.

The only place I can think of left is where the yoke and ejector rod thread together. Could there be a high spot there and or are there simple fixes/part swaps that might solve the issue?